James J. Dignam

Research Summary
Dr. Dignam's primary research involves the design, conduct, and analysis of cancer clinical trials, including early development (phase I), pilot efficacy and safety (phase II), and definitive evaluation (phase III) trials. He is the Executive Director of the Statistics and Data Management Center for NRG Oncology, a National Cancer Institute sponsored multi-center clinical trials group with over 500 recruitment sites in North America and beyond and over 100 active clinical trials. Dr. Dignam's methodology interests include trial monitoring and early stopping rules, competing risks, hazard function estimation, and prognostic modeling. He also has engaged in and led investigations into sociodemographic factors such as race/ethnicity and BMI/obesity on cancer prognosis and treatment response. Courses taught include introductory biostatistics, clinical trials, survival analysis, and regression modeling methods.
survival analysis, clinical trials, competing risks, modeling, health disparities in cancer
  • University of Pittsburgh, Graduate School of Public Health, Pittsburgh, PhD Biostatistics 05/1994
  • Saint Xavier College, Chicago, BA Mathematics 05/1986
Biosciences Graduate Program Association
Awards & Honors
  • 1991 - Inducted Member Delta Omega, National Public Health Honor Society
  • 2019 - Elected Fellow Society for Clinical Trials
  • 2021 - Co-recipient, Statistical Partnership Among Academe, Industry, and Government (SPAIG) Award American Statistical Association
  1. Korpics MC, Katipally RR, Partouche J, Cutright D, Pointer KB, Bestvina CM, Luke JJ, Pitroda SP, Dignam JJ, Chmura SJ, Juloori A. Predictors of Pneumonitis in Combined Thoracic Stereotactic Body Radiation Therapy and Immunotherapy. Int J Radiat Oncol Biol Phys. 2022 11 15; 114(4):645-654. View in: PubMed

  2. Turchan WT, Cutright D, Wu T, Leng JX, Dignam JJ, Eggener SE, Liauw SL. Hematuria following Post-Prostatectomy Radiotherapy: Incidence Increases with Long-Term Followup. J Urol. 2022 06; 207(6):1236-1245. View in: PubMed

  3. Griggs JJ, Bohlke K, Balaban EP, Dignam JJ, Hall ET, Harvey RD, Hecht DP, Klute KA, Morrison VA, Pini TM, Rosner GL, Runowicz CD, Shayne M, Sparreboom A, Turner S, Zarwan C, Lyman GH. Appropriate Systemic Therapy Dosing for Obese Adult Patients With Cancer: ASCO Guideline Update. J Clin Oncol. 2021 06 20; 39(18):2037-2048. View in: PubMed

  4. Polley MC, Dignam JJ. Statistical Considerations in the Evaluation of Continuous Biomarkers. J Nucl Med. 2021 05 10; 62(5):605-611. View in: PubMed

  5. Feng FY, Huang HC, Spratt DE, Zhao SG, Sandler HM, Simko JP, Davicioni E, Nguyen PL, Pollack A, Efstathiou JA, Dicker AP, Todorovic T, Margrave J, Liu YS, Dabbas B, Thompson DJS, Das R, Dignam JJ, Sweeney C, Attard G, Bahary JP, Lukka HR, Hall WA, Pisansky TM, Shah AB, Pugh SL, Shipley WU, Tran PT. Validation of a 22-Gene Genomic Classifier in Patients With Recurrent Prostate Cancer: An Ancillary Study of the NRG/RTOG 9601 Randomized Clinical Trial. JAMA Oncol. 2021 04 01; 7(4):544-552. View in: PubMed

  6. Dignam JJ. Disparities in Breast Cancer: Narrowing the Gap. J Natl Cancer Inst. 2021 04 06; 113(4):349-350. View in: PubMed

  7. Hu C, Dignam JJ. Biomarker-Driven Oncology Clinical Trials: Key Design Elements, Types, Features, and Practical Considerations. JCO Precis Oncol. 2019; 3. View in: PubMed

  8. Pugh SL, Rodgers JP, Moughan J, Bonanni R, Boparai J, Chen RC, Dignam JJ, Bruner DW. Do reminder emails and past due notifications improve patient completion and institutional data submission for patient-reported outcome measures? Qual Life Res. 2021 Jan; 30(1):81-89. View in: PubMed

  9. Gensheimer MF, Yom SS, Soto N, Dignam JJ, Le QT, Machtay M, Curran WJ. Multicenter Clinical Cancer Research After COVID-19: A Perspective From NRG Oncology. Int J Radiat Oncol Biol Phys. 2020 10 01; 108(2):483-485. View in: PubMed

  10. Pugh SL, Rodgers JP, Yeager KA, Chen RC, Movsas B, Bonanni R, Dignam J, Bruner DW. Characteristics of Participation in Patient-Reported Outcomes and Electronic Data Capture Components of NRG Oncology Clinical Trials. Int J Radiat Oncol Biol Phys. 2020 11 15; 108(4):950-959. View in: PubMed

  11. Xie W, Regan MM, Buyse M, Halabi S, Kantoff PW, Sartor O, Soule H, Berry D, Clarke N, Collette L, D'Amico A, Lourenco RA, Dignam J, Eisenberger M, James N, Fizazi K, Gillessen S, Loriot Y, Mottet N, Parulekar W, Sandler H, Spratt DE, Sydes MR, Tombal B, Williams S, Sweeney CJ. Event-Free Survival, a Prostate-Specific Antigen-Based Composite End Point, Is Not a Surrogate for Overall Survival in Men With Localized Prostate Cancer Treated With Radiation. J Clin Oncol. 2020 09 10; 38(26):3032-3041. View in: PubMed

  12. Dess RT, Sun Y, Jackson WC, Jairath NK, Kishan AU, Wallington DG, Mahal BA, Stish BJ, Zumsteg ZS, Den RB, Hall WA, Gharzai LA, Jaworski EM, Reichert ZR, Morgan TM, Mehra R, Schaeffer EM, Sartor O, Nguyen PL, Lee WR, Rosenthal SA, Michalski JM, Schipper MJ, Dignam JJ, Pisansky TM, Zietman AL, Sandler HM, Efstathiou JA, Feng FY, Shipley WU, Spratt DE. Association of Presalvage Radiotherapy PSA Levels After Prostatectomy With Outcomes of Long-term Antiandrogen Therapy in Men With Prostate Cancer. JAMA Oncol. 2020 05 01; 6(5):735-743. View in: PubMed

  13. Xie W, Halabi S, Tierney JF, Sydes MR, Collette L, Dignam JJ, Buyse M, Sweeney CJ, Regan MM. A Systematic Review and Recommendation for Reporting of Surrogate Endpoint Evaluation Using Meta-analyses. JNCI Cancer Spectr. 2019 Mar; 3(1):pkz002. View in: PubMed

  14. Dess RT, Hartman HE, Mahal BA, Soni PD, Jackson WC, Cooperberg MR, Amling CL, Aronson WJ, Kane CJ, Terris MK, Zumsteg ZS, Butler S, Osborne JR, Morgan TM, Mehra R, Salami SS, Kishan AU, Wang C, Schaeffer EM, Roach M, Pisansky TM, Shipley WU, Freedland SJ, Sandler HM, Halabi S, Feng FY, Dignam JJ, Nguyen PL, Schipper MJ, Spratt DE. Association of Black Race With Prostate Cancer-Specific and Other-Cause Mortality. JAMA Oncol. 2019 07 01; 5(7):975-983. View in: PubMed

  15. Bruner DW, Pugh SL, Lee WR, Hall WA, Dignam JJ, Low D, Swanson GP, Shah AB, Malone S, Michalski JM, Dayes IS, Seaward SA, Nguyen PL, Pisansky TM, Chen Y, Sandler HM, Movsas B. Quality of Life in Patients With Low-Risk Prostate Cancer Treated With Hypofractionated vs Conventional Radiotherapy: A Phase 3 Randomized Clinical Trial. JAMA Oncol. 2019 May 01; 5(5):664-670. View in: PubMed

  16. Beitler JJ, Switchenko JM, Dignam JJ, McDonald MW, Saba NF, Shin DM, Magliocca KR, Cassidy RJ, El-Deiry MW, Patel MR, Steuer CE, Xiao C, Hudgins PA, Aiken AH, Curran WJ, Le QT. Smoking, age, nodal disease, T stage, p16 status, and risk of distant metastases in patients with squamous cell cancer of the oropharynx. Cancer. 2019 03 01; 125(5):704-711. View in: PubMed

  17. Dignam JJ, Hamstra DA, Lepor H, Grignon D, Brereton H, Currey A, Rosenthal S, Zeitzer KL, Venkatesan VM, Horwitz EM, Pisansky TM, Sandler HM. Time Interval to Biochemical Failure as a Surrogate End Point in Locally Advanced Prostate Cancer: Analysis of Randomized Trial NRG/RTOG 9202. J Clin Oncol. 2019 01 20; 37(3):213-221. View in: PubMed

  18. Jiang W, Cai MY, Li SY, Bei JX, Wang F, Hampel H, Ling YH, Frayling IM, Sinicrope FA, Rodriguez-Bigas MA, Dignam JJ, Kerr DJ, Rosell R, Mao M, Li JB, Guo YM, Wu XY, Kong LH, Tang JH, Wu XD, Li CF, Chen JR, Ou QJ, Ye MZ, Guo FM, Han P, Wang QW, Wan DS, Li L, Xu RH, Pan ZZ, Ding PR. Universal screening for Lynch syndrome in a large consecutive cohort of Chinese colorectal cancer patients: High prevalence and unique molecular features. Int J Cancer. 2019 05 01; 144(9):2161-2168. View in: PubMed

  19. Dignam JJ, Winter KA, Michalski J. Detecting a Survival Benefit to Dose Escalation-Reply. JAMA Oncol. 2019 01 01; 5(1):110. View in: PubMed

  20. Gillison ML, Trotti AM, Harris J, Eisbruch A, Harari PM, Adelstein DJ, Jordan RCK, Zhao W, Sturgis EM, Burtness B, Ridge JA, Ringash J, Galvin J, Yao M, Koyfman SA, Blakaj DM, Razaq MA, Colevas AD, Beitler JJ, Jones CU, Dunlap NE, Seaward SA, Spencer S, Galloway TJ, Phan J, Dignam JJ, Le QT. Radiotherapy plus cetuximab or cisplatin in human papillomavirus-positive oropharyngeal cancer (NRG Oncology RTOG 1016): a randomised, multicentre, non-inferiority trial. Lancet. 2019 01 05; 393(10166):40-50. View in: PubMed

  21. Debiasi M, Polanczyk CA, Ziegelmann P, Barrios C, Cao H, Dignam JJ, Goss P, Bychkovsky B, Finkelstein DM, Guindalini RS, Filho P, Albuquerque C, Reinert T, de Azambuja E, Olopade O. Efficacy of Anti-HER2 Agents in Combination With Adjuvant or Neoadjuvant Chemotherapy for Early and Locally Advanced HER2-Positive Breast Cancer Patients: A Network Meta-Analysis. Front Oncol. 2018; 8:156. View in: PubMed

  22. Shi W, Scannell Bryan M, Gilbert MR, Mehta MP, Blumenthal DT, Brown PD, Valeinis E, Hopkins K, Souhami L, Andrews DW, Tzuk-Shina T, Howard SP, Youssef EF, Lessard N, Dignam JJ, Werner-Wasik M. Investigating the Effect of Reirradiation or Systemic Therapy in Patients With Glioblastoma After Tumor Progression: A Secondary Analysis of NRG Oncology/Radiation Therapy Oncology Group Trial 0525. Int J Radiat Oncol Biol Phys. 2018 01 01; 100(1):38-44. View in: PubMed

  23. Xie W, Regan MM, Buyse M, Halabi S, Kantoff PW, Sartor O, Soule H, Clarke NW, Collette L, Dignam JJ, Fizazi K, Paruleker WR, Sandler HM, Sydes MR, Tombal B, Williams SG, Sweeney CJ. Metastasis-Free Survival Is a Strong Surrogate of Overall Survival in Localized Prostate Cancer. J Clin Oncol. 2017 09 20; 35(27):3097-3104. View in: PubMed

  24. Lawton CAF, Lin X, Hanks GE, Lepor H, Grignon DJ, Brereton HD, Bedi M, Rosenthal SA, Zeitzer KL, Venkatesan VM, Horwitz EM, Pisansky TM, Kim H, Parliament MB, Rabinovitch R, Roach M, Kwok Y, Dignam JJ, Sandler HM. Duration of Androgen Deprivation in Locally Advanced Prostate Cancer: Long-Term Update of NRG Oncology RTOG 9202. Int J Radiat Oncol Biol Phys. 2017 06 01; 98(2):296-303. View in: PubMed

  25. Hagar Y, Dignam JJ, Dukic V. Flexible modeling of the hazard rate and treatment effects in long-term survival studies. Stat Methods Med Res. 2017 Oct; 26(5):2455-2480. View in: PubMed

  26. Shipley WU, Seiferheld W, Lukka HR, Major PP, Heney NM, Grignon DJ, Sartor O, Patel MP, Bahary JP, Zietman AL, Pisansky TM, Zeitzer KL, Lawton CA, Feng FY, Lovett RD, Balogh AG, Souhami L, Rosenthal SA, Kerlin KJ, Dignam JJ, Pugh SL, Sandler HM. Radiation with or without Antiandrogen Therapy in Recurrent Prostate Cancer. N Engl J Med. 2017 02 02; 376(5):417-428. View in: PubMed

  27. Smith GL, Ganz PA, Bekelman JE, Chmura SJ, Dignam JJ, Efstathiou JA, Jagsi R, Johnstone PA, Steinberg ML, Williams SB, Yu JB, Zietman AL, Weichselbaum RR, Tina Shih YC. Promoting the Appropriate Use of Advanced Radiation Technologies in Oncology: Summary of a National Cancer Policy Forum Workshop. Int J Radiat Oncol Biol Phys. 2017 03 01; 97(3):450-461. View in: PubMed

  28. Thomas CR, Wilson JW, Mamounas EP, Raich PC, Lagrange A, Dignam JJ, Wickerham DL, Nolmark N. Impact of ethnic neutropenia disparity analysis in NSABP breast trials of postoperative doxorubicin (A)/cyclophosphamide (C). J Clin Oncol. 2005 Jun; 23(16_suppl):6002. View in: PubMed

  29. Dignam JJ, Polite B, Yothers G, Raich P, Colangelo L, O'Connell M, Wolmark N. Effect of body mass index on outcomes in patients with Dukes B and C colon cancer: An analysis of NSABP randomized trials. J Clin Oncol. 2005 Jun; 23(16_suppl):3533. View in: PubMed

  30. Zhang Q, Freidlin B, Korn EL, Halabi S, Mandrekar S, Dignam JJ. Comparison of futility monitoring guidelines using completed phase III oncology trials. Clin Trials. 2017 Feb; 14(1):48-58. View in: PubMed

  31. Ferrer L, Rondeau V, Dignam J, Pickles T, Jacqmin-Gadda H, Proust-Lima C. Joint modelling of longitudinal and multi-state processes: application to clinical progressions in prostate cancer. Stat Med. 2016 09 30; 35(22):3933-48. View in: PubMed

  32. Lee WR, Dignam JJ, Amin MB, Bruner DW, Low D, Swanson GP, Shah AB, D'Souza DP, Michalski JM, Dayes IS, Seaward SA, Hall WA, Nguyen PL, Pisansky TM, Faria SL, Chen Y, Koontz BF, Paulus R, Sandler HM. Randomized Phase III Noninferiority Study Comparing Two Radiotherapy Fractionation Schedules in Patients With Low-Risk Prostate Cancer. J Clin Oncol. 2016 07 10; 34(20):2325-32. View in: PubMed

  33. Polite BN, Cipriano-Steffens T, Hlubocky F, Dignam J, Ray M, Smith D, Undevia S, Sprague E, Olopade O, Daugherty C, Fitchett G, Gehlert S. An Evaluation of Psychosocial and Religious Belief Differences in a Diverse Racial and Socioeconomic Urban Cancer Population. J Racial Ethn Health Disparities. 2017 04; 4(2):140-148. View in: PubMed

  34. Hou N, Huo D, Dignam JJ. Prevention of colorectal cancer and dietary management. Chin Clin Oncol. 2013 Jun; 2(2):13. View in: PubMed

  35. Dignam JJ, Karrison TG. Building firm foundations for therapy development. J Natl Cancer Inst. 2015 Mar; 107(3). View in: PubMed

  36. Wang M, Dignam JJ, Won M, Curran W, Mehta M, Gilbert MR. Variation over time and interdependence between disease progression and death among patients with glioblastoma on RTOG 0525. Neuro Oncol. 2015 Jul; 17(7):999-1006. View in: PubMed

  37. Bouman P, Meng XL, Dignam J, Dukic V. A Multiresolution Hazard Model for Multicenter Survival Studies: Application to Tamoxifen Treatment in Early Stage Breast Cancer. J Am Stat Assoc. 2007 12; 102(480):1145-1157. View in: PubMed

  38. Pisansky TM, Hunt D, Gomella LG, Amin MB, Balogh AG, Chinn DM, Seider MJ, Duclos M, Rosenthal SA, Bauman GS, Gore EM, Rotman MZ, Lukka HR, Shipley WU, Dignam JJ, Sandler HM. Duration of androgen suppression before radiotherapy for localized prostate cancer: radiation therapy oncology group randomized clinical trial 9910. J Clin Oncol. 2015 Feb 01; 33(4):332-9. View in: PubMed

  39. Korn EL, Dignam JJ, Freidlin B. Assessing treatment benefit with competing risks not affected by the randomized treatment. Stat Med. 2015 Jan 30; 34(2):265-80. View in: PubMed

  40. Pollack A, Dignam JJ, Diaz DA, Wu Q, Stoyanova R, Bae K, Dicker AP, Sandler H, Hanks GE, Feng FY. A tissue biomarker-based model that identifies patients with a high risk of distant metastasis and differential survival by length of androgen deprivation therapy in RTOG protocol 92-02. Clin Cancer Res. 2014 Dec 15; 20(24):6379-88. View in: PubMed

  41. Han B, Yu M, Dignam JJ, Rathouz PJ. Bayesian approach for flexible modeling of semicompeting risks data. Stat Med. 2014 Dec 20; 33(29):5111-25. View in: PubMed

  42. Lee M, Dignam JJ, Han J. Multiple imputation methods for nonparametric inference on cumulative incidence with missing cause of failure. Stat Med. 2014 Nov 20; 33(26):4605-26. View in: PubMed

  43. Sène M, Taylor JM, Dignam JJ, Jacqmin-Gadda H, Proust-Lima C. Individualized dynamic prediction of prostate cancer recurrence with and without the initiation of a second treatment: Development and validation. Stat Methods Med Res. 2016 12; 25(6):2972-2991. View in: PubMed

  44. Gilbert MR, Dignam J, Pugh S, Armstrong TS, Wefel JS, Aldape K, Stupp R, Hegi M, Won M, Curran WJ, Mehta MP. Reply to M.C. Chamberlain. J Clin Oncol. 2014 May 20; 32(15):1634-5. View in: PubMed

  45. Gilbert MR, Dignam JJ, Armstrong TS, Wefel JS, Blumenthal DT, Vogelbaum MA, Colman H, Chakravarti A, Pugh S, Won M, Jeraj R, Brown PD, Jaeckle KA, Schiff D, Stieber VW, Brachman DG, Werner-Wasik M, Tremont-Lukats IW, Sulman EP, Aldape KD, Curran WJ, Mehta MP. A randomized trial of bevacizumab for newly diagnosed glioblastoma. N Engl J Med. 2014 Feb 20; 370(8):699-708. View in: PubMed

  46. Hou N, Hong S, Wang W, Olopade OI, Dignam JJ, Huo D. Hormone replacement therapy and breast cancer: heterogeneous risks by race, weight, and breast density. J Natl Cancer Inst. 2013 Sep 18; 105(18):1365-72. View in: PubMed

  47. Argos M, Rahman M, Parvez F, Dignam J, Islam T, Quasem I, K Hore S, T Haider A, Hossain Z, I Patwary T, Rakibuz-Zaman M, Sarwar G, La Porte P, Harjes J, Anton K, Kibriya MG, Jasmine F, Khan R, Kamal M, Shea CR, Yunus M, Baron JA, Ahsan H. Baseline comorbidities in a skin cancer prevention trial in Bangladesh. Eur J Clin Invest. 2013 Jun; 43(6):579-88. View in: PubMed

  48. Labby ZE, Armato SG, Dignam JJ, Straus C, Kindler HL, Nowak AK. Lung volume measurements as a surrogate marker for patient response in malignant pleural mesothelioma. J Thorac Oncol. 2013 Apr; 8(4):478-86. View in: PubMed

  49. Lawrence YR, Vikram B, Dignam JJ, Chakravarti A, Machtay M, Freidlin B, Takebe N, Curran WJ, Bentzen SM, Okunieff P, Coleman CN, Dicker AP. NCI-RTOG translational program strategic guidelines for the early-stage development of radiosensitizers. J Natl Cancer Inst. 2013 Jan 02; 105(1):11-24. View in: PubMed

  50. Wang M, Dignam JJ, Zhang QE, DeGroot JF, Mehta MP, Hunsberger S. Integrated phase II/III clinical trials in oncology: a case study. Clin Trials. 2012 Dec; 9(6):741-7. View in: PubMed

  51. Labby ZE, Nowak AK, Dignam JJ, Straus C, Kindler HL, Armato SG. Disease volumes as a marker for patient response in malignant pleural mesothelioma. Ann Oncol. 2013 Apr; 24(4):999-1005. View in: PubMed

  52. Labby ZE, Armato SG, Kindler HL, Dignam JJ, Hasani A, Nowak AK. Optimization of response classification criteria for patients with malignant pleural mesothelioma. J Thorac Oncol. 2012 Nov; 7(11):1728-34. View in: PubMed

  53. Mamounas EP, Anderson SJ, Dignam JJ, Bear HD, Julian TB, Geyer CE, Taghian A, Wickerham DL, Wolmark N. Predictors of locoregional recurrence after neoadjuvant chemotherapy: results from combined analysis of National Surgical Adjuvant Breast and Bowel Project B-18 and B-27. J Clin Oncol. 2012 Nov 10; 30(32):3960-6. View in: PubMed

  54. Barnholtz-Sloan JS, Yu C, Sloan AE, Vengoechea J, Wang M, Dignam JJ, Vogelbaum MA, Sperduto PW, Mehta MP, Machtay M, Kattan MW. A nomogram for individualized estimation of survival among patients with brain metastasis. Neuro Oncol. 2012 Jul; 14(7):910-8. View in: PubMed

  55. Griggs JJ, Mangu PB, Anderson H, Balaban EP, Dignam JJ, Hryniuk WM, Morrison VA, Pini TM, Runowicz CD, Rosner GL, Shayne M, Sparreboom A, Sucheston LE, Lyman GH. Appropriate chemotherapy dosing for obese adult patients with cancer: American Society of Clinical Oncology clinical practice guideline. J Clin Oncol. 2012 May 01; 30(13):1553-61. View in: PubMed

  56. Dookeran KA, Dignam JJ, Holloway N, Ferrer K, Sekosan M, McCaskill-Stevens W, Gehlert S. Race and the prognostic influence of p53 in women with breast cancer. Ann Surg Oncol. 2012 Jul; 19(7):2334-44. View in: PubMed

  57. Bekelman JE, Deye JA, Vikram B, Bentzen SM, Bruner D, Curran WJ, Dignam J, Efstathiou JA, FitzGerald TJ, Hurkmans C, Ibbott GS, Lee JJ, Merchant TE, Michalski J, Palta JR, Simon R, Ten Haken RK, Timmerman R, Tunis S, Coleman CN, Purdy J. Redesigning radiotherapy quality assurance: opportunities to develop an efficient, evidence-based system to support clinical trials--report of the National Cancer Institute Work Group on Radiotherapy Quality Assurance. Int J Radiat Oncol Biol Phys. 2012 Jul 01; 83(3):782-90. View in: PubMed

  58. Ferguson MK, Dignam JJ, Siddique J, Vigneswaran WT, Celauro AD. Diffusing capacity predicts long-term survival after lung resection for cancer. Eur J Cardiothorac Surg. 2012 May; 41(5):e81-6. View in: PubMed

  59. Dignam JJ, Zhang Q, Kocherginsky M. The use and interpretation of competing risks regression models. Clin Cancer Res. 2012 Apr 15; 18(8):2301-8. View in: PubMed

  60. Lee M, Cronin KA, Gail MH, Dignam JJ, Feuer EJ. Multiple imputation methods for inference on cumulative incidence with missing cause of failure. Biom J. 2011 Nov; 53(6):974-93. View in: PubMed

  61. Dignam JJ. Some additional thoughts on time-varying treatment effects in breast cancer. J Clin Oncol. 2011 Nov 20; 29(33):4469-70; author reply 4470. View in: PubMed

  62. Yothers G, Sargent DJ, Wolmark N, Goldberg RM, O'Connell MJ, Benedetti JK, Saltz LB, Dignam JJ, Blackstock AW. Outcomes among black patients with stage II and III colon cancer receiving chemotherapy: an analysis of ACCENT adjuvant trials. J Natl Cancer Inst. 2011 Oct 19; 103(20):1498-506. View in: PubMed

  63. Bae K, Bruner DW, Baek S, Movsas B, Corn BW, Dignam JJ. Patterns of missing mini mental status exam (MMSE) in radiation therapy oncology group (RTOG) brain cancer trials. J Neurooncol. 2011 Nov; 105(2):383-95. View in: PubMed

  64. Dukic V, Dignam J. Bayesian Hierarchical Multiresolution Hazard Model for the Study of Time-Dependent Failure Patterns in Early Stage Breast Cancer. Bayesian Anal. 2007 May 17; 2(3):591-610. View in: PubMed

  65. Wapnir IL, Dignam JJ, Fisher B, Mamounas EP, Anderson SJ, Julian TB, Land SR, Margolese RG, Swain SM, Costantino JP, Wolmark N. Long-term outcomes of invasive ipsilateral breast tumor recurrences after lumpectomy in NSABP B-17 and B-24 randomized clinical trials for DCIS. J Natl Cancer Inst. 2011 Mar 16; 103(6):478-88. View in: PubMed

  66. Chung CH, Dignam JJ, Hammond ME, Klimowicz AC, Petrillo SK, Magliocco A, Jordan R, Trotti A, Spencer S, Cooper JS, Le QT, Ang KK. Glioma-associated oncogene family zinc finger 1 expression and metastasis in patients with head and neck squamous cell carcinoma treated with radiation therapy (RTOG 9003). J Clin Oncol. 2011 Apr 01; 29(10):1326-34. View in: PubMed

  67. Cohen EE, Haraf DJ, Kunnavakkam R, Stenson KM, Blair EA, Brockstein B, Lester EP, Salama JK, Dekker A, Williams R, Witt ME, Grushko TA, Dignam JJ, Lingen MW, Olopade OI, Vokes EE. Epidermal growth factor receptor inhibitor gefitinib added to chemoradiotherapy in locally advanced head and neck cancer. J Clin Oncol. 2010 Jul 10; 28(20):3336-43. View in: PubMed

  68. Zamboni BA, Yothers G, Choi M, Fuller CD, Dignam JJ, Raich PC, Thomas CR, O'Connell MJ, Wolmark N, Wang SJ. Conditional survival and the choice of conditioning set for patients with colon cancer: an analysis of NSABP trials C-03 through C-07. J Clin Oncol. 2010 May 20; 28(15):2544-8. View in: PubMed

  69. Huang L, Johnson KA, Mariotto AB, Dignam JJ, Feuer EJ. Population-based survival-cure analysis of ER-negative breast cancer. Breast Cancer Res Treat. 2010 Aug; 123(1):257-64. View in: PubMed

  70. Dignam JJ. Re: Racial disparities in cancer survival among randomized clinical trials of the Southwest Oncology Group. J Natl Cancer Inst. 2010 Feb 24; 102(4):279-80; author reply 280-2. View in: PubMed

  71. Dookeran KA, Dignam JJ, Ferrer K, Sekosan M, McCaskill-Stevens W, Gehlert S. p53 as a marker of prognosis in African-American women with breast cancer. Ann Surg Oncol. 2010 May; 17(5):1398-405. View in: PubMed

  72. Mell LK, Dignam JJ, Salama JK, Cohen EE, Polite BN, Dandekar V, Bhate AD, Witt ME, Haraf DJ, Mittal BB, Vokes EE, Weichselbaum RR. Predictors of competing mortality in advanced head and neck cancer. J Clin Oncol. 2010 Jan 01; 28(1):15-20. View in: PubMed

  73. Huo D, Ikpatt F, Khramtsov A, Dangou JM, Nanda R, Dignam J, Zhang B, Grushko T, Zhang C, Oluwasola O, Malaka D, Malami S, Odetunde A, Adeoye AO, Iyare F, Falusi A, Perou CM, Olopade OI. Population differences in breast cancer: survey in indigenous African women reveals over-representation of triple-negative breast cancer. J Clin Oncol. 2009 Sep 20; 27(27):4515-21. View in: PubMed

  74. Dignam JJ, Huang L, Ries L, Reichman M, Mariotto A, Feuer E. Estimating breast cancer-specific and other-cause mortality in clinical trial and population-based cancer registry cohorts. Cancer. 2009 Nov 15; 115(22):5272-83. View in: PubMed

  75. Anderson SJ, Wapnir I, Dignam JJ, Fisher B, Mamounas EP, Jeong JH, Geyer CE, Wickerham DL, Costantino JP, Wolmark N. Prognosis after ipsilateral breast tumor recurrence and locoregional recurrences in patients treated by breast-conserving therapy in five National Surgical Adjuvant Breast and Bowel Project protocols of node-negative breast cancer. J Clin Oncol. 2009 May 20; 27(15):2466-73. View in: PubMed

  76. Dignam JJ, Dukic V, Anderson SJ, Mamounas EP, Wickerham DL, Wolmark N. Hazard of recurrence and adjuvant treatment effects over time in lymph node-negative breast cancer. Breast Cancer Res Treat. 2009 Aug; 116(3):595-602. View in: PubMed

  77. Dignam JJ, Kocherginsky MN. Choice and interpretation of statistical tests used when competing risks are present. J Clin Oncol. 2008 Aug 20; 26(24):4027-34. View in: PubMed

  78. Hall MJ, Dignam JJ, Olopade OI. Family history of pancreatic cancer in a high-risk cancer clinic: implications for risk assessment. J Genet Couns. 2008 Aug; 17(4):365-72. View in: PubMed

  79. Dignam JJ, Dukic VM. Comments on: Yin W, Di G, Zhou L, Lu J, Liu G, Wu J, Shen K, Han Q, Shen Z, Shao Z. Time-varying pattern of recurrence risk for Chinese breast cancer patients. Breast Cancer Res Treat. 2009 Jul; 116(1):209-10. View in: PubMed

  80. Bradbury AR, Ibe CN, Dignam JJ, Cummings SA, Verp M, White MA, Artioli G, Dudlicek L, Olopade OI. Uptake and timing of bilateral prophylactic salpingo-oophorectomy among BRCA1 and BRCA2 mutation carriers. Genet Med. 2008 Mar; 10(3):161-166. View in: PubMed

  81. Wei M, Xu J, Dignam J, Nanda R, Sveen L, Fackenthal J, Grushko TA, Olopade OI. Estrogen receptor alpha, BRCA1, and FANCF promoter methylation occur in distinct subsets of sporadic breast cancers. Breast Cancer Res Treat. 2008 Sep; 111(1):113-20. View in: PubMed

  82. Bradbury AR, Dignam JJ, Ibe CN, Auh SL, Hlubocky FJ, Cummings SA, White M, Olopade OI, Daugherty CK. How often do BRCA mutation carriers tell their young children of the family's risk for cancer? A study of parental disclosure of BRCA mutations to minors and young adults. J Clin Oncol. 2007 Aug 20; 25(24):3705-11. View in: PubMed

  83. Mohile SG, Bylow K, Dale W, Dignam J, Martin K, Petrylak DP, Stadler WM, Rodin M. A pilot study of the vulnerable elders survey-13 compared with the comprehensive geriatric assessment for identifying disability in older patients with prostate cancer who receive androgen ablation. Cancer. 2007 Feb 15; 109(4):802-10. View in: PubMed

  84. Dignam JJ, Polite BN, Yothers G, Raich P, Colangelo L, O'Connell MJ, Wolmark N. Body mass index and outcomes in patients who receive adjuvant chemotherapy for colon cancer. J Natl Cancer Inst. 2006 Nov 15; 98(22):1647-54. View in: PubMed

  85. Dignam JJ, Wieand K, Rathouz PJ. A missing data approach to semi-competing risks problems. Stat Med. 2007 Feb 20; 26(4):837-56. View in: PubMed

  86. Polite BN, Dignam JJ, Olopade OI. Colorectal cancer model of health disparities: understanding mortality differences in minority populations. J Clin Oncol. 2006 May 10; 24(14):2179-87. View in: PubMed

  87. Dignam JJ. The ongoing search for the sources of the breast cancer survival disparity. J Clin Oncol. 2006 Mar 20; 24(9):1326-8. View in: PubMed

  88. Dignam JJ, Wieand K, Johnson KA, Raich P, Anderson SJ, Somkin C, Wickerham DL. Effects of obesity and race on prognosis in lymph node-negative, estrogen receptor-negative breast cancer. Breast Cancer Res Treat. 2006 Jun; 97(3):245-54. View in: PubMed

  89. Wei M, Grushko TA, Dignam J, Hagos F, Nanda R, Sveen L, Xu J, Fackenthal J, Tretiakova M, Das S, Olopade OI. BRCA1 promoter methylation in sporadic breast cancer is associated with reduced BRCA1 copy number and chromosome 17 aneusomy. Cancer Res. 2005 Dec 01; 65(23):10692-9. View in: PubMed

  90. Dignam JJ. Early viewing of noninferiority trials in progress. J Clin Oncol. 2005 Aug 20; 23(24):5461-3. View in: PubMed

  91. Mandelblatt JS, Schechter CB, Yabroff KR, Lawrence W, Dignam J, Extermann M, Fox S, Orosz G, Silliman R, Cullen J, Balducci L. Toward optimal screening strategies for older women. Costs, benefits, and harms of breast cancer screening by age, biology, and health status. J Gen Intern Med. 2005 Jun; 20(6):487-96. View in: PubMed

  92. Polite BN, Dignam JJ, Olopade OI. Colorectal cancer and race: understanding the differences in outcomes between African Americans and whites. Med Clin North Am. 2005 Jul; 89(4):771-93. View in: PubMed

  93. Habel LA, Dignam JJ, Land SR, Salane M, Capra AM, Julian TB. Mammographic density and breast cancer after ductal carcinoma in situ. J Natl Cancer Inst. 2004 Oct 06; 96(19):1467-72. View in: PubMed

  94. Fisher B, Jeong JH, Bryant J, Anderson S, Dignam J, Fisher ER, Wolmark N. Treatment of lymph-node-negative, oestrogen-receptor-positive breast cancer: long-term findings from National Surgical Adjuvant Breast and Bowel Project randomised clinical trials. Lancet. 2004 Sep 4-10; 364(9437):858-68. View in: PubMed

  95. Medved M, Karczmar G, Yang C, Dignam J, Gajewski TF, Kindler H, Vokes E, MacEneany P, Mitchell MT, Stadler WM. Semiquantitative analysis of dynamic contrast enhanced MRI in cancer patients: Variability and changes in tumor tissue over time. J Magn Reson Imaging. 2004 Jul; 20(1):122-8. View in: PubMed

  96. Mandelblatt JS, Schechter CB, Yabroff KR, Lawrence W, Dignam J, Muennig P, Chavez Y, Cullen J, Fahs M. Benefits and costs of interventions to improve breast cancer outcomes in African American women. J Clin Oncol. 2004 Jul 01; 22(13):2554-66. View in: PubMed

  97. Dignam JJ, Mamounas EP. Obesity and breast cancer prognosis: an expanding body of evidence. Ann Oncol. 2004 Jun; 15(6):850-1. View in: PubMed

  98. Bryant J, Dignam JJ. Semiparametric models for cumulative incidence functions. Biometrics. 2004 Mar; 60(1):182-90. View in: PubMed

  99. Wu TH, Pabin CN, Qin Z, Blankenstein T, Philip M, Dignam J, Schreiber K, Schreiber H. Long-term suppression of tumor growth by TNF requires a Stat1- and IFN regulatory factor 1-dependent IFN-gamma pathway but not IL-12 or IL-18. J Immunol. 2004 Mar 01; 172(5):3243-51. View in: PubMed

  100. Grushko TA, Dignam JJ, Das S, Blackwood AM, Perou CM, Ridderstråle KK, Anderson KN, Wei MJ, Adams AJ, Hagos FG, Sveen L, Lynch HT, Weber BL, Olopade OI. MYC is amplified in BRCA1-associated breast cancers. Clin Cancer Res. 2004 Jan 15; 10(2):499-507. View in: PubMed

  101. Dignam JJ. The role of cancer cooperative groups within the spectrum of cancer care. Cancer Control. 2004 Jan-Feb; 11(1):55-63. View in: PubMed

  102. Dignam JJ, Wieand K, Johnson KA, Fisher B, Xu L, Mamounas EP. Obesity, tamoxifen use, and outcomes in women with estrogen receptor-positive early-stage breast cancer. J Natl Cancer Inst. 2003 Oct 01; 95(19):1467-76. View in: PubMed

  103. Lamont EB, Hayreh D, Pickett KE, Dignam JJ, List MA, Stenson KM, Haraf DJ, Brockstein BE, Sellergren SA, Vokes EE. Is patient travel distance associated with survival on phase II clinical trials in oncology? J Natl Cancer Inst. 2003 Sep 17; 95(18):1370-5. View in: PubMed

  104. Dignam JJ, Ye Y, Colangelo L, Smith R, Mamounas EP, Wieand HS, Wolmark N. Prognosis after rectal cancer in blacks and whites participating in adjuvant therapy randomized trials. J Clin Oncol. 2003 Feb 01; 21(3):413-20. View in: PubMed

  105. Fisher B, Bryant J, Dignam JJ, Wickerham DL, Mamounas EP, Fisher ER, Margolese RG, Nesbitt L, Paik S, Pisansky TM, Wolmark N. Tamoxifen, radiation therapy, or both for prevention of ipsilateral breast tumor recurrence after lumpectomy in women with invasive breast cancers of one centimeter or less. J Clin Oncol. 2002 Oct 15; 20(20):4141-9. View in: PubMed

  106. Dignam J, Bryant J, Paik S. Statistical considerations in assessing molecular markers for cancer prognosis and treatment efficacy. Methods Mol Biol. 2002; 184:169-89. View in: PubMed

  107. Fisher B, Jeong JH, Dignam J, Anderson S, Mamounas E, Wickerham DL, Wolmark N. Findings from recent National Surgical Adjuvant Breast and Bowel Project adjuvant studies in stage I breast cancer. J Natl Cancer Inst Monogr. 2001; (30):62-6. View in: PubMed

  108. Dignam JJ. Efficacy of systemic adjuvant therapy for breast cancer in African-American and Caucasian women. J Natl Cancer Inst Monogr. 2001; (30):36-43. View in: PubMed

  109. Fisher B, Land S, Mamounas E, Dignam J, Fisher ER, Wolmark N. Prevention of invasive breast cancer in women with ductal carcinoma in situ: an update of the National Surgical Adjuvant Breast and Bowel Project experience. Semin Oncol. 2001 Aug; 28(4):400-18. View in: PubMed

  110. Fisher B, Dignam J, Bryant J, Wolmark N. Five versus more than five years of tamoxifen for lymph node-negative breast cancer: updated findings from the National Surgical Adjuvant Breast and Bowel Project B-14 randomized trial. J Natl Cancer Inst. 2001 May 02; 93(9):684-90. View in: PubMed

  111. Fisher B, Dignam J, Tan-Chiu E, Anderson S, Fisher ER, Wittliff JL, Wolmark N. Prognosis and treatment of patients with breast tumors of one centimeter or less and negative axillary lymph nodes. J Natl Cancer Inst. 2001 Jan 17; 93(2):112-20. View in: PubMed

  112. Dignam JJ. Differences in breast cancer prognosis among African-American and Caucasian women. CA Cancer J Clin. 2000 Jan-Feb; 50(1):50-64. View in: PubMed

  113. Dignam JJ, Fisher B. Occurrence of stroke with tamoxifen in NSABP B-24. Lancet. 2000 Mar 04; 355(9206):848-9. View in: PubMed

  114. Dignam JJ, Colangelo L, Tian W, Jones J, Smith R, Wickerham DL, Wolmark N. Outcomes among African-Americans and Caucasians in colon cancer adjuvant therapy trials: findings from the National Surgical Adjuvant Breast and Bowel Project. J Natl Cancer Inst. 1999 Nov 17; 91(22):1933-40. View in: PubMed

  115. Fisher ER, Dignam J, Tan-Chiu E, Costantino J, Fisher B, Paik S, Wolmark N. Pathologic findings from the National Surgical Adjuvant Breast Project (NSABP) eight-year update of Protocol B-17: intraductal carcinoma. Cancer. 1999 Aug 01; 86(3):429-38. View in: PubMed

  116. Fisher B, Dignam J, Wolmark N, Wickerham DL, Fisher ER, Mamounas E, Smith R, Begovic M, Dimitrov NV, Margolese RG, Kardinal CG, Kavanah MT, Fehrenbacher L, Oishi RH. Tamoxifen in treatment of intraductal breast cancer: National Surgical Adjuvant Breast and Bowel Project B-24 randomised controlled trial. Lancet. 1999 Jun 12; 353(9169):1993-2000. View in: PubMed

  117. Dignam JJ, Bryant J, Wieand HS, Fisher B, Wolmark N. Early stopping of a clinical trial when there is evidence of no treatment benefit: protocol B-14 of the National Surgical Adjuvant Breast and Bowel Project. Control Clin Trials. 1998 Dec; 19(6):575-88. View in: PubMed

  118. Fisher B, Dignam J, Wolmark N, Mamounas E, Costantino J, Poller W, Fisher ER, Wickerham DL, Deutsch M, Margolese R, Dimitrov N, Kavanah M. Lumpectomy and radiation therapy for the treatment of intraductal breast cancer: findings from National Surgical Adjuvant Breast and Bowel Project B-17. J Clin Oncol. 1998 Feb; 16(2):441-52. View in: PubMed

  119. Fisher B, Dignam J, Wolmark N, DeCillis A, Emir B, Wickerham DL, Bryant J, Dimitrov NV, Abramson N, Atkins JN, Shibata H, Deschenes L, Margolese RG. Tamoxifen and chemotherapy for lymph node-negative, estrogen receptor-positive breast cancer. J Natl Cancer Inst. 1997 Nov 19; 89(22):1673-82. View in: PubMed

  120. Dignam JJ, Redmond CK, Fisher B, Costantino JP, Edwards BK. Prognosis among African-American women and white women with lymph node negative breast carcinoma: findings from two randomized clinical trials of the National Surgical Adjuvant Breast and Bowel Project (NSABP). Cancer. 1997 Jul 01; 80(1):80-90. View in: PubMed

  121. Costantino JP, Kuller LH, Ives DG, Fisher B, Dignam J. Coronary heart disease mortality and adjuvant tamoxifen therapy. J Natl Cancer Inst. 1997 Jun 04; 89(11):776-82. View in: PubMed

  122. Fisher B, Dignam J, Bryant J, DeCillis A, Wickerham DL, Wolmark N, Costantino J, Redmond C, Fisher ER, Bowman DM, Deschênes L, Dimitrov NV, Margolese RG, Robidoux A, Shibata H, Terz J, Paterson AH, Feldman MI, Farrar W, Evans J, Lickley HL. Five versus more than five years of tamoxifen therapy for breast cancer patients with negative lymph nodes and estrogen receptor-positive tumors. J Natl Cancer Inst. 1996 Nov 06; 88(21):1529-42. View in: PubMed

  123. Fisher B, Dignam J, Mamounas EP, Costantino JP, Wickerham DL, Redmond C, Wolmark N, Dimitrov NV, Bowman DM, Glass AG, Atkins JN, Abramson N, Sutherland CM, Aron BS, Margolese RG. Sequential methotrexate and fluorouracil for the treatment of node-negative breast cancer patients with estrogen receptor-negative tumors: eight-year results from National Surgical Adjuvant Breast and Bowel Project (NSABP) B-13 and first report of findings from NSABP B-19 comparing methotrexate and fluorouracil with conventional cyclophosphamide, methotrexate, and fluorouracil. J Clin Oncol. 1996 Jul; 14(7):1982-92. View in: PubMed

  124. Dignam JJ, Weissfeld LA, Anderson SJ. Methods for bounding the marginal survival distribution. Stat Med. 1995 Sep 30; 14(18):1985-98. View in: PubMed

  125. Anderson SJ, Costantino JP, Brown AM, Bryant JL, Cronin WM, Dignam JJ, Jones JM, Rockette HE, Wieand S. Breast cancer trials on trial: a case of conflicting ethical interests. Cancer. 1995 Oct 01; 76(7):1294-5. View in: PubMed