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John T. Farrar, M.D., Ph.D.
92Professor of Epidemiology in Biostatistics and Epidemiology at the Hospital of the University of Pennsylvania
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Member, University of Pennsylvania Cancer Center, Philadelphia, PA
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Clinical Associate, Department of Neurology, University of Pennsylvania, Philadelphia PA
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Senior Scholar, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia, PA
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Co-Director, Biostatistics Analysis Center, Biostatistical and Epidemiology Consulting Center, Center for Clinical Epidemiology and Biostatistics
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Co-Director, Master of Science in Clinical Epidemiology Program, University of Pennsylvania Perelman School of Medicine,
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Philadelphia, PA
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Department: Biostatistics and Epidemiology
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Contact information
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Room 816, Blockley Hall
3a 423 Guardian Drive
Philadelphia, PA 19104-6021
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3a 423 Guardian Drive
Philadelphia, PA 19104-6021
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Office: 215-898-5802
32 Fax: 215-573-5315
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32 Fax: 215-573-5315
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Graduate Group Affiliations
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Education:
21 9 ScB. 2c (Biology, Computer Science minor) c
29 Brown University, 1976.
21 9 M.D. c
47 The University of Rochester School of Medicine, 1981.
21 d M.S.C.E. 3f (Center for Clinical Epidemiology and Biostatistics) c
37 The University of Pennsylvania, 2000.
21 a Ph.D. 3c (Graduate Group - Biostatistics and Epidemiology) c
4a The University of Pennsylvania School of Medicine, 2004.
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21 9 ScB. 2c (Biology, Computer Science minor) c
29 Brown University, 1976.
21 9 M.D. c
47 The University of Rochester School of Medicine, 1981.
21 d M.S.C.E. 3f (Center for Clinical Epidemiology and Biostatistics) c
37 The University of Pennsylvania, 2000.
21 a Ph.D. 3c (Graduate Group - Biostatistics and Epidemiology) c
4a The University of Pennsylvania School of Medicine, 2004.
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Post-Graduate Training
24 6e Residency Program in Internal Medicine, Children's Hospital of San Francisco, CA, 1981-1983.
24 79 Residency Program in Neurology, The New York Hospital, Cornell Medical Center, New York, NY, 1984-1986.
24 76 Chief Resident in Neurology, The New York Hospital, Cornell Medical Center, New York, NY, 1986-1987.
24 8b Neuro-Oncology and Pain Fellow, Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, NY, 1987-1988.
24 b5 Fellowship in Clinical Epidemiology and Biostatistics, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia, PA, 1993-2000.
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24 6e Residency Program in Internal Medicine, Children's Hospital of San Francisco, CA, 1981-1983.
24 79 Residency Program in Neurology, The New York Hospital, Cornell Medical Center, New York, NY, 1984-1986.
24 76 Chief Resident in Neurology, The New York Hospital, Cornell Medical Center, New York, NY, 1986-1987.
24 8b Neuro-Oncology and Pain Fellow, Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, NY, 1987-1988.
24 b5 Fellowship in Clinical Epidemiology and Biostatistics, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia, PA, 1993-2000.
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Certifications
28 58 American Board of Psychiatry and Neurology (Recertified - 2019), 1995.
28 79 Subspecialty in Pain Medicine, American Board of Psychiatry and Neurology (Recertified – 2014), 2004.
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Permanent link28 58 American Board of Psychiatry and Neurology (Recertified - 2019), 1995.
28 79 Subspecialty in Pain Medicine, American Board of Psychiatry and Neurology (Recertified – 2014), 2004.
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Description of Research Expertise
1e6 Research related to pain including the use of new pain medications, brain function in people with pain, complementary and alternative therapies, and new methodologies for understanding how patients report their pain in clinical trials. Current research includes ongoing studies of acupuncture for the treatment of pain in osteo-arthritis patients and chronic fatigue in cancer patients, brain imaging of patients with pain, and studies of cancer treatment related pain.65
Description of Clinical Expertise
10a Focuses on all aspects of pain and symptom therapy in cancer patients as a member of the Symptom and Palliative Care Team and as a collaborator in the development of a multi-disciplinary program for the evaluation and treatment of patients with pain.1a 29
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13a Miller CJ, Farrar JT: Methodology for Determining Minimally Clinically Important Differences in Acute Pain Intensity with the Double Stopwatch Technique. The Journal of Pain May 2025 Notes: doi: 10.1016/j.jpain.2024.104759. Epub 2024 Dec 15.
104 Howard SD, Singh S, Macaluso D, Hsu JY, Cajigas I, Qiu L, Halpern CH, Aamodt WW, Farrar JT: Correlation of the Clinical Rating Scale for Tremor with a Global Assessment. Clinical Neurology and Neurosurgery 5b Feb 2025 Notes: doi: 10.1016/j.clineuro.2024.108710. Epub 2024 Dec 24.
15b Aamodt WW, Sun C, Dahodwala N, Elser H, Schneider ALC, Farrar JT, Coe NB, Willis AW: End-of-Life Health Care Service Use and Cost Among Medicare Decedents with Neurodegenerative Diseases. Neurology 103(9), Nov 2024 Notes: doi: 10.1212/WNL.0000000000209925. Epub 2024 Oct 11.
284 Farrar JT, Locke KT Jr, Clemens JQ, Griffith JW, Harte SE, Kirkali Z, Kreder KJ, Krieger JN, Lai HH, Moldwin RM, Mullins C, Naliboff BD, Pontari MA, Rodríguez LV, Schaeffer AJ, Schrepf A, Stephens-Shields A, Sutcliffe S, Taple BJ, Williams DA, Landis JR: Widespread Pain Phenotypes Impact Treatment Efficacy Results in Randomized Clinical Trials for Interstitial Cystitis/Bladder Pain Syndrome: a Multidisciplinary Approach to the Study of Chronic Pelvic Pain Network Study. Pain 166(5): 1179-1190, May 2025 Notes: doi: 10.1097/j.pain.0000000000003455. Epub 2025 Feb 18.
248 Hohenschurz-Schmidt D, Cherkin D, Rice ASC, Dworkin RH, Turk DC, McDermott MP, Bair MJ, DeBar LL, Edwards RR, Evans SR, Farrar JT, Kerns RD, Rowbotham MC, Wasan AD, Cowan P, Ferguson M, Freeman R, Gewandter JS, Gilron I, Grol-Prokopczyk H, Iyengar S, Kamp C, Karp BI, Kleykamp BA, Loeser JD, Mackey S, Malamut R, McNicol E, Patel KV, Schmader K, Simon L, Steiner DJ, Veasley C, Vollert J.: Methods for Pragmatic Randomized Clinical Trials of Pain Therapies: IMMPACT Statement. Pain 165(10): 2165-2183, Oct 2024.
14f Howard SD, Singh S, Macaluso D, Cajigas I, Aamodt WW, Farrar JT.: Validation of the International Classification of Diseases, Tenth Revision-Clinical Modification Diagnostic Code for Essential Tremor. Tremor and Other Hyperkinetic Movements 14(1): 1-8, Jul 2024.
2ce Haroutounian S, Holzer KJ, Kerns RD, Veasley C, Dworkin RH, Turk DC, Carman KL, Chambers CT, Cowan P, Edwards RR, Eisenach JC, Farrar JT, Ferguson M, Forsythe LP, Freeman R, Gewandter JS, Gilron I, Goertz C, Grol-Prokopczyk H, Iyengar S, Jordan I, Kamp C, Kleykamp BA, Knowles RL, Langford DJ, Mackey S, Malamut R, Markman J, Martin KR, McNicol E, Patel KV, Rice ASC, Rowbotham M, Sandbrink F, Simon LS, Steiner DJ, Vollert J: Patient Engagement in Designing, Conducting, and Disseminating Clinical Pain Research: IMMPACT Recommended Considerations. Pain 165(5): 1013-1028, May 2024 Notes: doi: 10.1097/j.pain.0000000000003121. Epub 2023 Dec 19.
1be Clemens JQ, Locke K Jr, Landis JR, Kreder K, Rodriguez LV, Yang CC, Tu FF, Harte SE, Schrepf A, Farrar JT, Sutcliffe S, Naliboff BD, Williams DA, Afari N, Spitznagle T, Taple BJ, Lai HH: Validation of a Simple Body Map to Measure Widespread Pain in Urologic Chronic Pelvic Pain Syndrome: A MAPP Research Network Study. Neurourology and Urodynamics 43(3): 727-737, Mar 2024.
1f0 Brown VL, James A, Hunleth J, Bradley CS, Farrar JT, Gupta P, Lai HH, Lowder JL, Moldwin R, Rodriguez LV, Yang CC, Sutcliffe S: Believing Women: A Qualitative Exploration of Provider Disbelief and Pain Dismissal Among Women with Interstitial Cystitis/Bladder Pain Syndrome from the MAPP Research Network. International Urogynecology Journal 35(1): 139-148, Jan 2024 Notes: doi: 10.1007/s00192-023-05677-0. Epub 2023 Nov 22.
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Selected Publications
151 Sayegh RR, Vitale S, Agrón E, Farrar JT, Asbell PA, Chew EY; AREDS Research Group: Prevalence and Risk Factors for the Development of Chronic Postoperative Pain After Cataract Surgery in the Age-Related Eye Disease Study (AREDS). The Journal of Pain 28, Jan 2025.13a Miller CJ, Farrar JT: Methodology for Determining Minimally Clinically Important Differences in Acute Pain Intensity with the Double Stopwatch Technique. The Journal of Pain May 2025 Notes: doi: 10.1016/j.jpain.2024.104759. Epub 2024 Dec 15.
104 Howard SD, Singh S, Macaluso D, Hsu JY, Cajigas I, Qiu L, Halpern CH, Aamodt WW, Farrar JT: Correlation of the Clinical Rating Scale for Tremor with a Global Assessment. Clinical Neurology and Neurosurgery 5b Feb 2025 Notes: doi: 10.1016/j.clineuro.2024.108710. Epub 2024 Dec 24.
15b Aamodt WW, Sun C, Dahodwala N, Elser H, Schneider ALC, Farrar JT, Coe NB, Willis AW: End-of-Life Health Care Service Use and Cost Among Medicare Decedents with Neurodegenerative Diseases. Neurology 103(9), Nov 2024 Notes: doi: 10.1212/WNL.0000000000209925. Epub 2024 Oct 11.
284 Farrar JT, Locke KT Jr, Clemens JQ, Griffith JW, Harte SE, Kirkali Z, Kreder KJ, Krieger JN, Lai HH, Moldwin RM, Mullins C, Naliboff BD, Pontari MA, Rodríguez LV, Schaeffer AJ, Schrepf A, Stephens-Shields A, Sutcliffe S, Taple BJ, Williams DA, Landis JR: Widespread Pain Phenotypes Impact Treatment Efficacy Results in Randomized Clinical Trials for Interstitial Cystitis/Bladder Pain Syndrome: a Multidisciplinary Approach to the Study of Chronic Pelvic Pain Network Study. Pain 166(5): 1179-1190, May 2025 Notes: doi: 10.1097/j.pain.0000000000003455. Epub 2025 Feb 18.
248 Hohenschurz-Schmidt D, Cherkin D, Rice ASC, Dworkin RH, Turk DC, McDermott MP, Bair MJ, DeBar LL, Edwards RR, Evans SR, Farrar JT, Kerns RD, Rowbotham MC, Wasan AD, Cowan P, Ferguson M, Freeman R, Gewandter JS, Gilron I, Grol-Prokopczyk H, Iyengar S, Kamp C, Karp BI, Kleykamp BA, Loeser JD, Mackey S, Malamut R, McNicol E, Patel KV, Schmader K, Simon L, Steiner DJ, Veasley C, Vollert J.: Methods for Pragmatic Randomized Clinical Trials of Pain Therapies: IMMPACT Statement. Pain 165(10): 2165-2183, Oct 2024.
14f Howard SD, Singh S, Macaluso D, Cajigas I, Aamodt WW, Farrar JT.: Validation of the International Classification of Diseases, Tenth Revision-Clinical Modification Diagnostic Code for Essential Tremor. Tremor and Other Hyperkinetic Movements 14(1): 1-8, Jul 2024.
2ce Haroutounian S, Holzer KJ, Kerns RD, Veasley C, Dworkin RH, Turk DC, Carman KL, Chambers CT, Cowan P, Edwards RR, Eisenach JC, Farrar JT, Ferguson M, Forsythe LP, Freeman R, Gewandter JS, Gilron I, Goertz C, Grol-Prokopczyk H, Iyengar S, Jordan I, Kamp C, Kleykamp BA, Knowles RL, Langford DJ, Mackey S, Malamut R, Markman J, Martin KR, McNicol E, Patel KV, Rice ASC, Rowbotham M, Sandbrink F, Simon LS, Steiner DJ, Vollert J: Patient Engagement in Designing, Conducting, and Disseminating Clinical Pain Research: IMMPACT Recommended Considerations. Pain 165(5): 1013-1028, May 2024 Notes: doi: 10.1097/j.pain.0000000000003121. Epub 2023 Dec 19.
1be Clemens JQ, Locke K Jr, Landis JR, Kreder K, Rodriguez LV, Yang CC, Tu FF, Harte SE, Schrepf A, Farrar JT, Sutcliffe S, Naliboff BD, Williams DA, Afari N, Spitznagle T, Taple BJ, Lai HH: Validation of a Simple Body Map to Measure Widespread Pain in Urologic Chronic Pelvic Pain Syndrome: A MAPP Research Network Study. Neurourology and Urodynamics 43(3): 727-737, Mar 2024.
1f0 Brown VL, James A, Hunleth J, Bradley CS, Farrar JT, Gupta P, Lai HH, Lowder JL, Moldwin R, Rodriguez LV, Yang CC, Sutcliffe S: Believing Women: A Qualitative Exploration of Provider Disbelief and Pain Dismissal Among Women with Interstitial Cystitis/Bladder Pain Syndrome from the MAPP Research Network. International Urogynecology Journal 35(1): 139-148, Jan 2024 Notes: doi: 10.1007/s00192-023-05677-0. Epub 2023 Nov 22.
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