Professor Epidemiology, Pediatrics and Medicine
University of Pittsburgh
Pittsburgh, PA 15261
Voice: 412-383-1032
FAX: 412-383-1020
E-mail: tjo@pitt.edu


Administrative Assistant
Gloria Curtis
3512 Fifth Avenue
University of Pittsburgh
Pittsburgh, PA 15213
Voice: 412-383-1032
FAX: 412-383-1020




Research Interests

• Diabetes and cardiovascular epidemiology, with particular emphasis on insulin-dependent diabetes and lipids, management of lipid disorders, diabetes prevention

Research Support

Principal Investigator


• Epidemiology of Diabetes Complications: Phase II (2004-2014) NIDDK
• Epidemiology of Diabetes Interventions and Complications (2006-2016) Case Western
• Diabetes Prevention Program Outcomes Study (2003-2014) NIDDK
• Evaluation of Differing Type 1 Diabetes Regimens in Youth in the Developing World (2010-2013) NIDDK

Co-Principal Investigator


• Oxidative Insults, Antioxidative Responses and Type 1 Diabetes (2009-2014) NIH
• Imaging Biomarkers of Accelerated Brain Aging in Type 1 Diabetes (2010-2014) NIDDK
• Diabetes Prevention Translation Project: the Healthy LIFESTYLE (2010-2014) NIDDK

Medical Director

• Department of Epidemiology/Medicine: Nutrition Lipid Program
• Department of Epidemiology/UPDI: Diabetes Prevention Support Center

Selected Publications (from past 6 years)

Cleary PA, Orchard TJ, Genuth S, Wong ND, Detrano R, Backlund J-YC, Zinman B, Jacobson A, Sun W, Lachin J, Nathan DM for the DCCT/EDIC Research Group. The Effect of Intensive Glycemic Treatment on Coronary Artery Calcification in Type 1 Diabetic Participants of the Diabetes Control and Complications Trial/Epidemiology of Diabetes Interventions and Complications (DCCT/EDIC Study). Diabetes 2006; 55: 3556-3565.

Costacou T, Zgibor JC, Evans RW, Tyurina YY, Kagan VE, Orchard TJ. Antioxidants and coronary artery disease among individuals with type 1 diabetes: Findings from the Pittsburgh Epidemiology of Diabetes Complications Study. Journal of Diabetes and its Complications 2006; 20: 387-394.

Costacou T, Chang YF, Ferrell RE, Orchard TJ. Identifying Genetic Susceptibilities to Diabetes-related Complications among Individuals at Low Risk of Complications: An Application of Tree-Structured Survival Analysis. Am J Epidemiol 2006; 164: 862-872.

Costacou T, Huskey ND, Edmundowicz D, Stolk R, Orchard TJ. Lower-extremity arterial calcification as a correlate of coronary artery calcification. Metabolism Clinical and Experimental 2006; 55: 1689-1696.

Walsh MG, Zgibor J, Borch-Johnsen K, Orchard TJ. A multinational assessment of complications in type 1 diabetes: the DiaMond substudy of complications (DiaComp) Level 1. Diabetes & Vascular Disease Research 2006; 3(2): 84-92.

Yu Y, Thorpe SR, Jenkins AJ, Shaw JN, Sochaski MA, McGee D, Aston CE, Orchard TJ, Silvers N, Peng YG, McKnight JA, Baynes JW, Lyons, TJ, The DCCT/EDIC Research Group. Advanced glycation end-products and methionine sulfoxide in skin collagen in Type 1 diabetes. Diabetologia 2006; 49: 2488-2498.

Orchard TJ, Costacou T., Kretowski A, Nesto RW. Type 1 Diabetes and Coronary Artery Disease. Diabetes Care 2006; 29(11): 2528-2538.

Pambianco G, Costacou T, Orchard TJ. The Prediction of Major Outcomes of Type 1 Diabetes: A 12 year prospective evaluation of three separate definitions of the metabolic syndrome and their components and estimated glucose disposal rate: The Pittsburgh Epidemiology of Diabetes Complications Study Experience. Diabetes Care 2007; 30(5): 1248-1254.

Prince CT, Becker DJ, Costacou T, Miller RG, Orchard TJ. Changes in glycaemic control and risk of coronary artery disease in type 1 diabetes mellitus: findings from the Pittsburgh Epidemiology of Diabetes Complications Study (EDC). Diabetologia 2007; 50: 2280-2288.

Costacou T, Ferrell R, Orchard TJ. Haptoglobin genotype: a determinant of cardiovascular complication risk in type 1 diabetes. Diabetes 2008; 57: 1702-1706.

The BARI 2D Study Group (Writing Group Member). A Randomized Trial of Therapies for Type 1 Diabetes and Coronary Artery Disease. N Engl J Med 2009; 360(24): 2503-2515.

Shay CM, Evans RW, Orchard TJ. Do plant sterol concentrations correlate with coronary artery disease in type 1 diabetes? A report from the Pittsburgh EDC Study. J Diabetes 2009; 1: 112-117.

Bilous R, Chaturvedi N, Sjølie AK, Fuller J, Klein R, Orchard T, Porta M, Parving H-H. Effect of candesartan on microalbuminuria and albumin excretion rate in diabetes: Three randomized trials. Ann Intern Med 2009; 151(1): 11-20.

Conway B, Evans R, Fried L, Kelsey S, Edmundowicz D, Orchard T. Free fatty acids are associated with pulse pressure in women, but not men, with T1D. Metabolism 2009; 58:1215-1221. PMCID: PMC2734480.

DCCT/EDIC Research Group, Nathan DM, Zinman B, Cleary PA, Backlund J-Y, Genuth S, Miller, R, Orchard TJ. Modern Day Clinical Course of Type 1 Diabetes Mellitus After 30 Years’ Duration: The DCCT/EDIC and Pittsburgh EDC Experience (1983-2005). Arch Intern Med 2009; 169(14): 1307-1316.

Conway B, Miller RG, Costacou T, Fried L, Kelsey S, Evans RW, Orchard TJ. Adiposity and mortality in type 1 diabetes. Int J Obes 2009; 33(7): 796-805. PMCID: PMC2755198.

Conway B, Costacou T, Orchard T. Is glycaemia or insulin dose the stronger risk factor for coronary artery disease (CAD) in type 1 diabetes? Diab Vasc Dis Res 2009; 6: 223-230.

Conway BN, Miller RG, Klein R, Orchard TJ. Prediction of proliferative diabetic retinopathy with hemoglobin level. Arch Ophthalmol 2009; 127(11): 1494-1499. PMCID: PMC2778312.

Vergouwe Y, Soedamah-Muthu SS, Zgibor J, Chaturvedi N, Forsblom C, Snell-Bergeon JK, Maahs DM, Groop P-H, Rewers M, Orchard TJ, Fuller JH, Moons KGM. Progression to microalbuminuria in T1DM: development and validation of a prediction rule. Diabetologia 2010; 53: 254-262. PMCID: PMC2797626.

Kramer MK, Kriska AM, Venditti EM, Miller RG, Brooks MM, Burke LE, Siminerio LM, Solano FX, Orchard TJ. Translating the Diabetes Prevention Program. A Comprehensive Model for Prevention Training and Program Delivery. Am J Prev Med 2009; 36(6): 505-511.

Costacou T, Ferrell RE, Orchard TJ. Haptoglobin genotype and renal function decline in type 1 diabetes. Diabetes 2009; 58(12): 2904-2909. PMCID: PMC2780877.

Miller RG, Costacou T, Orchard TJ. Lipoprotein-associated phospholipase A2, C-reactive protein, and coronary artery disease in individuals with type 1 diabetes and macroalbuminuria. Diab Vasc Dis Res 2010; 7(1): 47-55. PMCID: PMC2858394.

Conway BN, Miller RG, Orchard TJ. Are Hemoglobin Levels Elevated in Type 1 Diabetes? Diabetes Care 2010; 33(2): 341-343. PMCID: PMC2809278.

Orchard TJ, Costacou T. When Are Type 1 Diabetic Patients at Risk for Cardiovascular Disease? Curr Diab Rep 2010; 10: 48-54.

Prince CT, Secrest AM, Mackey RH, Arena VC, Kingsley LA, Orchard TA. Cardiovascular autonomic neuropathy, HDL cholesterol, and smoking correlate with arterial stiffness markers determined 18 years later in type 1 diabetes. Diabetes Care 2010; 33(3): 652-657. PMCID: PMC2827525

Conway B, Edmundowicz D, Matter N, Maynard J, Orchard T. Skin fluorescence correlates strongly with coronary artery calcification severity in type 1 diabetes. Diabetes Technol Ther 2010; 12(5): 339-345.

Conway B, Miller RG, Costacou T, Fried L, Kelsey S, Evans R, Orchard T. Temporal Patterns in Overweight and Obesity in Type 1 Diabetes. Diabet Med 2010; 27(4): 398-404.

Prince CT, Secrest AM, Mackey RH, Arena VC, Kingsley LA, Orchard TJ. Augmentation pressure and subendocardial viability ratio are associated with microalbuminuria and with poor renal function in type 1 diabetes. Diab Vasc Dis Res 2010; 7(3): 216-224. PMCID: PMC3047589 (available on 2011/7/6)

Smith KJ, Hsu HE, Roberts MS, Kramer MK, Orchard TJ, Piatt GA, Seidel MC, Zgibor JC, Bryce CL. Cost-effectiveness analysis of efforts to reduce risk of type 2 diabetes and cardiovascular disease in Southwestern Pennsylvania, 2005-2007. Prev Chronic Dis 2009; 7(5): A109. PMCID: PMC2938403.

Lloyd CE, Pambianco G, Orchard T. Does diabetes-related distress explain the presence of depressive symptoms or poor self-care in individuals with Type 1 diabetes? Diabet Med 2010; 27(2): 234-237. PMCID: PMC3093054.

Zgibor JC, Ruppert K, Orchard TJ, Sodamah-Muthu SS, Fuller J, Chaturvedi N, Roberts MS. Development of a coronary heart disease risk prediction model for type 1 diabetes: The Pittsburgh CHD in Type 1 Diabetes Risk Model. Diabetes Res Clin Pract 2010; 88(3): 314-321. PMCID: PMC2891292.

Shay CM, Secrest AM, Goodpaster BH, Kelsey SF, Strotmeyer ES, Orchard TJ. Regional Adiposity and Risk for Coronary Artery Disease in Type 1 Diabetes: Does Having Greater Amounts of Gluteal-Femoral Adiposity Lower the Risk? Diabetes Res Clin Pract 2010; 89(3): 288-295. PMCID: PMC2919619.

Orchard TJ, Secrest AM, Miller RG, Costacou T. In the absence of renal disease, 20-year mortality risk in type 1 diabetes is comparable to that of the generation population: a report from the Pittsburgh Epidemiology of Diabetes Complications Study. Diabetologia 2010; 53(11): 2312-2319.

Secrest AM, Becker DJ, Kelsey SF, LaPorte RE, Orchard TJ. Cause-specific mortality trends in a large population-based cohort with long-standing childhood-onset type 1 diabetes. Diabetes 2010; 59: 3216-3222. PMCID: PMC2992785.

Secrest AM, Becker DJ, Kelsey SF, Laporte RE, Orchard TJ. All-cause mortality trends in a large population-based cohort with long-standing childhood-onset type 1 diabetes. Diabetes Care 2010; 33(12): 2573-2579. PMCID: PMC2992193.

Prince CT, Secrest AM, Mackey RH, Arena VC, Kingsley LA, Orchard TJ. Pulse wave analysis and prevalent cardiovascular disease in type 1 diabetes. Atherosclerosis 2010; 213(2): 469-474. PMCID: PMC2997940 (available on 2011/12/1).

Kramer MK, Kriska AM, Venditti EM, Semler LN, Miller RG, McDonald T, Siminerio, LM, Orchard TJ. A novel approach to diabetes prevention: evaluation of the Group Lifestyle Balance program delivered via DVD. Diabetes Res Clin Pract 2010; 90(3): e60-63.

Charles BA, Conley YP, Chen G, Miller RG, Dorman JS, Gorin MB, Ferrell RE, Sereika SM, Rotimi CN, Orchard TJ. Variants of the Adenosine A2A Receptor Gene are Protective against Proliferative Diabetic Retinopathy in Patients with Type 1 Diabetes. Ophthalmic Research 2010; 46(1): 1-8. PMCID: PMC2997447.

Pambianco G, Costacou T, Strotmeyer E, Orchard TJ. Risk factor associations with clinical distal symmetrical polyneuropathy and various neuropathy screening instruments and protocols in type 1 diabetes. Diab Res Clin Pract 2011; 91: e15-e20.

Piatt G, Songer T, Brooks M, Anderson R, Simmons D, Orchard T, Siminerio L, Korytkowski M, Zgibor J. Impact of Patient Level Factors on the Improvement of the ABCs of Diabetes. Patient Educ Couns 2011; 82: 266-270.

Secrest AM, Becker DJ, Kelsey SF, LaPorte RE, Orchard TJ. Characterizing sudden death and dead-in-bed syndrome in Type 1 diabetes: analysis from two childhood-onset Type 1 diabetes registries. Diabetic Medicine 2011; 28(3): 293-300. PMCID: PMC3045678.

Sjølie AK, Klein R, Porta M, Orchard T, Fuller J, Parving HH, Bilous R, Aldington S, Chaturvedi N. Retinal microaneurysm count predicts progression and regression of diabetic retinopathy. Post-hoc results from the DIRECT Programme. Diabet Med 2011; 28(3): 345-351.

Porta M, Hainer JW, Jansson SO, Malm A, Bilous R, Chaturvedi N, Fuller JH, Klein R, Orchard T, Parving H-H, Sjølie A-K on behalf of the DIRECT Study Group. Exposure to candesartan during the first trimester of pregnancy in type 1 diabetes: experience from the placebo-controlled diabetic retinopathy candesartan trials. Diabetologia 2011; 54: 1298-1303.

Conway BN, Aroda VR, Maynard JD, Matter N, Fernandez S, Ratner RE, Orchard TJ. Skin Intrinsic Fluorescence Correlates with Autonomic and Distal Symmetrical Polyneuropathy in Indivduals with Type 1 Diabetes. Diabetes Care 2011; 34(4): 1000-1005. PMCID: PMC3064012.

Secrest AM, Costacou T, Gutelius B, Miller RG, Songer TJ, Orchard TJ. Association of socioeconomic status with mortality in type 1 diabetes: the Pittsburgh Epidemiology of Diabetes Complications Study. Ann Epidemiol 2011 21(5): 367-373. PMCID: PMC3070912.

Secrest AM, Costacou T, Gutelius B, Miller RG, Songer TJ, Orchard TJ. Associations Between Socioeconomic Status and Major Complications in Type 1 Diabetes: The Pittsburgh Epidemiology of Diabetes Complication (EDC) Study. Ann Epidemiol 2011; 21(5): 374-381. PMCID: PMC3079455.

Pambianco G, Costacou T, Strotmeyer E, Orchard TJ. The assessment of clinical distal symmetric polyneuropathy in type 1 diabetes: A comparison of methodologies from the Pittsburgh Epidemiology of Diabetes Complications Cohort. Diabetes Res Clin Practi 2011; 92(2): 280-287.

Tillin T, Orchard T, Malm A, Fuller J, Chaturvedi N. The role of antihypertensive therapy in reducing vascular complications of type 1 diabetes. Findings from the DIabetic REtinopathy Candesartan Trials-Protect 2 Study. J Hypertens 2011 May 19 [Epub ahead of print].