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Clinical Responsibilities

Direct inpatient and outpatient care; Clinical supervision of medical students, residents and fellows.

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Board Certification

2007 — Ab Internal Medicine - Internal Medicine


1987 — Madras Medical College, Medical Education
1991-1994 — University of Connecticut (Internal Medicine), Residency Training
1995-1998 — University of Pennsylvania School of Medicine (Medicine (Internal)), Clinical Fellowships

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Research Summary

APPROACHES TO PREVENT CARDIOVASCULAR DISEASE The overall goals of Dr. Natarajan's research in cardiovascular disease (CVD) prevention are to improve cardiovascular disease risk assessment and to optimize ways to prevent CVD.

He uses several methodological approaches: 1. ANALYSIS OF LARGE POPULATION-BASED DATABASES. He works with national databases to answer questions relevant to preventing cardiovascular disease. By analysis of such large databases, he examined trends in screening, prevalence and treatment of CVD risk factors using the behavioral risk factor surveillance system, compared variations in health care utilization among adults with CVD risk factors using the Medical Expenditure Panel Survey, determined the validity of self-report of hypercholesterolemia using the National Health and Nutritional Examination Survey III, and evaluated gender differences in CHD mortality in individuals with diabetes using the Framingham data. RECENT RESEARCH ABSTRACTS: Mann DM, Lee JD, Liao Y, Natarajan S, Population Impact of Obesity on Fatal Coronary Heart Disease in US Adults. J Gen Int Med 19 (Suppl 1): 2004 p193. Miller LH, Lipsitz SR, Natarajan S, Ethnic Differences in Glycemic and Cardiovascular Risk Factor Levels in US Adults with Diabetes. J Gen Int Med 19 (Suppl 1): 2004 p150. Lee J, Mann D, Natarajan S, Association of Nutrient Intake and Elevated C-Reactive protein in U.S. Adults. J Gen Int Med 19 (Suppl 1): 2004 p123. Park S, Mann DM, Lipsitz SR, Natarajan S. Gender interactions in risk for congestive heart failure Circulation 2004 109(7):E89-E90.

2. Currently, he is focused on conducting RANDOMIZED CONTROLLED TRIALS (RCT's) TO EVALUATE BEHAVIORAL INTERVENTIONS. He evaluated the association of transtheoretical stages of change constructs with glycemic control and blood pressure control in low-income patients with CVD risk factors, and is using the transtheoretical framework in other studies. He is conducting a RCT to definitively test the effect of a stage-matched behavioral intervention on treatment adherence and hypertension control in collaboration with experts in behavioral theory. RECENT RESEARCH ABSTRACTS: Natarajan S, Santa Ana E, Nietert P, Magruder KM, A Behavioral Stage-Matched Intervention for Improving Hypertension Control. JGIM, Vol. 19 Suppl. 1 (April) 2004 page 109. The 27th SGIM Annual Meeting, May 2004

Research Interests

Dr. Natarajan's research is targeted at developing approaches to prevent cardiovascular disease using the tools of clinical epidemiology and health services research

Research Keywords

Behavior modification; cardiovascular risk factors; hypertension; hypercholesterolemia; diabetes; randomized clinical trials; economic evaluations; analysis of population-based databases.

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All data from NYU Health Sciences Library Faculty Bibliography — -


Who is being reached for a telephone-delivered intervention for patients with uncontrolled hypertension?
Friedberg, Jennifer P; Robinaugh, Donald J; Wang, Binhuan; Allegrante, John P; Lipsitz, Stuart R; Natarajan, Sundar
2014 Mar;20(3):229-234, Telemedicine journal & e-health
— id: 829332, year: 2014, vol: 20, page: 229, stat: Journal Article,

Cystatin C-based glomerular filtration rate: An improved predictor of mortality
Milin, A; Parikh, A; Lipsitz, S R; Natarajan, S
2012 July 2012;27:S151-S152, Journal of general internal medicine
— id: 783302, year: 2012, vol: 27, page: S151, stat: Journal Article,

Association between food insufficiency and mortality: Joint effect with income on all-cause and cause-specific mortality
Zhu, J; Parikh, A; Lipsitz, S R; Natarajan, S
2012 July 2012;27:S126-S127, Journal of general internal medicine
— id: 783352, year: 2012, vol: 27, page: S126, stat: Journal Article,

Iron Deficiency in Community-Dwelling US Adults With Self-Reported Heart Failure in the National Health and Nutrition Examination Survey III: Prevalence and Associations With Anemia and Inflammation
Parikh, Ankit; Natarajan, Sundar; Lipsitz, Stuart R; Katz, Stuart D
2011 Sep 1;4(5):599-606, Circulation: Heart Failure
— id: 137836, year: 2011, vol: 4, page: 599, stat: Journal Article,

Challenges and recommendations for blinding in behavioral interventions illustrated using a case study of a behavioral intervention to lower blood pressure
Friedberg, Jennifer P; Lipsitz, Stuart R; Natarajan, Sundar
2010 Jan;78(1):5-11, Patient education & counseling
— id: 105495, year: 2010, vol: 78, page: 5, stat: Journal Article,

Cross sectional time trend: Prevalence of myocardial infarction in the USA has decreased over a 10-15 year period in midlife men but increased in women, with a greater decrease in cardiovascular risk in men compared to women
Hayashi, Vivian N; Natarajan, Sundar
2010 Apr;15(2):64-64, Evidence Based Medicine
— id: 109569, year: 2010, vol: 15, page: 64, stat: Journal Article,

Comparative Effectiveness of Two Telephone-Delivered Behavioral Interventions to Improve Hypertension Control. Primary Outcomes of a Randomized Controlled Trial
Natarajan, S; Friedberg, J; Ulmer, M; Lin, I; Robinaugh, D; Allegrante, J; Wylie-Rosett, J; Lipsitz, SR
2010 ;122(21):2224-2224, Circulation
— id: 132214, year: 2010, vol: 122, page: 2224, stat: Journal Article,

Logistic regression with incomplete covariate data in complex survey sampling: application of reweighted estimating equations
Moore, Charity G; Lipsitz, Stuart R; Addy, Cheryl L; Hussey, James R; Fitzmaurice, Garrett; Natarajan, Sundar
2009 May;20(3):382-390, Epidemiology
— id: 97806, year: 2009, vol: 20, page: 382, stat: Journal Article,

Effect of treatment and adherence on ethnic differences in blood pressure control among adults with hypertension
Natarajan, Sundar; Santa Ana, Elizabeth J; Liao, Youlian; Lipsitz, Stuart R; McGee, Daniel L
2009 Mar;19(3):172-179, Annals of epidemiology
— id: 92784, year: 2009, vol: 19, page: 172, stat: Journal Article,

Association Between a DASH-Like Diet and Mortality in Adults With Hypertension: Findings From a Population-Based Follow-Up Study
Parikh, Ankit; Lipsitz, Stuart R; Natarajan, Sundar
2009 Apr;22(4):409-416, American journal of hypertension
— id: 96811, year: 2009, vol: 22, page: 409, stat: Journal Article,

Variance estimation in complex survey sampling for generalized linear models
Natarajan, S; Lipsitz, SR; Fitzmaurice, G; Moore, CG; Gonin, R
2008 NOV ;57(6):75-87, Journal of the Royal Statistical Society. Series C (Applied Statistics)
— id: 87178, year: 2008, vol: 57, page: 75, stat: Journal Article,

Gender Differences In The Effect Of Hemoglobin A1c On Mortality In Adults with Diabetes: Findings From A National Population-based Follow-up Study
Parikh, A; Lipsitz, S; Natarajan, S
2008 ;118(18):S1134-S1134, Circulation
— id: 132215, year: 2008, vol: 118, page: S1134, stat: Journal Article,

Usefulness of a run-in period to reduce drop-outs in a randomized controlled trial of a behavioral intervention
Ulmer, Michelle; Robinaugh, Donald; Friedberg, Jennifer P; Lipsitz, Stuart R; Natarajan, Sundar
2008 Sep;29(5):705-710, Contemporary clinical trials
— id: 79426, year: 2008, vol: 29, page: 705, stat: Journal Article,

Impact of dietary N-3 fatty acid and statins on HDL and total cholesterol levels in US adults: An analysis of the 1999-2002 National Health and Nutrition Examination Survey
Hui, JK; Lipsitz, S; Natarajan, S
2007 ;115(8):E220-E220, Circulation
— id: 132216, year: 2007, vol: 115, page: E220, stat: Journal Article,

Predictors of Adherence to Statins for Primary Prevention
Mann, Devin M; Allegrante, John P; Natarajan, Sundar; Halm, Ethan A; Charlson, Mary
2007 Aug;21(4):311-316, Cardiovascular drugs & therapy
— id: 73389, year: 2007, vol: 21, page: 311, stat: Journal Article,

Dietary indiscretion and statin use
Mann, Devin M; Allegrante, John P; Natarajan, Sundar; Montori, Victor M; Halm, Ethan A; Charlson, Mary
2007 Aug;82(8):951-957, Mayo Clinic proceedings
— id: 73388, year: 2007, vol: 82, page: 951, stat: Journal Article,

Inverse Relationship between Lipid-lowering Drugs and Saturated Fat Intake in US Adults
Mann, Devin M; Natarajan, Sundar
2007 Apr;21(2):109-115, Cardiovascular drugs & therapy
— id: 71136, year: 2007, vol: 21, page: 109, stat: Journal Article,

Reasons for poor adherence in a prospective cohort of new statin users
Mann, DM; Allegrante, J; Natarajan, S; Halm, E
2007 ;115(8):E278-E278, Circulation
— id: 132217, year: 2007, vol: 115, page: E278, stat: Journal Article,

Agreement between two ratings with different original scales
Natarajan S; McHenry MB; Lipsitz S; Klar N; Lipshultz S
Advances in statistical methods for the health sciences Boston : Birkhauser, 2007,
— id: 4236, year: 2007, vol: , page: 139, stat: Chapter,

A measure of partial association for generalized estimating equations
Natarajan, S; Lipsitz, S; Parzen, M; Lipshultz, S
2007 JUL ;7(2):175-190, Statistical modelling
— id: 74686, year: 2007, vol: 7, page: 175, stat: Journal Article,

A simple method of determining confidence intervals for population attributable risk from complex surveys
Natarajan, Sundar; Lipsitz, Stuart R; Rimm, Eric
2007 Jul 30;26(17):3229-3239, Statistics in medicine
— id: 71137, year: 2007, vol: 26, page: 3229, stat: Journal Article,

Determinants of sustained uncontrolled blood pressure in a national cohort of persons with diabetes
Greenberg, Jeffrey D; Tiwari, Anjali; Rajan, Mangala; Miller, Donald; Natarajan, Sundar; Pogach, Leonard
2006 Feb;19(2):161-169, American journal of hypertension
— id: 62483, year: 2006, vol: 19, page: 161, stat: Journal Article,

Independent effect and population impact of obesity on fatal coronary heart disease in adults
Mann, Devin M; Lee, Joshua; Liao, Youlian; Natarajan, Sundar
2006 Jan;42(1):66-72, Preventive medicine
— id: 62485, year: 2006, vol: 42, page: 66, stat: Journal Article,

Sex differences in the effect of diabetes duration on coronary heart disease mortality
Natarajan, Sundar; Liao, Youlian; Sinha, Debajyoti; Cao, Guichan; McGee, Daniel L; Lipsitz, Stuart R
2005 Feb 28;165(4):430-435, Archives of internal medicine
— id: 49305, year: 2005, vol: 165, page: 430, stat: Journal Article,

Generalized linear models with a coarsened covariate
Lipsitz, S; Parzen, M; Natarajan, S; Ibrahim, J; Fitzmaurice, G
2004 ;53:279-292, Journal of the Royal Statistical Society. Series C (Applied Statistics)
— id: 42291, year: 2004, vol: 53, page: 279, stat: Journal Article,

Cholesterol screening in people aged >50 years effectively identifies people at high risk of coronary disease
Mann DM; Natarajan S
2004 ;8:15-17, Evidence-based healthcare
— id: 42116, year: 2004, vol: 8, page: 15, stat: Journal Article,

Hypertension, diabetes, hypercholesterolemia, and their combinations increased health care utilization and decreased health status
Natarajan, Sundar; Nietert, Paul J
2004 9;57(9):954-961, Journal of clinical epidemiology
— id: 45471, year: 2004, vol: 57, page: 954, stat: Journal Article,

Cholesterol screening in people aged > 50 years effectively identifies people at high risk of coronary disease
Wilson, S; Johnston, A; Robson, J; Murchie, P; Mann, DM; Natarajan, S
2004 ;8(1):15-17, Evidence-based healthcare
— id: 649202, year: 2004, vol: 8, page: 15, stat: Journal Article,

Cholesterol measures to identify and treat individuals at risk for coronary heart disease
Natarajan, Sundar; Glick, Henry; Criqui, Michael; Horowitz, David; Lipsitz, Stuart R; Kinosian, Bruce
2003 Jul;25(1):50-57, American journal of preventive medicine
— id: 36678, year: 2003, vol: 25, page: 50, stat: Journal Article,

Sex differences in risk for coronary heart disease mortality associated with diabetes and established coronary heart disease
Natarajan, Sundar; Liao, Youlian; Cao, Guichan; Lipsitz, Stuart R; McGee, Daniel L
2003 Jul 28;163(14):1735-1740, Archives of internal medicine
— id: 36979, year: 2003, vol: 163, page: 1735, stat: Journal Article,

National trends in screening, prevalence, and treatment of cardiovascular risk factors
Natarajan, Sundar; Nietert, Paul J
2003 May;36(4):389-397, Preventive medicine
— id: 45938, year: 2003, vol: 36, page: 389, stat: Journal Article,

Prediction of mortality from coronary heart disease among diverse populations: is there a common predictive function?
Diverse Populations Collaborative Group; Bean J; Cao G; Conroy R; Cooper R; David Hole D; Durazo-Arvizu R; Froom P; Gazes P; Gillis C; Goldbourt U; Hames C; Hart C; Hawthorne V; Jorgensen t; Keil J; Khedouri C; Kozarevic D; Lackland D; Li Y, Li Z; Liao Y; Lin S; Lipsitz S; Liu X; McGee D; Natarajan S; Selmer R; Sempos C; Sigurdsson E; Sinha D; Sutherland S; Thomsen T; Tilley B; Tverdal A; Vojvodic N; Yaari S
2002 Sep;88(3):222-228, Heart (British Cardiac Society)
— id: 42041, year: 2002, vol: 88, page: 222, stat: Journal Article,

Association of exercise stages of change with glycemic control in individuals with type 2 diabetes
Natarajan, Sundar; Clyburn, Ernest B; Brown, Ronald T
2002 Sep-Oct;17(1):'1527'-'1529', American journal of health promotion
— id: 34108, year: 2002, vol: 17, page: '1527', stat: Journal Article,

Self-report of high cholesterol: determinants of validity in U.S. adults
Natarajan, Sundar; Lipsitz, Stuart R; Nietert, Paul J
2002 Jul;23(1):13-21, American journal of preventive medicine
— id: 34109, year: 2002, vol: 23, page: 13, stat: Journal Article,

Diagnosis and management of pneumonia
Natarajan S; Rakes K
Mangement of antimicrobials in infectious diseases Totowa NJ : Humana, 2000,
— id: 2988, year: 2000, vol: , page: 143, stat: Chapter,

"Applied quantitative methods for health services management"
Natarajan S
1998 ;18(1):124-125, Medical decision making
— id: 34118, year: 1998, vol: 18, page: 124, stat: Journal Article,

Large-cell change of hepatocytes in cirrhosis may represent a reaction to prolonged cholestasis
Natarajan S; Theise ND; Thung SN; Antonio L; Paronetto F; Hytiroglou P
1997 Mar;21(3):312-318, American journal of surgical pathology
— id: 35154, year: 1997, vol: 21, page: 312, stat: Journal Article,

Should percutaneous transluminal coronary angioplasty catheters be reused?
Natarajan S; Williams SV
1996 Jul;28(1):112-113, Journal of the American College of Cardiology
— id: 34110, year: 1996, vol: 28, page: 112, stat: Journal Article,

Isolation and characterization of a repetitive DNA element from the genome of the human filarial parasite, Brugia malayi
Natarajan S; Werner C; Cameron M; Rajan TV
1990 Nov;43(1):39-49, Molecular & biochemical parasitology
— id: 34119, year: 1990, vol: 43, page: 39, stat: Journal Article,

Maternal fetal immunological relationship, particularly mycobacterial immunity
Rajajee S; Natarajan S
1990 ;28:363-367, Indian pediatrics
— id: 34120, year: 1990, vol: 28, page: 363, stat: Journal Article,