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Ravi Varadhan
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Frailty assessment instruments: systematic characterization of the uses and contexts of highly-cited instruments
BJ Buta, JD Walston, JG Godino, M Park, RR Kalyani, QL Xue, ...
Ageing research reviews 26, 53-61, 2016
7712016
Frailty in older adults: a nationally representative profile in the United States
K Bandeen-Roche, CL Seplaki, J Huang, B Buta, RR Kalyani, ...
Journals of Gerontology Series A: Biomedical Sciences and Medical Sciences …, 2015
7102015
Initial manifestations of frailty criteria and the development of frailty phenotype in the Women's Health and Aging Study II
QL Xue, K Bandeen-Roche, R Varadhan, J Zhou, LP Fried
The Journals of Gerontology Series A: Biological Sciences and Medical …, 2008
6372008
Nonlinear multisystem physiological dysregulation associated with frailty in older women: implications for etiology and treatment
LP Fried, QL Xue, AR Cappola, L Ferrucci, P Chaves, R Varadhan, ...
Journals of Gerontology Series A: Biomedical Sciences and Medical Sciences …, 2009
5862009
Unifying optimization algorithms to aid software system users: optimx for R
JC Nash, R Varadhan
Journal of Statistical Software 43, 1-14, 2011
5182011
Simple and globally convergent methods for accelerating the convergence of any EM algorithm
R Varadhan, C Roland
Scandinavian Journal of Statistics 35 (2), 335-353, 2008
3652008
Development of the Instrument to assess the Credibility of Effect Modification Analyses (ICEMAN) in randomized controlled trials and meta-analyses
S Schandelmaier, M Briel, R Varadhan, CH Schmid, N Devasenapathy, ...
Cmaj 192 (32), E901-E906, 2020
3322020
Frailty and mortality in kidney transplant recipients
MA McAdams-DeMarco, A Law, E King, B Orandi, M Salter, N Gupta, ...
American journal of transplantation 15 (1), 149-154, 2015
3302015
The predictive approaches to treatment effect heterogeneity (PATH) statement
DM Kent, JK Paulus, D Van Klaveren, R D'Agostino, S Goodman, ...
Annals of internal medicine 172 (1), 35-45, 2020
2662020
The physical frailty syndrome as a transition from homeostatic symphony to cacophony
LP Fried, AA Cohen, QL Xue, J Walston, K Bandeen-Roche, R Varadhan
Nature aging 1 (1), 36-46, 2021
2632021
BB: An R package for solving a large system of nonlinear equations and for optimizing a high-dimensional nonlinear objective function
R Varadhan, P Gilbert
Journal of statistical software 32, 1-26, 2010
2622010
Simple biologically informed inflammatory index of two serum cytokines predicts 10 year all-cause mortality in older adults
R Varadhan, W Yao, A Matteini, BA Beamer, Q Xue, H Yang, B Manwani, ...
Journals of Gerontology Series A: Biomedical Sciences and Medical Sciences …, 2014
2522014
Oxidative protein damage is associated with poor grip strength among older women living in the community
C Howard, L Ferrucci, K Sun, LP Fried, J Walston, R Varadhan, ...
Journal of Applied Physiology 103 (1), 17-20, 2007
2472007
Higher levels and blunted diurnal variation of cortisol in frail older women
R Varadhan, J Walston, AR Cappola, MC Carlson, GS Wand, LP Fried
The Journals of Gerontology Series A: Biological Sciences and Medical …, 2008
2172008
numDeriv: Accurate numerical derivatives
P Gilbert, R Varadhan
R package version 1, 2019, 2016
2112016
Evaluating health outcomes in the presence of competing risks: a review of statistical methods and clinical applications
R Varadhan, CO Weiss, JB Segal, AW Wu, D Scharfstein, C Boyd
Medical care 48 (6), S96-S105, 2010
2112010
Development of a claims-based frailty indicator anchored to a well-established frailty phenotype
JB Segal, HY Chang, Y Du, JD Walston, MC Carlson, R Varadhan
Medical care 55 (7), 716-722, 2017
1872017
Methodologic approach for the biomarkers reflecting inflammation and nutritional determinants of anemia (BRINDA) project
SML Namaste, GJ Aaron, R Varadhan, JM Peerson, PS Suchdev, ...
The American journal of clinical nutrition 106, 333S-347S, 2017
1842017
Association between reduced heart rate variability and cognitive impairment in older disabled women in the community: Women's Health and Aging Study I
DH Kim, LA Lipsitz, L Ferrucci, R Varadhan, JM Guralnik, MC Carlson, ...
Journal of the American Geriatrics Society 54 (11), 1751-1757, 2006
1592006
Rationalizing prescribing for older patients with multimorbidity: considering time to benefit
HM Holmes, LC Min, M Yee, R Varadhan, J Basran, W Dale, CM Boyd
Drugs & aging 30, 655-666, 2013
1542013
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