Related by context. Frequent words. (Click for all words.) 59 retrospective cohort study 59 Medical Expenditure Panel 56 longitudinal study 56 Atherosclerosis Risk 56 prospective observational 55 prospective cohort 54 multicenter study 53 longitudinal studies 53 NHANES 53 randomized controlled trial 52 End Results SEER 52 Professionals Follow 52 National Longitudinal Survey 52 substudy 52 randomized controlled clinical 52 placebo controlled clinical 52 cognitively normal 52 Cohort Study 52 placebo controlled trials 51 Aging NIA 51 Medicine BUSM 51 observational study 51 Surveillance Epidemiology 51 Health Initiative WHI 51 American Geriatrics Society 50 Eye Disease 50 Ambulatory Medical 50 Nutrition Examination Survey NHANES 50 randomized clinical 50 ADNI 50 Veterans Affairs VA 50 Framingham Heart 50 BRFSS 49 RCTs 49 epidemiological 49 Veterans Administration 49 postmenopausal 49 randomized controlled clinical trials 49 HRQOL 49 microalbuminuria 49 randomized trials 49 bariatric procedures 49 study 49 epidemiologic 49 epidemiologic studies 48 placebo controlled studies 48 Factor Surveillance 48 randomized controlled trials 48 generalizability 48 National Comorbidity Survey 48 posttraumatic stress disorder PTSD 48 prostate biopsy 48 digital rectal examination 48 Nutrition Examination Survey 48 Mental Health NIMH 48 multicenter 48 nondiabetic 47 Outpatient Clinic 47 Interview Survey 47 affective disorders 47 Longitudinal 47 T2DM 47 Longitudinal Study 47 JAMA. 47 National Longitudinal Study 47 comorbidity 47 Mild Cognitive Impairment 47 epidemiological studies 47 Arch Intern Med 47 Behavioral Risk 47 SFVAMC 47 screening colonoscopy 47 Duke Comprehensive Cancer 47 Veterans Affairs 47 randomized controlled 47 postmenopausal women 47 AHRQ 46 Phase 1b trial 46 virologic 46 Veterans Affairs Medical 46 randomized clinical trials 46 premenopausal women 46 neuroimaging 46 coronary artery calcification 46 Prospective Investigation 46 Thoracic Oncology 46 researchers 46 coronary revascularization 46 prospective randomized controlled 46 stable angina 46 VA 46 NORC 46 eGFR 46 placebo controlled 46 prediabetic 46 meta analyzes 46 QIOs 46 multicenter clinical 46 premenopausal 46 HCV infected 46 estimated glomerular filtration