Related by context. Frequent words. (Click for all words.) 67 observational study 66 randomized controlled trial 65 study 61 randomized clinical 61 meta analysis 57 cohort 57 Interview Survey 56 multicenter 56 randomized controlled trials 56 epidemiological studies 56 Nutrition Examination Survey 55 Adolescent Health 54 randomized trials 53 Framingham Heart 52 dietary intake 52 postmenopausal women 52 observational studies 52 epidemiological 52 depressive symptoms 52 General Psychiatry 52 placebo controlled 52 randomized placebo controlled 51 randomized controlled 51 journal Neurology 51 randomized clinical trials 51 epidemiologic 51 longitudinal 50 randomized 50 comorbidity 50 researchers 49 postmenopausal 49 Study 49 adolescents 49 survey 49 studies 48 blind placebo controlled 48 double blind placebo 48 Survey 48 Cohort 47 random sample 47 premenopausal women 47 clinical trial 47 Prevalence 47 dataset 47 WHI 46 meta analyzes 46 randomized double 46 socioeconomic status 46 Epidemiology 46 analyzed 46 prospective randomized 46 prospectively 46 prevalence 45 multivariate analysis 45 Researchers 45 index BMI 45 authors conclude 45 blind randomized placebo 45 cognitive function 45 Household Survey 45 genetic variants 44 pre menopausal 44 NAFLD 44 post menopausal 44 Phase IIb trial 44 psychosocial 44 neurobiological 44 Experimental Research 43 blind randomized 43 Previous studies 43 abdominal obesity 43 depressive disorders 43 Cancer Registry 43 nicotine dependence 43 journal Psychological Science 43 n = 43 surveys 43 American Geriatrics Society 43 diabetes mellitus 42 Conclusions 42 metabolic syndrome 42 psychopathology 42 Current Population Survey 42 Clinical Nutrition 42 Youth Risk Behavior 42 questionnaires 42 preterm infants 42 neuroimaging 42 cognitive decline 42 cognitive deficits 41 ADHD symptoms 41 regression analysis 41 cardiovascular mortality 41 Clinical trials 41 statin therapy 41 knee osteoarthritis 41 demographic characteristics 41 Demographic 41 genotypes 41 genotype 41 randomly assigned