Related by context. Frequent words. (Click for all words.) 67 National Longitudinal Study 66 National Longitudinal Survey 65 Medical Expenditure Panel 64 NHANES 59 Longitudinal Study 59 longitudinal study 56 Nutrition Examination Survey NHANES 56 NHANES III 56 Interview Survey 55 retrospective cohort study 55 Nationwide Inpatient Sample 55 National Comorbidity Survey 55 BRFSS 54 Ambulatory Medical 54 Nutrition Examination Survey 54 Atherosclerosis Risk 53 prospective observational 53 prospective cohort 51 Current Population Survey 51 End Results SEER 50 J Clin Oncol 50 Professionals Follow 50 subtests 50 Surveillance Epidemiology 50 Youth Risk Behavior 50 Renal Data 50 sociodemographic 49 multivariate analyzes 49 study 49 attention-deficit/hyperactivity disorder ADHD 49 Behavioral Risk 49 Longitudinal 49 substudy 49 anthropometric 49 longitudinal studies 48 meta analysis 48 multicenter study 48 Arch Intern Med 48 WestEd 48 Epidemiologic 48 regression analyzes 48 socio demographic 47 Factor Surveillance 47 phylogenetic analysis 47 Adolescent Health 47 univariate 47 Radiation Therapy Oncology 47 Human Development NICHD 47 Affective Disorders 47 ANOVA 47 Systematic Review 47 Cohort Study 47 Developmental Psychology 46 epidemiologic 46 Jewish Population Survey 46 Prekindergarten 46 journal Biological Psychiatry 46 Arch Neurol 46 Gynecologic Oncology Group 46 placebo controlled Phase 46 Cochrane Database 46 AREDS 46 Framingham Heart 46 demographic variables 46 J Biol Chem 46 analyzed 46 epidemiologic studies 46 Natural Catastrophe Stress 46 National Crime Victimization 46 Consumer Expenditure Survey 45 Fatality Analysis Reporting 45 Substance Use 45 Mathematica Policy Research 45 #:#-# [029] 45 dietary intakes 45 Values Survey 45 Ann Intern Med 45 Intramural Research 45 #:#-# [033] 45 EEGs 45 FoodNet 45 placebo controlled clinical 45 proportional hazards 45 Determinants 45 HealthCore 45 Kidney Diseases NIDDK 45 #:#-# [035] 45 Pre Kindergarten 45 MEDLINE 45 journal Thorax 45 Survey Methodology 45 serologic 45 NICHD 45 NIDCD 45 Multivariate 45 randomly selected sample 45 Systematic Reviews 45 eHI 45 longitudinal 45 PSAT NMSQT 44 Quality AHRQ