Related by context. Frequent words. (Click for all words.) 70 causal link between 68 correlation 57 causation 57 causality 57 direct correlation 56 causal 54 linkage 54 inverse relationship 54 empirical evidence 53 correlations 51 link 49 observational studies 48 epidemiological studies 47 statistically significant 47 conclusive evidence 47 conclusively 46 proximate cause 45 randomized controlled trials 45 evidence 45 empirical 45 nexus 44 randomized trials 44 linkages 43 statistical significance 43 prima facie case 43 circumstantial evidence 42 insufficient evidence 42 randomized clinical trials 42 correlate 41 conclusive 41 prima facie evidence 41 hypothesis 41 clinically meaningful 41 preponderance 41 meta analysis 40 empirically 40 circumstantial 40 equivalence 40 definitively 40 epidemiologic 40 predictor 40 prima facie 39 authors conclude 39 contributing factor 39 genetic predisposition 39 regression analysis 39 substantiate 39 etiology 39 provable 38 anecdotal evidence 38 links 38 plausible explanation 38 proof 38 studies 38 probable cause 37 rational explanation 37 epidemiological 37 predisposition 37 parallels 37 correlated 37 predictors 37 unequivocally 37 highly correlated 37 Previous studies 37 correlates 37 motive 37 justification 37 observational study 37 antecedent 37 connection 36 incontrovertible 36 Correlation 36 efficacy 36 coronary heart 36 implication 36 commonalities 36 contributory factor 36 preexisting 36 incidence 36 corroboration 36 similarities 36 unambiguously 36 correlating 36 determinants 35 unambiguous 35 contradiction 35 non inferiority 35 inferences 35 dissociation 35 Ibid. 35 irrefutable 35 corroborating evidence 35 condones 35 prevalence 35 malicious intent 35 corollary 35 reasonably foreseeable 35 mechanistic 34 anecdotal 34 pathogenesis 34 reportable