Related by context. Frequent words. (Click for all words.) 73 causal relationship 71 causal link between 65 causal connection 58 causation 58 conclusively 54 causative 53 inverse association 53 causal 52 empirical evidence 52 causality 52 conclusive evidence 51 epidemiological studies 50 correlation 50 epidemiologic studies 50 conclusive 48 evidence 48 definitively 48 prima facie case 48 meta analyzes 47 observational studies 46 direct correlation 46 link 45 correlations 45 scientifically valid 45 hypothesis 44 linkage 44 causative agent 43 insufficient evidence 43 inverse relationship 43 circumstantial evidence 43 peer reviewed 43 statistically significant 42 provable 42 statistical significance 42 randomized trials 42 randomized controlled trials 42 prima facie 42 prima facie evidence 41 empirical 41 genetic predisposition 41 prenatal exposure 41 proximate cause 41 unambiguously 41 hypotheses 41 cardiovascular mortality 41 conclusive proof 41 modifiable risk 41 scientifically 40 overdiagnosis 40 meta analysis 40 empirically 40 peer reviewed literature 40 statistically significant differences 40 plausible explanation 40 reversible error 40 anecdotal evidence 40 confounding factors 40 substantiate 40 substantiated 40 longitudinal studies 40 antioxidant supplements 40 Previous studies 39 inverse correlation 39 circumstantial 39 generalizable 39 incontrovertible 39 WCJ 39 preponderance 39 underdiagnosed 39 etiology 39 RCTs 39 findings 39 incidence 39 multifactorial 38 randomized clinical trials 38 passive smoking 38 corroborative evidence 38 PLoS One 38 malicious intent 38 subclinical 38 precedents 38 heritability 38 Evidence 38 incontrovertible evidence 38 neurotoxicity 38 predisposition 38 authors conclude 38 rational explanation 38 probable cause 38 peer reviewed scientific 37 magic bullet 37 vitamin D deficiency 37 coronary heart 37 premeditation 37 nexus 37 justification 37 Preliminarily 37 conclusions 37 NAFLD 37 reach statistical significance 37 Lancet Oncology