Humans 23 human 23 major clinical study male 22 odds ratio 22 adult 21 female 21 Article 20 Female 18 Male 18 Middle Aged 16 controlled study 16 middle aged 16 Odds Ratio 15 Adult 13 aged 12 Aged 11 Logistic Models 11 statistical model 10 Risk Factors 9 risk factor 8 disease severity 7 Adolescent 6 Young Adult 6 adolescent 6 cohort analysis 6 very elderly 6 young adult 6 Aged, 80 and over 5 Retrospective Studies 5