human 160 Humans 117 female 114 male 103 adult 85 Female 77 Male 71 Article 59 cross-sectional study 50 middle aged 50 Adult 47 Middle Aged 44 aged 43 major clinical study 43 article 42 controlled study 39 adolescent 37 urban population 37 risk factor 36 urban area 36 Aged 34 China 34 Adolescent 33 Cross-Sectional Studies 32 COVID-19 31 Risk Factors 30 Malaysia 27 Urban Population 27 questionnaire 27 United States 25