adult human 313 female 252 male 246 Humans 211 Adult 151 article 141 Female 129 Male 126 controlled study 118 middle aged 90 Article 89 Middle Aged 79 human experiment 78 young adult 77 major clinical study 76 Young Adult 71 aged 65 adolescent 60 Adolescent 50 Aged 46 clinical article 43 psychology 43 questionnaire 43 cross-sectional study 42 procedures 38 physiology 36 Cross-Sectional Studies 33 perception 31 randomized controlled trial 30