Uslu et al18 conducted a cross-sectional study in Aydin, Turkey, on 563 high school students (53.8% [303/563] male; 46.2% [260/563] female) aged 13 to
19 years using a questionnaire on acne, the General Health
Questionnaire (GHQ), and the RSES. Only 550 adolescents consented to examination of facial acne.