We evaluated 207 patients and 207 controls. The mean age was 38 years. Cases differed from controls for phototype, Amerindian ancestry [odds ratio (OR) 2·59], years of beach or rural residence (OR 1·06), time exposed to sun at work (OR 1·65), time exposed to sun in leisure activities (OR 1·04), antidepressant/anxiolytic use (OR 4·96), menstrual irregularity (OR 3·83), pregnancy history (OR 3·59), years of oral contraceptive use (OR 1·23) and anxiety scores (OR 1·08). A family history of melasma was reported in 61% of cases and 13% of controls (OR 10·40).
We evaluated 207 patients and 207 controls. The mean age was 38 years. Cases differed from controls for phototype, Amerindian ancestry [odds ratio (OR) 2·59], years of beach or rural residence (OR 1·06), time exposed to sun at work (OR 1·65), time exposed to sun in leisure activities (OR 1·04), antidepressant/anxiolytic use (OR 4·96), menstrual irregularity (OR 3·83), pregnancy history (OR 3·59), years of oral contraceptive use (OR 1·23) and anxiety scores (OR 1·08). A family history of melasma was reported in 61% of cases and 13% of controls (OR 10·40).
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