Additional file 1: of Screening for vitamin D deficiency in a tropical area: results of a sun exposure questionnaire

Figure S1. Receiver operating characteristic (ROC) curve showing the performance (sensitivity and specificity) of total sun exposure score to predict vitamin D deficiency (serum 25OHD concentration below 20 ng/mL) in healthy Caucasian individuals living in São Paulo, Brazil. Area under the curve = 0.559; p = 0.172. (DOCX 46 kb