Research Article

Darker Skin Color Measured by Von Luschan Chromatic Scale and Increased Sunlight Exposure Time Are Independently Associated with Decreased Odds of Vitamin D Deficiency in Thai Ambulatory Patients

Table 1

Questionnaire for ascertainment of daily sunlight exposure time.

Day of week6 am–8 am8 am–10 am10 am–12 pm12 pm–2 pm2 pm–4 pm4 pm–6 pm

Question: In your usual clothes and on average, how many minutes are you exposed to sunlight during each specified period?

Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday