Mixed model regression equation: all women final model.

SED: Standard erythemal dose.1From sunlight vitamin D (as assessed from polysulphone badges), total dietary vitamin D intake (by food diary only), recent holiday abroad, body weight, body surface area exposed to sunlight and sunblock use. Physical activity was not found to be significant predictor and not included in the final model.225-hydroxyvitamin D (25(OH)D) was log transformed to obtain normal distribution.3Including supplements (mainly cod liver oil which adds 5 µg vitamin D a day).All p values maintained significance after adjustment for multiple testing, except from body surface, that was borderline significant even before adjustment (p = 0.04), and body weight.