Figure 1.

Flow diagram for the study. Two hundred fifteen of the 365 exclusions were due to having a high 25(OH)D level. In both the placebo group and vitamin D group, none of the dropouts were due to a gastrointestinal complaint. One dropout in the vitamin D group represents a subject found to have primary hyperparathyroidism at the 3-month visit. Dropouts designated as “other” were due to relocation out of the state or country, general health issues, and 1 subject who was withdrawn by the principal investigator after having gastric bypass surgery, as this would affect vitamin D absorption.