Figure 3.

Associations between change in 25(OH)D status and change in physical function over 12 months: Lifestyle Interventions and Independence for Elders Pilot. (a) Short physical performance battery (SPPB). (b) Four hundredmeter walk speed. Least squared means with 95% confidence intervals. Reference group: no change in 25(OH)D status. Models adjusted for age, gender, race, field center, season, education, visit, randomization arm, visit by randomization arm interaction, body mass index, and physical activity.