From: Vitamin D supplementation during rehabilitation in COPD: a secondary analysis of a randomized trial
 | Placebo | Vit D | P-value |
---|---|---|---|
(25-OHD < 20) | (25-OHD < 20) | ||
(n=16) | (n=15) | ||
Δ Exercise Performance |  |  |  |
6MWD (meter) | 18±45 | 45±44 | 0.106 |
VO2max (ml/min) | −8±190 | 96±202 | 0.156 |
Wmax (watt) | 3±14 | 10±12 | 0.140 |