Habitual physical activity h | No. of subjects | Treadmill % fall in FEV1 | Step test % fall in FEV1 | p-value |
0–2 | 40 | 17.5±8.4 | 11.3±6.1 | <0.001 |
3–5 | 34 | 13.4±7.5 | 10.2±6.0 | <0.001 |
6–9 | 43 | 14.5±7.1 | 12.0±6.0 | <0.001 |
10–14 | 37 | 14.3±6.8 | 13.0±5.1 | <0.004 |
<0.09¶ | <0.2¶ |
Data are presented as mean±sd
p-values by paired t-test between two tests (treadmill or step test)
¶: an analysis of variance (ANOVA) was used to compare habitual physical activity in hours in the four groups for the same test (treadmill or step test)