Table 4.

Attendance at the center-based physical activity sessions

	Onset of MMD (N = 818)		Recovery from MMD (N = 246)
Medical leave	Before hospitalization	After hospitalization	Before hospitalization	After hospitalization
Included	61.4 (59.5–63.2)	23.9 (20.9–26.9)	28.5 (23.6–33.4)	8.3 (3.8–12.9)
Excluded	74.7 (73.2–76.1)	60.7 (56.7–64.5)	48.5 (42.4–54.6)	29.1 (16.7–41.4)

Data are presented as the mean percentage (95% confidence interval).

Attendance was calculated separately for each 6-month interval, i.e., the time between the follow-up visits, and these values were aggregated across the intervals as described in the Methods. For the onset of MMD, values were calculated as the number of sessions attended divided by the number scheduled during the periods from: (1) no MMD to first hospitalization or next MMD assessment (or censoring) if no hospitalization occurred, and (2) first hospitalization to next MMD assessment (or censoring). For recovery from MMD, similar calculations were performed, except that the beginning of the period was defined by MMD (rather than no MMD). Intervals after MMD recovery were not included in these calculations

Abbreviations: CI confidence interval, MMD major mobility disability