Table 2.

Participation in this Study and Sample Size by Follow-Up Interview With the Percentage of the Total Indicating Missing Data

Study Participation	Baseline	1 Month	6 Months	12 Months
Participated	419	338 (80.7)	316 (75.4)	284 (67.8)
Deceased (total)	NA	12 (2.9)	24 (5.7)	34 (8.1)
Too ill	NA	19 (4.5)	8 (1.9)	13 (3.1)
Missing	NA	50 (11.9)	71 (17.0)	88 (21.0)
Outcome measure missing	9 (2.1)	3 (0.7)	14 (3.3)	12 (2.9)
Total sample by follow-up interview*	410 (97.9)	366 (87.4)	334 (79.7)	319 (76.1)

NOTE. Values are n (%).

Abbreviation: NA, not applicable.

^*The sample included in the analysis of each assessment interval was dependent on the availability of a complete outcome score for the relevant time points or documentation of illness or having died in order to be categorized into the decline group.

(Sample total calculated for each follow-up assessment as the number who participated + the deceased + participants who were too ill – the number missing a measured outcome.)