Table 4.

Association between age and the composite endpoint (attrition because of withdrawal or discontinuation) in the initial phase

Age group (years)	Participants leaving the panel in the initial phase by withdrawal or discontinuation
15–19	12 (30.0%)
20–24	21 (28.4%)
25–29	21 (21.0%)
30–34	19 (22.6%)
35–39	27 (28.1%)
40–44	15 (12.6%)
45–49	30 (20.0%)
50–54	21 (15.7%)
55–59	19 (14.6%)
60–64	9 (10.3%)
65–69	10 (9.9%)