TABLE 3.

Independent between-visit behaviors among respondents

Behavior by age, y	2008	2011	P
Contact MD if problem (%)
10–12	0	0	ns
13–15	1	0	ns
16–18	12	12	ns
19–21	31	56	ns
>21	65	67	ns
Schedules appointments (%)
10–12	2	0	ns
13–15	1	0	ns
16–18	9	6	ns
19–21	34	56	ns
>21	67	75	ns
Remembers appointments (%)
10–12	2	0	ns
13–15	3	0	ns
16–18	14	12	ns
19–21	41	52	ns
>21	73	83	ns

Independent behavior is considered 4 (“mostly me”) or 5 (“I do it totally myself”) and represents the responsibility for doing the task rather than whether the task was always completed. Percentage is proportion of those responding 4 or 5 compared with the total in that age group that year. There is no statistically significant difference between groups. ns = not significant.