Adherence rates. (A) Adherence rate for the entire cohort over the 5 months of observation. (B) Adherence rate over time according to race. Test for heterogeneity: P < .0001; Asian Americans vs non-Hispanic whites: P = .01; African Americans vs non-Hispanic whites: P < .0001; African Americans vs Asian Americans: P = .41. (C) Adherence rate over time according to annual household income (<$50 000 vs ≥$50 000). (D) Adherence rate over time according to household structure (single parent/single child; nuclear family; single parent/multiple children). Test for heterogeneity: P = .05; single parent/single child vs single parent/multiple children: P = .1; nuclear family vs single parent/single child: P = .04; nuclear family vs single parent/multiple children: P = .6. (E) Adherence rate over time according to presence/absence of mother as the full-time caregiver. (A-E) Presented on the plots are the 95% CIs of model estimates.