Skip to main content

Table 2 Childhood and adolescent stage of initial engagement among adolescents engaged in risk behavior activity at age 18 ya

From: Initial engagement and persistence of health risk behaviors through adolescence: longitudinal findings from urban South Africa

Measure N initiate behavior N current behavior Childhood
< 11 y
Early
11 to 13 y
Mid
14 to 16 y
Late
17 to 18 y
p-valueb
Males
 Smoking 719 278 18 (44%) 130 (52%) 115 (53%) 15 (29%) 0.01
 Alcohol use 537 300 2 (33%) 132 (59%) 109 (72%) 57 (56%) 0.02
 Illicit drug use 273 89 NA 4 (33%) 22 (22%) 62 (64%) <  0.01
 Sexual activity 577 222 NA 40 (52%) 135 (54%) 47 (41%) 0.05
Females
 Smoking 649 140 8 (50%) 37 (25%) 71 (27%) 24 (23%) 0.15
 Alcohol use 521 210 2 (18%) 62 (38%) 85 (49%) 61 (42%) 0.05
 Illicit drug use 133 30 NA 1 (11%) 7 (16%) 21 (37%) 0.04
 Sexual activity 629 293 NA 3 (50%) 136 (61%) 154 (52%) 0.10
  1. a Displayed as N (%) of individuals who initiated a behavior in a given stage that reported current behavior activity at age 18 y
  2. b Chi-square p-values testing differences in childhood and adolescent stage of initiation among adolescents engaged in risk behavior activity at age 18 y