Pubertal timing and smoking initiation in adolescent females: Differences by race

Department of Pediatrics, Division of Adolescent Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
Nicotine & Tobacco Research (Impact Factor: 3.3). 07/2010; 12(7):748-55. DOI: 10.1093/ntr/ntq076
Source: PubMed


The purpose of this study was to examine whether (a) early pubertal timing effects on smoking onset existed for both White and Black girls and (b) whether the association between pubertal timing and smoking onset was moderated by race.
Participants included 264 girls (14.9 +/- 2.2 years, 164 White, and 100 Black) at the baseline report of a longitudinal study of whom 153 reported smoking and age at first cigarette.
Kaplan-Meier analysis stratified by racial group showed a significant difference between the pubertal timing groups for Black girls only. After accounting for covariates using Cox regression, there was no significant interaction between pubertal timing and racial group. There was a main effect of pubertal timing indicating that late maturers were at significantly lower risk for smoking initiation compared with the early and on-time groups, but the early and on-time groups were not significantly different from each other.
Results point to equal risk of early smoking onset for early and on-time maturers of both racial groups, indicating the need for smoking prevention in early adolescence for both White and Black females.

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    • "Finally, pubertal timing, coded as early (0; 1 SD below the mean of this sample), on time (1), or late (2; 1 SD above the mean of this sample) calculated separately by race and based on self-reported age at menarche, was included to control for the effects of puberty on depressive symptoms. This coding is consistent with other studies of pubertal timing (Ge et al. 2006a; Negriff et al. 2010). "
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