Women’s longitudinal smoking patterns from preconception through child’s kindergarten entry: profiles of biological mothers of a 2001 US birth cohort.

To identify longitudinal patterns of women’s smoking during the pre-conception, perinatal, and early parenting period and describe risk factors distinguishing the different profiles. We conducted longitudinal latent class analysis of maternal smoking status over a 6–7 year period in a sample of 8,650 biological mothers of the Early Childhood Longitudinal Study-Birth Cohort, nationally representative of US births in 2001. Five latent classes were identified: pregnancy-inspired quitters (4.3 %), delayed initiators (5.1 %), persistent smokers (8.5 %), temporary quitters (10.4 %), and nonsmokers (71.7 %). These classes were distinguished by age, race/ethnicity, education, poverty status, marital status, parity, drinking behavior, and depression. For example, when compared to those with college degrees, those with less than a high school degree were at least five times as likely to be in the delayed initiator, temporary quitter, or persistent smoker classes (vs. the nonsmoker class). Heterogeneous longitudinal smoking patterns indicate the need for both prevention messages and cessation treatment continuing past parturition, tailored to fit individual profiles in order to achieve better health outcomes for both mothers and children.