“…This study represents the first longitudinal analysis effort identifying developmental trajectories of cigarette smoking with the distinct developmental courses of smoking initiation and progression in Chinese early adolescents from age 12 to 16 years. In prior studies among Western populations, multiple distinct trajectories have been reported (Brook et al, 2008;Chassin, Presson, Rose, & Sherman, 2001;Chassin et al, 2008;Colder et al, 2001;Gabrhelik et al, 2012;Metzger et al, 2012;Morin, Rodriguez, Fallu, Maiano, & Janosz, 2012;Orlando et al, 2004;White et al, 2002). Colder et al (2001) examined smoking behavior during the period of early to middle adolescence (aged 11-16 years) and identified five distinct trajectory patterns that were labeled as stable puffers, stable light smokers, late slow escalators, late moderate escalators, and early rapid escalators (Colder et al, 2001).…”