[Factors associated with regular cigarette smoking by adolescents from public schools in Londrina, Paraná, Brazil].

This cross-sectional epidemiological study aimed to identify factors associated with regular cigarette smoking among adolescents. The sample included 517 public school 9th graders in Londrina, Paraná State, Brazil. A structured questionnaire was used to collect information, including social and demographic characteristics, social relations, and health risk behaviors.