Weight development from age 13 to 30 years and adolescent socioeconomic status: The Norwegian Longitudinal Health Behaviour study.

Objectives: To describe the weight development and model change in body mass index (BMI), and to examine the association of adolescent socioeconomic status (SES) with change in BMI distribution in a cohort followed from adolescence through adulthood.

Methods: Participants (n = 924) from western Norway were surveyed seven times from age 13 to 30 (1990-2007). BMI was based on self-reported height and weight.