Public health nutrition · 2016
BMI-specific associations between health-related behaviours and overweight - a longitudinal study among Norwegian adolescents.
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Oellingrath Inger M, Svendsen Martin V
Аннотация
OBJECTIVE: To investigate BMI-specific associations between health-related behaviours in early adolescence and the likelihood of overweight in mid-adolescence in a sample of Norwegian adolescents.
DESIGN: Longitudinal study of 393 adolescents recruited from schools in Telemark County, Norway. Parents reported baseline data on children's behavioural variables and background data (at age 12-13 years). Dietary data were reported by means of a retrospective FFQ. Eating patterns were identified using principal component analysis. Height and weight were measured at baseline and 3-year follow-up. BMI-specific differences in health-related behaviours (eating patterns, physical activity and screen time) at baseline were analysed using cross-tabulation and Pearson's χ 2 test (Fisher's test). Associations between early health-related behaviours and the likelihood of later overweight were examined using multiple logistic regression.
SETTING: Primary and secondary schools, Telemark, Norway.
SUBJECTS: Children (n 393) in 7th grade (mean age 12·7 (sd 0·3) years), followed up in 10th grade, and parents.
RESULTS: A moderate to high intake of a varied Norwegian eating pattern combined with moderate-to-vigorous physical activity ≥1 h/d in the 7th grade were associated with a reduced likelihood of being overweight in the 10th grade, but only among already overweight adolescents (adjusted OR=0·2; 95 % CI 0·1, 1·0). Screen time of >3 h/d in the 7th grade was associated with an increased likelihood of subsequent overweight only among adolescents with an initial normal weight (adjusted OR=2·8; 95 % CI 1·1, 7·3).
CONCLUSIONS: BMI-specific associations were observed between health-related behaviours in early adolescence and the likelihood of being overweight in mid-adolescence.
DESIGN: Longitudinal study of 393 adolescents recruited from schools in Telemark County, Norway. Parents reported baseline data on children's behavioural variables and background data (at age 12-13 years). Dietary data were reported by means of a retrospective FFQ. Eating patterns were identified using principal component analysis. Height and weight were measured at baseline and 3-year follow-up. BMI-specific differences in health-related behaviours (eating patterns, physical activity and screen time) at baseline were analysed using cross-tabulation and Pearson's χ 2 test (Fisher's test). Associations between early health-related behaviours and the likelihood of later overweight were examined using multiple logistic regression.
SETTING: Primary and secondary schools, Telemark, Norway.
SUBJECTS: Children (n 393) in 7th grade (mean age 12·7 (sd 0·3) years), followed up in 10th grade, and parents.
RESULTS: A moderate to high intake of a varied Norwegian eating pattern combined with moderate-to-vigorous physical activity ≥1 h/d in the 7th grade were associated with a reduced likelihood of being overweight in the 10th grade, but only among already overweight adolescents (adjusted OR=0·2; 95 % CI 0·1, 1·0). Screen time of >3 h/d in the 7th grade was associated with an increased likelihood of subsequent overweight only among adolescents with an initial normal weight (adjusted OR=2·8; 95 % CI 1·1, 7·3).
CONCLUSIONS: BMI-specific associations were observed between health-related behaviours in early adolescence and the likelihood of being overweight in mid-adolescence.