Key result
High relative weight at 1 year of age was associated with a three to four times higher prevalence of obesity in adolescence compared to low relative weight, with an estimated risk ratio of 1.6.
Why the study?
Does high relative weight at 1 year of age increase the risk of obesity in urban Black adolescents?
Cohort (n=789)
Does high relative weight at 1 year of age increase the risk of obesity in urban Black adolescents?
High relative weight at 1 year of age is associated with a significantly increased risk of obesity during adolescence in urban Black youth.
Answers are grounded in this paper and cite their sources.
May inform early monitoring in urban Black infants; extends prior data but leaves open causality and intervention effects.
The prevalence of obesity was determined in 789 9 to 15-year-old Philadelphia subjects who had either a high (+1 SD) or a low (-1, SD) relative weight at 1 year of age. During the adolescent years, obesity was assessed by the triceps skin-fold thickness and by the relative weight, using national reference standards from the US Health Examination Survey. The prevalence of obesity for the high relative weight group at 1 year of age was three to four times higher than in the low relative weight group at 1 year of age. Compared with all urban youth of this age range, regardless of their status at 1 year of age, it is estimated that the risk ratio associated with a high relative weight at 1 year of age is approximately 1.6.
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Francis E. Johnston (1978) conducted a cohort in Obesity (n=789). High relative weight (+1 SD) at 1 year of age vs. Low relative weight (-1 SD) at 1 year of age was evaluated on Prevalence of obesity during adolescent years (RR 1.6). High relative weight at 1 year of age was associated with a three to four times higher prevalence of obesity in adolescence compared to low relative weight, with an estimated risk ratio of 1.6.
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