Search Results

Methods: We analyzed two nationally representative prospective cohorts of children in the 1979 National Longitudinal Survey of Youth, ages 2 through 8 at baseline and followed for 6 years, from 1988 to 1994 (cohort 1, n=2672) and 1994 to 2000 (cohort 2, n=1991). The main exposure variable was obesity (defined as never obese, became obese, always obese, and became nonobese). The main outcomes were standardized scores on four cognitive assessments. Univariate regression analyses of test scores on obesity were performed. Fixed-effects regression models, controlling for measured and unmeasured time-invariant confounders, were additionally adjusted for time-variant confounders to analyze the impact of change in obesity status on change in test scores.

Results: Unadjusted analyses revealed a significant association between obesity and Peabody Individual Achievement Test (PIAT) scores. In cohort 1, always obese children had lower PIAT math scores than never obese children (β=–7.48; p<0.05). Always obese boys had lower PIAT math scores than those who were never obese (β=–16.45; p<0.01). In cohort 2, PIAT math scores were lower in the became obese category than the never obese category (β=–4.10; p<0.05). Always obese girls had lower PIAT reading scores than those who were never obese (β=−11.28; p<0.01). Fixed-effects models additionally adjusted for Home Observation Measurement of the Environment, Short Form score and height percentile showed no significant relationship between obesity and test scores in either cohort.

Methods: Data were drawn from 6379 child respondents of the 1979 National Longitudinal Survey of Youth aged 13 and older at last assessment. Cox proportional hazards regression models were estimated predicting age at first sexual intercourse from weight status during childhood without and with adjustment for correlated risk factors. Analyses were conducted separately by sex and race/ethnicity, with interactions among weight status, respondent sex, and race/ethnicity modeled in subsidiary analyses.

Results: Overweight status predicted earlier sexual intercourse among Hispanic females, whereas obese status predicted delayed sexual intercourse among white males, both relative to peers of the same race/ethnicity with healthy weight. Underweight status predicted delayed sexual intercourse among Hispanic males relative to peers with healthy weight. Significant differences by sex and race/ethnicity were observed in tests of interactions.

Methods: We studied 302 girls and 316 boys, with mean ages 52.24 and 52.35 months, respectively, in 1986, who were followed for 10 years. We excluded children who were initially overweight/obese. Mothers completed three DoR feeding questions in 1986: (1) child eating compliance of prompted foods; (2) child eating compliance of initially refused foods; and (3) mother-allotted child food choice. Child BMI (kg/m2) was calculated from measured weights and heights in 1986, 1988, 1992, 1994, and 1996.

Results: Daughters who complied with maternal food prompts [odds ratio (OR), 2.01] and those who obeyed maternal prompts to consume initially rejected foods (OR, 2.29) "most of the time" were significantly more likely than daughters who complied less frequently to become overweight/obese after 8 years. Also, more frequent eating compliance (p<0.001) and more frequent compliance of initially rejected foods (p=0.003) predicted greater BMI z-score gain in girls. These associations were not found for boys. Maternal obesity consistently predicted overweight/obesity risk in girls (ORs, 2.48–8.63) and boys (ORs, 2.27– 4.03).

METHODS: The study compares four- to five-year longitudinal data from a single-site cohort (N=106, 54% retained from 195 participants at baseline; 82% of those still at the school) pre- and postintervention in a rural middle school with high obesity rates with data from the 2006 Child Survey and 2010 Child and Young Adult Surveys from the National Longitudinal Survey of Youth 1979 (N=600), which serves as a nationally representative comparison group. Outcome measures include pre- and postchanges in weight category, BMI, BMI z-score, BMI percentile for age and gender, and rates of change per month in BMI measures.

RESULTS: At follow-up, change in percent overweight was significantly different between groups, with the MATCH group decreasing (20-12%) and the comparison group increasing (17-19%). Overall, the MATCH group had significantly higher decrease rates in BMI z-scores (p=0.002) and BMI percentile (p=0.01) than the comparison group. Of all adolescents at healthy weight at baseline, 2% from MATCH became overweight after five years, whereas 13% of the comparison group increased to overweight or obese (p=0.02) after four years.

CONCLUSIONS: Despite a small sample size and a high-risk setting, at long-term follow-up, a greater proportion of MATCH participants than in the comparison group decreased from overweight to healthy weight or remained at healthy weight. The MATCH results suggest that some proportion of high-risk adolescents can have their growth trajectory follow a healthier path than expected.