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Association of iron supplementation and dietary diversity with nutritional status and learning outcomes among adolescents: Results from a longitudinal study in Uttar Pradesh and Bihar, India.

ABSTRACT:

Background

Poor nutritional status and educational outcomes are associated with adverse health consequences throughout the life course.

Objectives

We examined the associations of sex, iron and folic acid (IFA) supplementation, deworming, and dietary diversity with nutritional status and learning outcomes among Indian adolescents.

Methods

Data of 12 035 adolescents from two rounds (2015-16 and 2018-19) of the Understanding the Lives of Adolescents and Young Adults surveys in Uttar Pradesh and Bihar, India were used. Multivariate linear and logistic regression models were used to estimate the prospective relationships of explanatory variables in the first round of the survey with nutritional status (ie, hemoglobin, BMI- and height-for-age z-scores, and incidence of anemia, stunting, and underweight) and learning outcomes (ie, reading proficiency, math proficiency, and school dropout) in the second round of the survey. The multivariable models were adjusted for a range of confounders, clustering by the population sampling unit and sampling weights.

Results

Girls had a lower hemoglobin (adjusted mean difference (aMD) = -2.07; 95% confidence interval (CI) = -2.20, -1.94; P < 0.001) and height-for-age z-score (aMD = -0.45; 95% CI = -0.53, -0.38; P < 0.001) and higher BMI-for-age z-score (aMD = 0.36; 95% CI = 0.27, 0.44; P < 0.001) compared to boys. Girls had poorer reading (adjusted odds ratio (aOR) = 0.81; 95% CI = 0.70, 0.95; P = 0.01) and math proficiency (adjusted odds ratio aOR = 0.36; 95% CI = 0.31, 0.42; P < 0.001), and increased risk of school dropout (aOR = 1.65; 95% CI = 1.40, 1.95; P < 0.001) than boys. Receiving IFA tablets was not significantly associated with hemoglobin levels of adolescents overall, however we noted a significant beneficial relationship among girls (aMD = 0.41; 95% CI = 0.00, 0.82) but not among boys (aMD = 0.02; 95% CI = -0.38, 0.43) (P for interaction = 0.09). Receiving IFA tablets was positively associated with reading proficiency (aOR = 1.47; 95% CI = 1.07, 2.01; P = 0.02), math proficiency (aOR = 1.51; 95% CI = 1.16, 1.98; P < 0.001) and a reduced risk of school dropout (aOR = 0.72; 95% CI = 0.54, 0.96; P = 0.03). Deworming was not associated with nutritional status and learning outcomes. Diverse dietary intake was positively associated with hemoglobin, height-for-age z-score and math proficiency, and a reduced risk of school dropout in adolescents.

Conclusion

Integrated nutritional and health interventions and strengthening the existing nutrition supplementation program are critical to address adolescents' nutritional needs and improve educational outcomes.

SUBMITTER: Shinde S

PROVIDER: S-EPMC8325919 | biostudies-literature |

REPOSITORIES: biostudies-literature

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