Reductions in the Energy Content of Meals Served in the Chilean National Nursery School Council Program Did Not Consistently Decrease Obesity among BeneficiariesReportar como inadecuado




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Resumen

In 2001, the Chilean National Nursery Schools Council Program reduced by 10% the energy content similar to 418.7 kJ of meals served to children to reduce obesity. We assessed the impact of this measure on obesity and stunting among beneficiaries 2-5 y old. The energy reduction was staggered over 3 y, allowing for a quasi-experimental design involving early 2001, mid 2002, and late 2003 intervention groups. Routine anthropometric measurements similar to 64,000-y taken from 19962005 were obtained from registries; obesity BMI-for-age Z-score >= 2 SD and stunting height-for-age Z-score : 2 SD were defined using the 2006 growth standards. Segmented regression analyses were conducted by intervention group to contrast pre- and postintervention trends. Overall, obesity was high 15.9%, with levels consistently higher in fall and winter as reported in other studies. Preintervention obesity trends increased in the early group P = 0.001 but decreased in the late intervention group P 0,02. The impact of the energy reduction on obesity was inconsistent, with reductions in the early group P < 0.01 but with no change in mid and late intervention groups P > 0.05. Stunting prevalence was almost as low as in the growth standard 3.2 vs. 2.3% and decreased preintervention in all groups P < 0.05. Stunting prevalence increased postintervention P < 0.05 in all but the late intervention group, where there was no change. Despite a robust design and the ability to detect small seasonal changes in obesity, our analyses showed that the 10% energy reduction did not consistently decrease obesity. The intervention may have slowed improvements in linear growth, but concern is tempered by the near absence of growth failure.



Autor: Corvalán Aguilar, Camila; - Uauy Dagach-Imbarack, Ricardo; - Flores, Rafael; - Kleinbaum, David; - Martorell, Reynaldo; -

Fuente: http://repositorio.uchile.cl/



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