Background El Ni?o is responsible for natural disasters and infectious disease outbreaks worldwide. During the 1997–1998 El Ni?o , northern Peru endured extreme rainfall and flooding. Since short stature may occur as a result of undernutrition or repeated infections during childhood, both of which are highly prevalent during natural disasters, we sought to determine if the 1997–1998 El Ni?o had an adverse effect on stature and body composition a decade later. In 2008–2009, we measured height, weight, and bioimpedance in a random sample of 2,095 children born between 1991 and 2001 in Tumbes, Peru.ResultsHeight-for-age increased by 0.09 SD/year of birth between 1991 and 1997 ( P ?0.001), indicating overall improvements in health over time in the study area; however, this rate fell to 0.04 SD/year of birth during and shortly after El Ni?o , less than half the rate prior to El Ni?o ( P ?=?0.046). Height shortfalls were even greater in children residing in households most likely to be flooded after El Ni?o . Any improvement over time was completely blunted and became negative in children living in households with flood likelihoods of ≥7% ( P ?=?0.001). In the subset of 912 children with bioimpedance measurements, those born after the onset of El Ni?o had less lean mass ( P ?0.001), whereas fat mass was unaffected ( P ?=?0.48).ConclusionsChildren born during and after 1997–1998 El Ni?o were on average shorter and had less lean mass for their age and sex than expected had El Ni?o not occurred. The effects of El Ni?o on health are long lasting and, given its cyclical nature, may continue to negatively impact future generations.
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