Objective: Although there are more studies showing higher asthma prevalence in urban rather than rural zones, few assessed asthma mortality by zone in children. The objective of this study is to compare asthma mortality rates (AMR) by zone of residence of Mexican children.
Design: Using national death certificate and population projections data, AMR were compared in children aged 0 to 14 years by gender, age group, and zone of residence from 1999 to 2016. AMR trends were calculated using Joinpoint regression.
Results: Of the 680 823 deaths, 2464 (0.36%) were due to asthma. Asthma mortality was higher in rural (0.65%) than urban (0.26%) zones, P < .0001. Whole period AMR median was also higher in rural vs urban zones (0.6 vs 0.3, respectively), P < .05. The average annual percent change (AAPC) of AMR for the whole period was -5.1 in all children with a higher percent decrease in rural vs urban zones (girls' AAPC = -6.3 vs -4.1, respectively and boys' AAPC = -4.8 vs -4.2, respectively). AMR decreased in children aged 0 to 4 from both zones (rural's AAPC: girls = -7.9, boys = -5.2; urban's AAPC: girls = -5.1, boys = -5.4), P < .05. No trend was found in children aged 5 to 14.
Conclusions: Asthma mortality in Mexican children is higher in rural than urban zones. The decrease of mortality over time in early childhood is reassuring. More research is needed to determine reasons for higher mortality in rural Mexico and for the lack of a favorable decreasing trend in children aged 5 to 14 from both zones.
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