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Table 1 Background information of school-aged children in the analytical dataset, El Salvador, 2015/2016

From: Overweight and obesity of school-age children in El Salvador according to two international systems: a population-based multilevel and spatial analysis

CharacteristicsBoys (n = 57,481)Girls (n = 54,510)
NumberPercentageNumberPercentage
Age in years, mean (sd1)7.4 (0.59) 7.4 (0.56) 
Place of residence
 Urban26,47446.025,86847.4
 Rural31,00753.928,64252.5
School type
 Public49,27285.746,47385.2
 Private820914.2803714.7
Child age in years
 6.0 to 6.910,51618.211,61721.3
 7.0 to 7.938,89067.636,78267.4
 8.0 to 8.9647811.250549.2
 9.0 to 9.915972.710571.9
Anthropometric measurements
 Height in cm mean (sd)120.5 (5.88) 119.7 (5.81) 
 Height-for-age Z-score mean (sd)−0.70 (1.04) −0.63 (1.01) 
 Weight in kg mean (sd)24.7 (5.46) 24.1 (5.39) 
 Weight-for-age Z-score mean (sd)−0.04 (1.33) −0.02 (1.33) 
 BMI kg/m2 mean (sd)16.8 (2.70) 16.7 (2.77) 
 WHO Z-score mean (sd)0.56 (1.41) 0.43 (1.24) 
 IOTF Z-score mean (sd)0.51 (1.18) 0.49 (1.17) 
  1. 1 sd: standard deviation
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