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Table 2 Distribution of BMI across different characteristics

From: Health literacy and the determinants of obesity: a population-based survey of sixth grade school children in Taiwan

  BMI
Characteristics Normal Underweight Overweight Obese P-value1
  n % n % n % n %  
Health literacy (quartiles)          <0.0001
 Lowest 25 % (0–21) 19,580 45.47 4,954 11.50 11,051 25.66 7,477 17.36  
 25th to 50th percentile (22–26) 22,971 48.01 5,276 11.03 12,110 25.31 7,491 15.66  
 50th to 75th percentile (27–29) 22,190 49.45 4,847 10.80 11,403 25.41 6,434 14.34  
 Highest 25 % (30–32) 13,360 50.56 2,938 11.12 6,859 25.96 3,268 12.37  
Sex          <0.0001
 Girl 42,204 53.25 10,299 13.00 18,957 23.92 7,790 9.83  
 Boy 35,897 43.27 7,716 9.30 22,466 27.08 16,880 20.35  
Ethnicity          <0.0001
 Hakka, Taiwanese, and Chinese 49,357 48.59 11,156 10.98 25,761 25.36 15,301 15.06  
 Indigenous 2751 44.97 467 7.63 1,777 29.05 1,123 18.36  
 Immigrants 1440 45.58 364 11.52 816 25.83 539 17.06  
 Others/Unknown/Uncertain 24,553 47.81 6,028 11.74 13,069 25.45 7,707 15.01  
Self-rated health status          <0.0001
 Bad or very bad 2351 24.15 1,127 11.58 2,486 25.53 3,772 38.74  
 Normal 27,917 44.98 7,028 11.32 16,493 26.57 10,631 17.13  
 Good 24,839 54.30 4,901 10.71 11,162 24.40 4,845 10.59  
 Very Good 22,994 51.49 4,959 11.10 11,282 25.26 5,422 12.14  
Healthy behaviors (Regular physical activity, Sugar-sweetened beverage (SSB) intake)          <0.0001
 Regular physical activity and no SSB intake 32,432 50.65 6,988 10.91 16,050 25.06 8,564 13.37  
 Had only one of the healthy behaviors (either regular physical activity or no SSB intake) 37,591 46.70 9,080 11.28 20,867 25.92 12,962 16.10  
 Had no regular physical activity and consumed SSB 8078 45.70 1,947 11.02 4,506 25.49 3,144 17.79  
  1. 1 Chi-square test showing bivariate association between BMI category and other variables