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Table 1 General characteristics of study population by air pollution

From: Air pollution and urinary n-acetyl-B-glucosaminidase levels in residents living near a cement plant

Variables Total LEG MEG-R MEG-D P-value
n % n % n % n %
Sex
 Male 203 37.1 19 28.8 105 38.6 79 37.8 0.323
 female 344 62.9 47 71.2 167 61.4 130 62.2
Age, years
 40–59 185 33.8 19 28.8 96 35.3 70 33.5 0.600
  ≥ 60 362 66.2 47 71.2 176 64.7 139 66.5
Occupation
 non-manual 370 67.6 28 42.4 162 59.6 180 86.1 <0.001
 manual 177 32.4 38 57.6 110 40.4 29 13.9
Smoking
 none 452 82.6 57 86.4 226 83.1 169 80.9 0.567
 current 95 17.4 9 13.6 46 16.9 40 19.1
HTN, mmHg
  < 140/90 410 75.0 50 75.8 208 76.5 152 72.7 0.635
  ≥ 140/90 137 25.0 16 24.2 64 23.5 57 27.3
HbA1c, %
  < 6.5 449 82.1 46 69.7 223 82.0 180 86.1 0.010
  ≥ 6.5 98 17.9 20 30.3 49 18.0 29 13.9
Total 547 100.0 66 100.0 272 100.0 209 100.0  
  1. p-value by Chi-square test; non-manual: office work; the unemployed; manual: farmer, labor, construction, blue collar job
  2. LEG ‘less exposed group’ who lived 5 km or more away from the cement plant
  3. MEG ‘more exposed group’ who lived within the 1 km radius of the cement plant
  4. MEG-R MEG in rural area; MEG-D: MEG in downtown