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Table 1 β-HCH (ng/g lipid) GM and GMRs by individual characteristics of the population

From: Predictors of Beta-Hexachlorocyclohexane blood levels among people living close to a chemical plant and an illegal dumping site

   Geometric meanGMRa
N%Mean95%CICrude95%CIAdjusted b95%CI
Total 602100.0726579
GenderM31051.56860781.00   1.00   
F29248.57666881.120.921.361.211.031.43
Age class (years)0–186611.02318301.00   1.00   
19–296010.03930501.701.19-2.421.701.19-2.43
30–398614.34233521.811.31-2.511.841.33-2.55
40–4913322.16655792.882.13-3.892.862.12-3.87
50–599615.9110931304.793.48-6.604.773.47-6.56
60–6911018.31351091665.884.31-8.025.954.36-8.11
> = 70518.523418030310.207.03-14.8110.607.30-15.39
BMI cNormal/underweight20033.24337501.00   1.00   
Overweight21435.57967931.841.47-2.301.351.11-1.65
Obese18831.2110941302.572.04-3.231.721.39-2.12
Educational level dLow15325.4117931471.00   1.00   
Medium40867.86155680.520.42-0.650.690.55-0.87
High416.85541730.470.31-0.700.690.471.02
Family size (people)16911.57658991.00   1.00   
212620.9103841271.370.961.951.260.941.71
36611.07152960.930.621.401.320.931.87
> = 434156.66255710.820.601.121.321.01-1.74
Having a relative with high β-HCH levels (> 150 ng/g lipids)No32954.75045561.00   1.00   
Yes27345.3111961282.211.83-2.652.452.11-2.85
Breast feeding (in the last 15 years, limited to women aged between 19 and 59 yrs)No54189.97568841.00   1.00   
Yes6110.14636590.610.45-0.850.640.47-0.88
Eating local/own production foodNo14423.94941581.00   1.00   
Yes45876.18172911.651.32-2.071.721.43-2.08
Washing with water from private wellsNo30851.25851661.00   1.00   
Yes29448.889781031.541.27-1.861.711.46-2.00
Drinking water from private wellsNo54590.56962761.00   1.00   
Yes579.5110831451.601.15-2.221.881.43-2.48
Cooking with water from private wellsNo34657.56355711.00   1.00   
Yes25642.586741001.381.14-1.681.561.33-1.84
Irrigating with water from private wellsNo27545.75951681.00   1.00   
Yes32754.38574971.431.18-1.741.591.36-1.87
  1. aGMR: geometric mean ratio
  2. bAdjusted by gender and age classes
  3. cBMI categorization:
  4.  Normal/underweight: < 25 kg/sm
  5.  Overweight: 25–29 kg/sm
  6.  Obese: > = 30 kg/sm
  7.  Obese: > = 30 kg/sm
  8. dEducational level categorization:
  9.  Low: junior high school or lower
  10.  Medium: high school
  11.  High: degree or higher