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Table 3 Descriptive data (GM and GSD) of ß -HCH (ng/g lipid) by the main population characteristics

From: A biomonitoring study on blood levels of beta-hexachlorocyclohexane among people living close to an industrial area

  N GM ± GSD pvalue*
TOTAL 216 60.58 ± 2.65  
Sex      0.2209
Males 110 55.93 ± 2.68  
Females 106 65.82 ± 2.62  
Age group (years)      <0.001
25-34 42 38.75 ± 3.04  
35-44 57 41.94 ± 2.48  
45-54 49 68.69 ± 2.31  
55-64 68 99.25 ± 2.18  
Level of education      <0.001
Primary school 108 89.86 ± 2.56  
High school 91 41.33 ± 2.38  
University degree 17 38.31 ± 2.05  
Smoking      0.2003
Never 124 65.19 ± 2.78  
Yes 92 54.88 ± 2.47  
Area of residence      <0.001
Area 1 (reference) 25 34.47 ± 1.91  
Area 2 (Colleferro urban/rural) 46 36.05 ± 2.17  
Area 3 (industrial) 39 43.82 ± 2.20  
Area 4 (river) 106 97.65 ± 2.59  
Distance from the river      <0.001
> 5 km 28 40.36 ± 1.80  
> 2–5 km 30 37.92 ± 2.65  
1-2 km 66 61.01 ± 2.32  
500 m-1 km 55 80.73 ± 2.82  
< 500 m 37 77.61 ± 3.07  
Use of private well water for drinking      <0.001
No 189 55.10 ± 2.54  
Yes 27 117.7 ± 2.81  
Use of private well water for cooking      <0.001
No 146 46.39 ± 2.48  
Yes 70 105.7 ± 2.39  
Use of private well water for personal cleaning     <0.001
No 138 44.69 ± 2.35  
Yes 78 103.8 ± 2.58  
Use of someone else’s well water      0.0666
No 212 59.58 ± 2.61  
Yes 4 146.9 ± 4.45  
Any use of well water      <0.001
No 129 42.87 ± 2.32  
Yes 87 101.1 ± 2.55  
Provenience of food      0.0006
Commercial 56 41.43 ± 2.05  
Local 99 62.38 ± 2.74  
Own production 61 81.87 ± 2.79  
  1. GM: Geometric Mean; GSD: Geometric Standard Deviation.
  2. * p-value from F-test performed on the log distribution of ß-HC.