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Table 4 Association of characteristics of the population with β-HCH level (ng/g lipid): GMR from multiple linear regression in the whole population and stratified by sub-area

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

 

β-HCH

β-HCH

β-HCH

(Area 1–4)

(Area 4)

(Area 1–3)

 

GMR

95%CI

GMR

95%CI

GMR

95%CI

Sex

Males

1.00

 

1.00

 

1.00

 

Females

1.20

0.98-1.47

1.17

0.84-1.65

1.30

1.03-1.63

Age group (years)

25-34

1.00

 

1.00

 

1.00

 

35-44

1.34

0.99-1.80

1.28

0.77-2.13

1.56

1.12-2.17

45-54

1.92

1.40-2.62

1.56

0.94-2.58

2.48

1.75-3.53

55-64

2.76

2.04-3.74

2.51

1.52-4.13

3.51

2.49-4.95

Level of Education

Primary school

1.00

 

1.00

 

1.00

 

Secondary school

0.78

0.62-0.98

0.81

0.54- 1.21

0.81

0.64-1.02

University degree

0.86

0.57-1.29

0.91

0.41-1.99

0.93

0.63-1.37

Area of residence*

Area 1

1.00

     

Area 2

0.98

0.68-1.41

    

Area 3

1.32

0.91-1.93

    

Area 4

2.00

1.36-2.94

    

Any use of well water

No

1.00

 

1.00

 

1.00

 

Yes

1.42

1.08-1.88

1.46

0.97-2.20

1.42

0.97-2.08

Provenience of food§

Commercial

1.00

 

1.00

 

1.00

 

Local

1.16

0.89-1.52

1.75

0.97-3.18

1.00

0.78-1.29

Own production

1.26

0.94-1.69

2.27

1.24-4.13

0.75

0.55-1.01

Consume of Beef§

 None/commercial

1.00

 

1.00

 

1.00

 

 Local

0.91

0.61-1.35

0.84

0.50-1.43

0.81

0.36-1.83

 Own production

1.88

1.35-2.63

1.67

1.09-2.57

dropped

Consume of Chickens§

 None/commercial

1.00

 

1.00

 

1.00

 

 Local

1.08

0.72-1.60

1.06

0.56- 1.98

1.33

0.73-2.43

 Own production

1.36

0.99-1.85

1.63

1.04-2.55

0.67

0.36-1.83

  1. *Area 1: reference; Area 2: Colleferro urban/rural; Area 3: industrial; Area 4: river.
  2. GMR: Geometric Mean Ratio from multivariate linear regression model.
  3. 95%CI: 95% Confidence Intervals.
  4. § the model with the variables consume of beef and consume of chicken is alternative to the model with the variable provenience of food.