Table 2.

Association of individual habits and characteristics with β-HCH haematic concentration (ng/g lipid)

	N	%	GMRa	p-value	95%CI
Gender
M	310	51.5	1.00
F	292	48.5	1.32	0.000	1.14	–	1.53
Age class (years)
0–18	66	11.0	1.00
19–29	60	10.0	2.01	0.000	1.37	–	2.94
30–39	86	14.3	2.08	0.000	1.44	–	3.01
40–49	133	22.1	3.32	0.000	2.35	–	4.70
50–59	96	15.9	4.80	0.000	3.30	–	6.97
60–69	110	18.3	5.83	0.000	3.87	–	8.76
> =70	51	8.5	10.0	0.000	6.65	–	15.1
BMIb
Normal/underweight	200	33.2	1.00
Overweight	214	35.5	1.29	0.019	1.04	–	1.61
Obese	188	31.2	1.63	0.000	1.28	–	2.08
Breast feeding (if occurred in the last 15 years, limited to women aged between 19 and 59 yrs)
No	541	89.9	1.00
Yes	61	10.1	0.64	0.004	0.47	–	0.86
Eating local/own production food
No	144	23.9	1.00
Yes	458	76.1	1.47	0.002	1.15	–	1.88
Drinking water from private wells
No	545	90.5	1.00
Yes	57	9.5	1.47	0.048	1.00	–	2.14
Washing with water from private wells
No	308	51.2	1.00
Yes	294	48.8	1.48	0.001	1.17	–	1.87

^aGMR Geometric mean ratio

^bBMI categorization:

Normal/underweight: < 25 kg/sm

Overweight: 25–29 kg/sm

Obese: > = 30 kg/sm

Standard errors were corrected to account for correlation between subjects nested in families (sandwich estimators)