. 2020 Jan 22;19:9. doi: 10.1186/s12940-020-0562-7

Table 1.

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

				Geometric mean				GMR^a
		N	%	Mean	95%CI			Crude	95%CI			Adjusted ^b	95%CI
Total		602	100.0	72	65	–	79	–	–	–	–	–	–	–	–
Gender	M	310	51.5	68	60	–	78	1.00				1.00
Gender	F	292	48.5	76	66	–	88	1.12	0.92	–	1.36	1.21	1.03	–	1.43
Age class (years)	0–18	66	11.0	23	18	–	30	1.00				1.00
	19–29	60	10.0	39	30	–	50	1.70	1.19	-	2.42	1.70	1.19	-	2.43
	30–39	86	14.3	42	33	–	52	1.81	1.31	-	2.51	1.84	1.33	-	2.55
	40–49	133	22.1	66	55	–	79	2.88	2.13	-	3.89	2.86	2.12	-	3.87
	50–59	96	15.9	110	93	–	130	4.79	3.48	-	6.60	4.77	3.47	-	6.56
	60–69	110	18.3	135	109	–	166	5.88	4.31	-	8.02	5.95	4.36	-	8.11
	> = 70	51	8.5	234	180	–	303	10.20	7.03	-	14.81	10.60	7.30	-	15.39
BMI ^c	Normal/underweight	200	33.2	43	37	–	50	1.00				1.00
	Overweight	214	35.5	79	67	–	93	1.84	1.47	-	2.30	1.35	1.11	-	1.65
	Obese	188	31.2	110	94	–	130	2.57	2.04	-	3.23	1.72	1.39	-	2.12
Educational level ^d	Low	153	25.4	117	93	–	147	1.00				1.00
	Medium	408	67.8	61	55	–	68	0.52	0.42	-	0.65	0.69	0.55	-	0.87
	High	41	6.8	55	41	–	73	0.47	0.31	-	0.70	0.69	0.47	–	1.02
Family size (people)	1	69	11.5	76	58	–	99	1.00				1.00
	2	126	20.9	103	84	–	127	1.37	0.96	–	1.95	1.26	0.94	–	1.71
	3	66	11.0	71	52	–	96	0.93	0.62	–	1.40	1.32	0.93	–	1.87
	> = 4	341	56.6	62	55	–	71	0.82	0.60	–	1.12	1.32	1.01	-	1.74
Having a relative with high β-HCH levels (> 150 ng/g lipids)	No	329	54.7	50	45	–	56	1.00				1.00
	Yes	273	45.3	111	96	–	128	2.21	1.83	-	2.65	2.45	2.11	-	2.85
Breast feeding (in the last 15 years, limited to women aged between 19 and 59 yrs)	No	541	89.9	75	68	–	84	1.00				1.00
	Yes	61	10.1	46	36	–	59	0.61	0.45	-	0.85	0.64	0.47	-	0.88
Eating local/own production food	No	144	23.9	49	41	–	58	1.00				1.00
Eating local/own production food	Yes	458	76.1	81	72	–	91	1.65	1.32	-	2.07	1.72	1.43	-	2.08
Washing with water from private wells	No	308	51.2	58	51	–	66	1.00				1.00
Washing with water from private wells	Yes	294	48.8	89	78	–	103	1.54	1.27	-	1.86	1.71	1.46	-	2.00
Drinking water from private wells	No	545	90.5	69	62	–	76	1.00				1.00
Drinking water from private wells	Yes	57	9.5	110	83	–	145	1.60	1.15	-	2.22	1.88	1.43	-	2.48
Cooking with water from private wells	No	346	57.5	63	55	–	71	1.00				1.00
Cooking with water from private wells	Yes	256	42.5	86	74	–	100	1.38	1.14	-	1.68	1.56	1.33	-	1.84
Irrigating with water from private wells	No	275	45.7	59	51	–	68	1.00				1.00
Irrigating with water from private wells	Yes	327	54.3	85	74	–	97	1.43	1.18	-	1.74	1.59	1.36	-	1.87

^aGMR: geometric mean ratio

^bAdjusted by gender and age classes

^cBMI categorization:

Normal/underweight: < 25 kg/sm

Overweight: 25–29 kg/sm

Obese: > = 30 kg/sm

^dEducational level categorization:

Low: junior high school or lower

Medium: high school

High: degree or higher