Relative Telomere Length in Peripheral Blood Cells and Hypertension Risk among Mine Workers: A Case-Control Study in Chinese Coal Miners

Table 4

Univariate logistic regression of EH and other variables.

Characteristics		Case	Control	value	OR	95% CI
		(%)	(%)			Upper limit	Lower limit
Age	≤30	18 (8.4)	16 (7.2)
	30~40	56 (26.0)	57 (25.7)	0.729	0.873	0.405	1.882
	40~50	79 (36.7)	76 (34.2)	0.835	0.924	0.439	1.943
	>50	62 (28.8)	73 (32.9)	0.465	0.755	0.355	1.604
Gender	Male	194 (90.2)	200 (90.1)
	Female	21 (9.8)	22 (9.9)	0.960	0.984	0.524	1.847
Education	College or higher	16 (7.4)	28 (12.6)
	Senior middle school	135 (62.8)	131 (59.0)	0.080	1.803	0.932	3.488
	Junior middle school	54 (25.1)	56 (25.2)	0.154	1.688	0.822	3.464
	Primary school and less than primary school	10 (4.7)	7 (3.2)	0.117	2.500	0.796	7.853
Work type	Hard physical labour	52 (24.2)	71 (32.0)
	Light physical labour	113 (52.6)	102 (45.9)	0.069	1.513	0.968	2.365
	Nonphysical labour	50 (23.3)	49 (22.1)	0.222	1.393	0.818	2.372
Work duration	≤1 year	5 (2.3)	6 (2.7)
	2~ years	18 (8.4)	21 (9.5)	0.967	1.029	0.268	3.942
	4~ years	36 (16.7)	70 (31.5)	0.450	0.617	0.176	2.161
	11~ years	27 (12.6)	26 (11.7)	0.741	1.246	0.339	4.588
	16~ years	28 (13.0)	27 (12.2)	0.741	1.244	0.339	4.563
	≥21 years	101 (47.0)	72 (32.4)	0.405	1.683	0.495	5.729
Workplace	Underground	52 (24.2)	71 (32.0)
	Underground auxiliary	68 (31.6)	69 (31.1)	0.235	1.346	0.824	2.197
	Ground	55 (25.6)	46 (20.7)	0.070	1.633	0.961	2.775
	Office workers	40 (18.6)	36 (16.2)	0.155	1.517	0.854	2.696
BMI	<18.5	1 (0.5)	11 (5.0)
	18.5~24	55 (25.6)	94 (42.3)	0.078	6.436	0.809	51.209
	24~28	95 (44.2)	91 (41.0)	0.021	11.484	1.453	90.751
	≥28	64 (29.8)	26 (11.7)	0.002	27.077	3.325	220.507
Alcohol consumption	No	111 (51.6)	158 (71.2)
	Yes	104 (48.4)	64 (28.8)	<0.001	2.313	1.559	3.433
Current smoking	No	89 (41.4)	124 (55.9)
	Yes	126 (58.6)	98 (44.1)	0.003	1.791	1.226	2.617
Tea consumption	No	138 (64.2)	138 (62.2)
	Yes	77 (35.8)	84 (37.8)	0.661	0.917	0.621	1.352
RTL	<0.57927	66 (30.7)	44 (19.8)
	0.57927~1.45126	91 (42.3)	127 (57.2)	0.002	0.478	0.299	0.762
	>1.45126	58 (27.0)	51 (23.0)	0.311	0.758	0.444	1.296

and the difference is statistically significant. Abbreviations: RTL: relative telomere length; BMI: body mass index.