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

Table 5

Multifactor 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)	0.246	0.557	0.208	1.496
	40~50	79 (36.7)	76 (34.2)	0.059	0.371	0.133	1.037
	>50	62 (28.8)	73 (32.9)	0.010	0.241	0.081	0.716
Gender	Male	194 (90.2)	200 (90.1)
	Female	21 (9.8)	22 (9.9)	0.890	0.943	0.409	2.172
Education	College or higher	16 (7.4)	28 (12.6)
	Senior middle school	135 (62.8)	131 (59.0)	0.175	1.811	0.768	4.266
	Junior middle school	54 (25.1)	56 (25.2)	0.090	2.422	0.872	6.728
	Primary school and less than primary school	10 (4.7)	7 (3.2)	0.101	3.470	0.785	15.344
Work type	Hard physical labour	52 (24.2)	71 (32.0)
	Light physical labour	113 (52.6)	102 (45.9)	0.390	1.336	0.691	2.582
	Nonphysical labour	50 (23.3)	49 (22.1)	0.352	1.524	0.627	3.705
Work duration	≤1 year	5 (2.3)	6 (2.7)
	2~ years	18 (8.4)	21 (9.5)	0.842	0.861	0.196	3.779
	4~ years	36 (16.7)	70 (31.5)	0.687	0.749	0.183	3.060
	11~ years	27 (12.6)	26 (11.7)	0.634	1.429	0.328	6.227
	16~ years	28 (13.0)	27 (12.2)	0.697	1.343	0.305	5.917
	≥21 years	101 (47.0)	72 (32.4)	0.181	2.605	0.641	10.588
Workplace	Underground	52 (24.2)	71 (32.0)
	Underground auxiliary	68 (31.6)	69 (31.1)	0.429	1.310	0.672	2.554
	Ground	55 (25.6)	46 (20.7)	0.332	1.466	0.677	3.175
	Office workers	40 (18.6)	36 (16.2)	0.220	1.781	0.709	4.475
BMI	<18.5	1 (0.5)	11 (5.0)
	18.5~24	55 (25.6)	94 (42.3)	0.086	6.659	0.766	57.906
	24~28	95 (44.2)	91 (41.0)	0.032	10.580	1.222	91.600
	≥28	64 (29.8)	26 (11.7)	0.004	23.914	2.682	213.214
Alcohol consumption	No	111 (51.6)	158 (71.2)
	Yes	104 (48.4)	64 (28.8)	0.002	2.103	1.311	3.375
Current smoking	No	89 (41.4)	124 (55.9)
	Yes	126 (58.6)	98 (44.1)	0.014	1.812	1.126	2.916
Tea consumption	No	138 (64.2)	138 (62.2)
	Yes	77 (35.8)	84 (37.8)	0.037	0.609	0.383	0.970
RTL	<0.57927	66 (30.7)	44 (19.8)
	0.57927~1.45126	91 (42.3)	127 (57.2)	0.018	0.529	0.312	0.897
	>1.45126	58 (27.0)	51 (23.0)	0.551	0.827	0.443	1.544

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