Annals of Occupational and Environmental Medicine

Table 3 General characteristics of bus company employees and propensity score matched controls

From: Cardiovascular disease risk differences between bus company employees and general workers according to the Korean National Health Insurance Data

		Bus company employees		Matched Controls(1:3)
		n	%	n	%	p-value
Total		15,719	100.0	47,257	100.0
Sex	Male	15,130	96.3	45,402	96.3	0.8841
Sex	Female	589	3.8	1755	3.7
Age	15–29	52	0.3	152	0.3	0.9999
	30–39	1088	6.9	3268	6.9
	40–49	5656	36.0	16,968	36.0
	50–59	7638	48.6	22,914	48.6
	> 60	1285	8.2	3855	8.2
Income level	25%P	181	1.2	573	1.2	0.9099
	50%P	640	4.1	1888	4.0
	75%P	13,072	83.2	39,230	83.2
	100%P	1826	11.6	5466	11.6
Obesity^a	yes	6410	40.8	19,254	40.8	0.9179
Obesity^a	no	9309	59.2	27,903	59.2
Smoking	yes	3756	23.9	11,234	23.8	0.8542
Smoking	no	11,963	76.1	35,923	76.2
Heavy drinking^b	yes	3104	19.8	9346	19.8	0.8533
Heavy drinking^b	no	12,615	80.3	37,811	80.2
Lack of exercise^c	yes	5904	37.6	17,742	37.6	0.8941
Lack of exercise^c	no	9815	62.4	29,415	62.4

^aObesity is defined as having a body mass index of > 25 kg/m²
^bHeavy drinking is defined as a person who reportedly drink > 7 glasses of alcoholic beverage in a week
^cLack of exercise is defined as performing moderate to high-intensity exercises in < 3 times a week

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ISSN: 2052-4374

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