Table 4.

Odds ratios of occupational injuries associated with PSHI in the high-risk group

Variables	Occupational injuries (high-risk group)
	Crude		Model Ia		Model IIb
	OR	95% CI	OR	95% CI	OR	95% CI
Provision of safety and health information (ref.c Yes) No	1.392	1.055–1.837	1.454	1.095–1.932	1.812	1.330–2.468
Age (years) (ref. 15–29) 30–39			1.560	0.750–3.242	1.420	0.668–3.018
40–49			0.854	0.481–1.517	0.881	0.495–1.569
50–59			0.661	0.392–1.113	0.678	0.402–1.144
≥ 60			1.196	0.711–2.013	1.241	0.736–2.093
Sex (ref. Male) Female			0.953	0.688–1.320	1.337	0.944–1.893
Education level (ref. Middle school or below) High school			0.610	0.354–1.050	0.784	0.455–1.352
College or above			0.649	0.464–0.908	0.802	0.571–1.127
Monthly income (KRW 10,000) (ref. <150) 150–249			1.557	0.758–3.198	1.382	0.662–2.888
250–399			0.715	0.385–1.328	0.853	0.452–1.608
≥ 400			0.808	0.436–1.496	1.013	0.541–1.897
Working hours per a week (hours) (ref. <40) 41–52					1.672	0.982–2.848
53–60					0.934	0.562–1.552
≥ 61					0.708	0.423–1.185
Tenure (years) (ref. <1) 1–5					1.867	1.045–3.338
≥ 5					0.998	0.734–1.356
Labor unions (ref. Yes) No					1.704	1.044–2.781
Physical risk factors (ref. No) Yes					1.435	0.978–2.107
Biochemical risk factors (ref. No) Yes					1.230	0.896–1.688
Usage of personal protective equipment (ref. No need) Need/wear					2.030	1.096–3.760
Need/no wear					0.828	0.463–1.480

^aAdjusted for general characteristics (age, sex, education level, monthly income)

^bAdjusted for general characteristics (age, sex, education level, monthly income), occupational characteristics (working hours per a week, tenure, labor unions), and job-related factors (physical risk factors, biochemical risk factors, personal protective equipment)

^cReference group