Effects of Occupational Hazards on Job Stress and Mental Health of Factory Workers and Miners: A Propensity Score Analysis

Table 1

Characteristics of factory workers and miners.

Items	Groups	Case number	Percentage (%)
Sex	Male	4017	65.64
	Female	2103	34.36
Ethnicity	Han	5016	81.96
	Other	1104	18.04
Education level	Junior high school and below	652	10.65
	High school	1227	20.05
	Junior college	2722	44.48
	Bachelor’s degree or above	1519	24.82
Labor contracts	Signed	5896	96.34
	Unsigned	224	3.66
Professional title	None	2349	38.38
	Primary	1326	21.67
	Middle	1483	24.23
	Senior	962	15.72
Work schedule	Day shift	3289	53.74
	Night shift	201	3.28
	Shift	1897	31
	Day and night shifts	733	11.98
Marital status	Unmarried	857	14
	Married	4864	79.48
	Divorced	357	5.83
	Widowed	42	0.69
Monthly income (yuan)	<3000	1656	27.06
	~3000	2093	34.2
	~4000	1329	21.72
	~5000	659	10.77
	~6000	205	3.35
	~7000	86	1.41
	~8000	92	1.5
Chronic disease	Diabetes	364	5.95
	Hypertension	1220	19.93
Age (years)	<25	319	5.21
	~25	634	10.36
	~30	790	12.91
	~35	704	11.5
	~40	723	11.81
	~45	2950	48.2
Working years (years)	<5	920	15.03
	~5	831	13.58
	~10	840	13.73
	~15	319	5.21
	~20	695	11.36
	~25	1266	20.69
	~30	1249	20.41
Working hours per day (hours)	≤7	975	15.93
	>7	5145	84.07
Working days per week (days)	≤5	4006	65.46
	>5	2114	34.54
Occupational hazards	Coal dust	1446	23.63
	Silica dust	622	10.16
	Asbestos dust	935	15.28
	Benzene	1947	31.81
	Lead	353	5.77
	Noise	4545	74.26
	Brucellosis	108	1.76