Table 2 The socio-demographic characteristics of participants before and after PSM between workplace violence and non-workplace violence
Variables | Before PSM analysis (N = 1774) | χ2 | P | After PSM analysis(N = 1082) | χ2 | P | ||
|---|---|---|---|---|---|---|---|---|
Non-workplace violence (N = 1215) | workplace violence (N = 559) | Non-workplace violence (N = 541) | workplace violence (N = 541) | |||||
Sex |  |  | 14.75 | < 0.001 |  |  | 0.06 | 0.805 |
 Women | 1159(69.6) | 507(30.4) |  |  | 505(49.9) | 507(50.1) |  |  |
 Men | 56(51.9) | 52(48.1) |  |  | 36(51.4) | 34(48.6) |  |  |
Ethnic | Â | Â | 1.89 | 0.170 | Â | Â | 0.07 | 0.790 |
 Han | 886(69.4) | 390(30.6) |  |  | 383(50.3) | 379(49.7) |  |  |
 Others | 329(66.1) | 169(33.9) |  |  | 158(49.4) | 162(50.6) |  |  |
BMI group | Â | Â | 0.70 | 0.873 | Â | Â | 0.07 | 0.995 |
 Normal | 776(68.3) | 360(31.7) |  |  | 350(49.9) | 351(50.1) |  |  |
 Thin | 135(70.7) | 56(29.3) |  |  | 55(49.5) | 56(50.5) |  |  |
 Overweight | 230(67.4) | 111(32.6) |  |  | 106(50.7) | 103(49.3) |  |  |
 Obese | 74(69.8) | 32(30.2) |  |  | 30(49.2) | 31(50.8) |  |  |
Marital status | Â | Â | 2.02 | 0.364 | Â | Â | 1.66 | 0.436 |
 Unmarried | 365(70.6) | 152(29.4) |  |  | 144(49.7) | 146(50.3) |  |  |
 Married | 809(67.4) | 391(32.6) |  |  | 373(49.6) | 379(50.4) |  |  |
 Divorce/others | 41(71.9) | 16(28.1) |  |  | 24(60.0) | 16(40.0) |  |  |
 Residence |  |  | 1.98 | 0.159 |  |  | 0.14 | 0.712 |
 Rural | 747(69.7) | 324(30.3) |  |  | 314(50.5) | 308(49.5) |  |  |
 Urban | 468(66.6) | 235(33.4) |  |  | 227(49.3) | 233(50.7) |  |  |
Education level | Â | Â | 0.48 | 0.487 | Â | Â | 0.07 | 0.796 |
 High school or lower | 427(69.5) | 187(30.5) |  |  | 171(49.4) | 180(50.6) |  |  |
 Bachelor degree or above | 788(67.9) | 372(32.1) |  |  | 365(50.3) | 361(49.7) |  |  |
Only children | Â | Â | 0.34 | 0.560 | Â | Â | 0.03 | 0.866 |
 Yes | 198(70.0) | 85(30.0) |  |  | 84(50.6) | 82(49.4) |  |  |
 No | 1017(68.2) | 474(31.8) |  |  | 457(49.9) | 459(50.1) |  |  |
Income (monthly) | Â | Â | 6.46 | 0.091 | Â | Â | 3.04 | 0.385 |
 3000 or lower | 351(70.5) | 147(29.5) |  |  | 159(52.5) | 144(47.5) |  |  |
 3001–5000 | 540(69.1) | 242(30.9) |  |  | 224(49.0) | 233(51.0) |  |  |
 5001–7000 | 204(62.8) | 121(37.2) |  |  | 99(46.3) | 115(53.7) |  |  |
 7000 or higher | 120(71.0) | 49(29.0) |  |  | 59(54.6) | 49(45.4) |  |  |
|  | Mean ± SD | Mean ± SD | T | P | Mean ± SD | Mean ± SD | T | P |
Age | 31.78 ± 7.79 | 32.48 ± 8.40 | -1.72 | 0.085 | 32.57 ± 7.94 | 32.60 ± 8.50 | -0.08 | 0.938 |
Experience (years) | 10.58 ± 8.35 | 11.37 ± 8.95 | -1.80 | 0.072 | 11.37 ± 8.55 | 11.52 ± 9.04 | -0.27 | 0.790 |