Table 2 The socio-demographic characteristics of participants before and after PSM.
Variables | N (%) | Before PSM analysis (N = 2736) | χ2 | P | After PSM analysis (N = 1588) | χ2 | P | ||
|---|---|---|---|---|---|---|---|---|---|
ACE (NO) N = 1942 | ACE (YES) N = 794 | ACE (NO) N = 794 | ACE (YES) N = 794 | ||||||
Sex | 10.93 | 0.001 | 0.134 | 0.714 | |||||
Men | 1129 (41.3%) | 840 (43.3%) | 289 (36.4%) | 282 (35.5%) | 289 (36.4%) | ||||
Women | 1607 (58.7%) | 1102 (56.7%) | 505 (63.6%) | 512 (64.5%) | 505 (63.6%) | ||||
Grade | 38.01 | < 0.001 | 2.091 | 0.719 | |||||
The first year | 592 (21.6%) | 465 (23.9%) | 127 (16.0%) | 125 (15.7%) | 127 (16.0%) | ||||
The second year | 688 (25.1%) | 490 (25.2%) | 198 (24.9%) | 182 (22.9%) | 198 (24.9%) | ||||
The Junior year | 968 (35.4%) | 686 (35.3%) | 282 (35.5%) | 302 (38.0%) | 282 (35.5%) | ||||
The Senior year | 419 (15.3%) | 262 (13.5%) | 157 (19.8%) | 161 (20.3%) | 157 (19.8%) | ||||
The fifth year | 69 (2.6%) | 39 (2.0%) | 30 (3.8%) | 24 (3.0%) | 30 (3.8%) | ||||
Academic field | 11.40 | 0.022 | 1.029 | 0.905 | |||||
Science | 490 (17.9%) | 329 (16.9%) | 161 (20.3%) | 153 (19.3%) | 161 (20.3%) | ||||
Engineering | 565 (20.7%) | 417 (21.5%) | 148 (18.6%) | 157 (19.8%) | 148 (18.6%) | ||||
Literature | 473 (17.3%) | 317 (16.3%) | 156 (19.6%) | 145 (18.3%) | 156 (19.6%) | ||||
Medicine | 610 (22.3%) | 440 (22.7%) | 170 (21.4%) | 174 (21.9%) | 170 (21.4%) | ||||
Others | 598 (21.9%) | 439 (22.6%) | 159 (20.0%) | 165 (20.8%) | 159 (20.0%) | ||||
Only children | 6.11 | 0.013 | 0.788 | 0.375 | |||||
Yes | 2012(73.5%) | 1454 (74.9%) | 558 (70 .3%) | 574 (72.3%) | 558 (70 .3%) | ||||
No | 724(26.5%) | 488 (25.1%) | 236 (29.7%) | 220 (27.7%) | 236 (29.7%) | ||||
Residence | 0.105 | 0.746 | 0.909 | 0.340 | |||||
City | 1372 (50.1%) | 970 (49.9%) | 402 (50.6%) | 383 (48.2%) | 402 (50.6%) | ||||
Countryside | 1324(49.9%) | 972 (50.1%) | 392 (49.4%) | 411 (51.8%) | 392 (49.4%) | ||||
Mean ± SD | Mean ± SD | T | P | Mean ± SD | Mean ± SD | T | P | ||
Age | 20.39 ± 1.43 | 20.71 ± 1.51 | 27.08 | < 0.001 | 20.70 ± 1.44 | 20.71 ± 1.51 | 0.010 | 0.919 | |
