Characteristics | Before PSM | After PSM | ||||
---|---|---|---|---|---|---|
Younger (403) | Older (4196) | P value | Younger (401) | Older (401) | P value | |
Age (year) | 39.4 ± 5.4 | 65.1 ± 10.0 | <0.001* | 39.5 ± 5.4 | 63.2 ± 9.8 | <0.001* |
Sex | Â | Â | 0.379 | Â | Â | 0.567 |
  Male | 229 (56.8%) | 2479 (59.1%) |  | 228 (56.9%) | 236 (58.9%) |  |
  Female | 174 (43.2%) | 1717 (40.9%) |  | 173 (43.1%) | 165 (41.1%) |  |
BMI (kg/m2) | 22.8 ± 3.4 | 22.7 ± 3.2 | 0.323 | 22.8 ± 3.3 | 22.6 ± 3.2 | 0.325 |
Smoking | 144 (35.7%) | 1611 (38.4%) | 0.293 | 143 (35.7%) | 149 (37.2%) | 0.660 |
Drinking | 113 (28.0%) | 1310 (31.2%) | 0.187 | 112 (27.9%) | 113 (28.2%) | 0.937 |
Hypertension | 22 (5.5%) | 1169 (21.8%) | <0.001* | 22 (5.5%) | 24 (6.0%) | 0.761 |
T2DM | 7 (1.7%) | 567 (13.5%) | <0.001* | 7 (1.7%) | 3 (0.7%) | 0.203 |
CHD | 1 (0.2%) | 189 (4.5%) | <0.001* | 1 (0.2%) | 2 (0.5%) | 1.000 |
Tumor location | Â | Â | 0.235 | Â | Â | 0.724 |
  Colon | 201 (49.9%) | 1963 (46.8%) |  | 199 (49.6%) | 194 (48.4%) |  |
  Rectum | 202 (50.1%) | 2233 (53.2%) |  | 202 (50.4%) | 207 (51.6%) |  |
Tumor stage | Â | Â | 0.988 | Â | Â | 0.947 |
  I | 75 (18.6%) | 790 (18.8%) |  | 75 (18.7%) | 72 (18.0%) |  |
  II | 165 (40.9%) | 1736 (41.4%) |  | 165 (41.1%) | 171 (42.6%) |  |
  III | 146 (36.3%) | 1485 (35.4%) |  | 144 (35.9%) | 139 (34.7%) |  |
  IV | 17 (4.2%) | 185 (4.4%) |  | 17 (4.3%) | 19 (4.7%) |  |