Table 2.
Short-term outcomes before and after PSM
| Characteristics | Before PSM | After PSM | ||||
|---|---|---|---|---|---|---|
| Very Elderly (331) | Elderly (1753) | P value | Very Elderly (331) | Elderly (331) | P value | |
| Operation time (min) | 215.2 ± 69.2 | 222.7 ± 82.1 | 0.118 | 215.2 ± 69.2 | 211.4 ± 75.8 | 0.507 |
| Blood loss (mL) | 108.9 ± 131.2 | 102.1 ± 134.7 | 0.399 | 108.9 ± 131.2 | 101.3 ± 148.9 | 0.484 |
| Retrieved lymph nodes | 14.3 ± 8.4 | 14.3 ± 7.0 | 0.935 | 14.3 ± 8.4 | 14.8 ± 6.9 | 0.415 |
| Hospital stay (day) | 13.4 ± 10.9 | 11.9 ± 10.6 | 0.015* | 13.4 ± 10.9 | 11.5 ± 6.7 | 0.007** |
| Overall complications | 118 (35.6%) | 438 (25.0%) | < 0.01** | 118 (35.6%) | 97 (29.3%) | 0.081 |
| Major complications | 15 (4.5%) | 51 (2.9%) | 0.122 | 15 (4.5%) | 11 (3.3%) | 0.424 |
T2DM, type 2 diabetes mellitus; PSM, propensity score matching
Variables are expressed as the mean ± SD, n (%), *P-value < 0.05, ** P-value < 0.01