Table 2 Baseline characteristics before and after PSM
Characteristics | Before PSM | After PSM | ||||
|---|---|---|---|---|---|---|
SSES (162) | SNS (95) | P value | SSES (95) | SNS (95) | P value | |
Age, year | 62.0 ± 10.3 | 60.3 ± 11.5 | 0.225 | 61.8 ± 10.2 | 60.3 ± 11.5 | 0.322 |
Sex | 0.639 | 0.759 | ||||
Male | 101 (62.3%) | 62 (65.3%) | 64 (67.4%) | 62 (65.3%) | ||
Female | 61 (37.7%) | 33 (34.7%) | 31 (32.6%) | 33 (34.7%) | ||
BMI, kg/m2 | 22.9 ± 2.9 | 22.9 ± 3.1 | 0.915 | 23.1 ± 2.8 | 22.9 ± 3.1 | 0.708 |
Smoking | 70 (43.2%) | 40 (42.1%) | 0.863 | 44 (46.3%) | 40 (42.1%) | 0.559 |
Drinking | 55 (34.0%) | 33 (34.7%) | 0.898 | 37 (38.9%) | 33 (34.7%) | 0.547 |
Hypertension | 39 (24.1%) | 25 (26.3%) | 0.688 | 23 (24.2%) | 25 (26.3%) | 0.738 |
T2DM | 15 (9.3%) | 10 (10.5%) | 0.741 | 9 (9.5%) | 10 (10.5%) | 0.809 |
CHD | 6 (3.7%) | 1 (1.1%) | 0.265 | 1 (1.1%) | 1 (1.1%) | 1.000 |
Pre-operative hemoglobin, g/L | 125.7 ± 19.4 | 128.4 ± 20.4 | 0.302 | 128.0 ± 19.6 | 128.4 ± 20.4 | 0.908 |
Pre-operative albumin, g/L | 40.3 ± 4.9 | 41.6 ± 4.7 | 0.041* | 40.5 ± 4.8 | 41.6 ± 4.7 | 0.099 |
Neoadjuvant chemoradiation | 48 (29.6%) | 25 (26.3%) | 0.668 | 28 (29.5%) | 25 (26.3%) | 0.627 |
TNM stage | 0.100 | 0.053 | ||||
I | 55 (34.0%) | 39 (41.0%) | 33 (34.7%) | 39 (41.0%) | ||
II | 54 (33.3%) | 20 (21.1%) | 35 (36.8%) | 20 (21.1%) | ||
III | 50 (30.9%) | 31 (32.6%) | 26 (27.4%) | 31 (32.6%) | ||
IV | 3 (1.8%) | 5 (5.3%) | 1 (1.1%) | 5 (5.3%) | ||