Table 1 Patients’ characteristics before and after propensity score matching
Variables | Before matching | After matching | ||||
|---|---|---|---|---|---|---|
RAMIE (n = 27) | VAMIE (n = 88) | P value | RAMIE (n = 27) | VAMIE (n = 27) | P value | |
Gender | 0.636 | 1.000 | ||||
Male | 20 (74.1) | 61 (69.3) | 20 (74.1) | 20 (74.1) | ||
Female | 7 (25.9) | 27 (30.7) | 7 (25.9) | 7 (25.9) | ||
Age | 61.0 ± 8.0 | 62.9 ± 8.3 | 0.310 | 61.0 ± 8.0 | 61.6 ± 9.8 | 0.621* |
BMI (kg/m2) | 21.5 ± 2.7 | 21.4 ± 2.7 | 0.935 | 21.5 ± 2.7 | 21.9 ± 2.8 | 0.578 |
FEV1% predicted | 94.5 ± 13.8 | 84.2 ± 19.6 | 0.012 | 94.6 ± 13.8 | 92.9 ± 23.0 | 0.747 |
Charlson comorbidity index | 0.198 | 0.506 | ||||
1 | 1 (3.7) | 6 (6.8) | 1 (3.7) | 4 (14.8) | ||
2 | 10 (37.0) | 20 (22.7) | 10 (37.0) | 8 (29.6) | ||
3 | 13 (48.1) | 37 (42.0) | 13 (48.1) | 11 (40.7) | ||
4 | 3 (11.1) | 25 (28.4) | 3 (11.1) | 4 (14.8) | ||
Tumor location | 0.457 | 0.514 | ||||
Proximal | 1 (3.7) | 8 (9.1) | 1 (3.7) | 3 (11.1) | ||
Middle | 18 (66.6) | 48 (54.5) | 18 (66.6) | 15 (55.6) | ||
Distal/EGJ | 8 (29.6) | 32 (36.4) | 8 (29.6) | 9 (33.3) | ||
Histological type | 0.395 | 0.334† | ||||
Squamous cell carcinoma | 23 (85.2) | 80 (90.9) | 23 (85.2) | 25 (92.6) | ||
other | 4 (14.8) | 8 (9.1) | 4 (14.8) | 2 (7.4) | ||
Pathologic T stage | 0.042 | 0.334 | ||||
T1 | 4 (14.8) | 13 (14.8) | 4 (14.8) | 1 (3.7) | ||
T2 | 13 (48.1) | 21 (23.9) | 13 (48.1) | 13 (48.1) | ||
T3 | 10 (37.0) | 54 (61.4) | 10 (37.0) | 13 (48.1) | ||
Pathologic N stage | 0.260 | 0.387 | ||||
N0 | 13 (48.1) | 58 (65.9) | 13 (48.1) | 18 (66.6) | ||
N1 | 10 (37.0) | 17 (19.3) | 10 (37.0) | 8 (29.6) | ||
N2 | 3 (11.1) | 11 (12.5) | 3 (11.1) | 1 (3.7) | ||
N3 | 1 (3.7) | 2 (2.3) | 1 (3.7) | 0 | ||
Tumor grade | 0.399 | 0.285 | ||||
Well differentiated | 2 (7.4) | 13 (14.8) | 2 (7.4) | 6 (22.2) | ||
Moderate differentiated | 19 (70.4) | 63 (71.6) | 19 (70.4) | 17 (63.0) | ||
Poorly differentiated | 6 (22.2) | 12 (13.6) | 6 (22.2) | 4 (14.8) | ||