Table 1 Clinical characteristics of patients in the two groups before and after PSM
Variables | Group (before PSM) | Group (after PSM) | ||||
|---|---|---|---|---|---|---|
A (n = 124) | B (n = 109) | P value | A (n = 82) | B (n = 82) | P value | |
Performance status (0:1:2) | 119:5:0 | 105:4:0 | 0.580 | 78:4:0 | 80:2:0 | 0.682 |
Gender (female/male) | 50:74 | 58:51 | 0.033 | 37:45 | 39:43 | 0.754 |
Age (years), n (%) | ||||||
< 45 | 10 (8.1) | 2 (1.8) | 0.037 | 8 (9.8) | 1 (1.2) | 0.696 |
45–55 | 38 (30.6) | 28 (25.7) | 23 (28.0) | 27 (32.9) | ||
56–65 | 50 (40.3) | 61 (56.0) | 34 (41.5) | 43 (52.4) | ||
> 65 | 26 (21.0) | 18 (16.5) | 17 (20.7) | 11 (13.4) | ||
ASA, n (%) | ||||||
I | 120 (96.8) | 105 (96.3) | 0.566 | 78 (95.1) | 82 (97.6) | 0.405 |
II | 4 (3.2) | 4 (3.7) | 4 (4.9) | 2 (2.4) | ||
III | 0 | 0 | 0 | 0 | ||
IV.V | 0 | 0 | 0 | 0 | ||
BMI (kg/m2), n (%) | ||||||
< 24 | 90 (54.2) | 76 (45.8) | 0.037 | 64 (78.0) | 60 (73.2) | 0.502 |
24–28 | 33 (60.0) | 22 (40.0) | 17 (20.7) | 21 (25.6) | ||
> 28 | 11 (91.7) | 1 (8.3) | 1 (1.2) | 1 (1.2) | ||
Previous laparotomy, n (%) | 5 (4.0) | 14 (12.8) | 0.014 | 5 (6.1) | 7 (8.5) | 0.549 |
Jaundice, n (%) | 50 (40.3) | 66 (60.6) | 0.002 | 47 (57.3) | 44 (53.7) | 0.637 |
Cholangitis, n (%) | 33 (26.6) | 44 (40.4) | 0.026 | 29 (35.4) | 30 (36.6) | 0.871 |
Weight loss, n (%) | 38 (44.2) | 48 (55.8) | 0.035 | 29 (35.4) | 28 (34.1) | 0.870 |
Tumor size, n (%) | ||||||
< 2 cm | 44 (35.5) | 29 (26.6) | 0.026 | 25 (30.5) | 22 (26.8) | 0.869 |
2–4 cm | 56 (45.2) | 68 (62.4) | 47 (57.3) | 49 (59.8) | ||
> 4 cm | 24 (19.4) | 12 (11.0) | 10 (12.2) | 11 (13.4) | ||
HB (g/L), n (%) | ||||||
≧ 10 | 111 (89.5) | 91 (83.5) | 0.176 | 74 (90.2) | 71 (86.6) | 0.464 |
< 10 | 13 (10.5) | 18 (16.5) | 8 (9.8) | 11 (13.4) | ||
ALB (g/L), n (%) | ||||||
≧ 35 | 90 (72.6) | 63 (57.8) | 0.018 | 54 (65.9) | 51 (62.2) | 0.625 |
< 35 | 34 (27.4) | 46 (42.2) | 28 (34.1) | 31 (37.8) | ||
Preoperative bile duct drainage, n (%) | 30 (24.2) | 40 (36.7) | 0.038 | 27 (32.9) | 26 (31.7) | 0.867 |
Comorbidities, n (%) | ||||||
Diabetes | 18 (14.5) | 28 (25.7) | 0.033 | 13 (15.9) | 16 (19.5) | 0.539 |
Respiratory disease | 11 (8.9) | 12 (11.0) | 0.585 | 6 (7.3) | 6 (7.3) | > 0.999 |
Ischemic heart disease | 10 (8.1) | 8 (7.3) | 0.836 | 7 (8.5) | 6 (7.3) | 0.773 |
Hypertension | 40 (32.3) | 30 (27.5) | 0.431 | 22 (26.8) | 23 (28.0) | 0.861 |
Pancreatic duct diameter, n (%) | ||||||
< 3 mm | 19 (15.3) | 30 (27.5) | 0.023 | 14 (17.1) | 16 (19.5) | 0.686 |
≧ 3 mm | 105 (84.7) | 79 (72.5) | 68 (82.9) | 66 (80.5) | ||
Pancreas texture, n (%) | ||||||
Soft | 37 (29.8) | 35 (32.1) | 0.708 | 22 (26.8) | 23 (28.0) | 0.861 |
Firm | 87 (70.2) | 74 (67.9) | 60 (73.2) | 59 (72.0) | ||