Table 1 Comparison of case-mix characteristics in the overall population and in patients younger than 75 years (younger group) and older than 75 years (elderly group) undergoing thoracoscopic ivor lewis esophagectomy before and after propensity score matching
Characteristics | All patients (n = 188) | Before matching | After matching | ||||
|---|---|---|---|---|---|---|---|
YG (n = 151) | EG (n = 37) | p | YG (n = 37) | EG (n = 37) | p | ||
Median age, years (IQR) | 65.5 (58–74) | 63 (56–69) | 78 (77–80.5) | < 0.0001 | 63 (55.5–68.5) | 78 (77–80.5) | < 0.0001 |
Sex, n (%) | 0.268 | 1 | |||||
Female | 43 (23) | 32 (21) | 11 (30) | 11 (30) | 11 (30) | ||
Male | 145 (77) | 119 (79) | 26 (70) | 26 (70) | 26 (70) | ||
Median BMI, kg/m2 (IQR) | 26 (23.1–29) | 26 (23–29) | 26 (24–29) | 0.736 | 26 (22–28.85) | 26 (24–29) | 0.565 |
Diabetes, n (%) | 30 (16) | 22 (15) | 8 (22) | 0.294 | 5 (14) | 8 (22) | 0.359 |
Cardiovascular disease, n (%) | 119 (63) | 90 (60) | 29 (78) | 0.034 | 27 (73) | 29 (78) | 0.588 |
Pulmonary disease, n (%) | 38 (20) | 31 (21) | 7 (19) | 0.827 | 8 (22) | 7 (19) | 0.772 |
Renal insufficiency, n (%) | 17 (9) | 10 (7) | 7 (19) | 0.048 | 7 (19) | 7 (19) | 1 |
Liver cirrhosis, n (%) | 0 (0) | 1 (3) | 1 | ||||
ASA physical status, n (%) | 0.528 | 0.561 | |||||
ASA I | 5 (3) | 5 (3) | 0 (0) | 1 (3) | 0 (0) | ||
ASA II | 67 (37) | 55 (39) | 12 (32) | 14 (39) | 12 (32) | ||
ASA III | 105 (58) | 81 (57) | 24 (65) | 19 (53) | 24 (65) | ||
ASA IV | 3 (2) | 2 (1) | 1 (3) | 2 (5) | 1 (3) | ||
Tumor location, n (%) | 0.182 | 0.159 | |||||
Esophagus | 103 (55) | 79 (53) | 24 (65) | 18 (49) | 24 (65) | ||
Gastroesophageal junction | 84 (45) | 71 (47) | 13 (35) | 19 (51) | 13 (35) | ||
Preoperative chemotherapy, n (%) | 165 (88) | 138 (91) | 27 (73) | 0.005 | 29 (78) | 27 (73) | 0.588 |
Preoperative radiotherapy, n (%) | 68 (36) | 59 (39) | 9 (24) | 0.089 | 9 (24) | 9 (24) | 1 |
T category, n (%) | 0.929 | 0.487 | |||||
T1 | 12 (7) | 10 (7) | 2 (5) | 6 (17) | 2 (5) | ||
T2 | 21 (12) | 17 (12) | 4 (11) | 4 (11) | 4 (11) | ||
T3 | 136 (76) | 108 (76) | 28 (76) | 25 (69) | 28 (76) | ||
T4 | 10 (6) | 7 (5) | 3 (8) | 1 (3) | 3 (8) | ||
N category, n (%) | 0.381 | 0.829 | |||||
N0 | 56 (31) | 47 (33) | 9 (24) | 11 (31) | 9 (24) | ||
N1 | 54 (30) | 41 (29) | 13 (35) | 11 (31) | 13 (35) | ||
N2 | 45 (25) | 33 (23) | 12 (32) | 9 (26) | 12 (32) | ||
N3 | 24 (13) | 21 (15) | 3 (8) | 4 (12) | 3 (8) | ||
Histologic type, n (%) | 0.618 | 0.634 | |||||
Adenocarcinoma | 126 (70) | 99 (69) | 27 (73) | 29 (78) | 27 (73) | ||
Squamous cell carcinoma | 55 (30) | 45 (31) | 10 (27) | 8 (22) | 10 (27) | ||
UICC stage, n (%) | 0.712 | 0.229 | |||||
I | 17 (10) | 15 (11) | 2 (5) | 5 (14) | 2 (5) | ||
II | 42 (24) | 33 (23) | 9 (24) | 8 (23) | 9 (24) | ||
III | 109 (61) | 86 (61) | 23 (62) | 22 (63) | 23 (62) | ||
IV | 10 (6) | 7 (5) | 3 (8) | 0 (0) | 3 (8) | ||