Table 1 Comparison of general data between two patient groups
Variables | Overall (n = 322) | Non-atelectasis group (n = 263) | Atelectasis group (n = 59) | P value |
|---|---|---|---|---|
Age, n (%) | 0.001 | |||
< 70 years | 159 (49.4) | 141 (53.6) | 18 (30.5) | |
≥ 70 years | 163 (50.6) | 122 (46.4) | 41 (69.5) | |
Gender, n (%) | 0.192 | |||
Male | 172 (53.4) | 145 (55.1) | 27 (45.8) | |
Female | 150 (46.6) | 118 (44.9) | 32 (54.2) | |
BMI, n (%) | 0.900 | |||
< 25 kg/m2 | 253 (78.6) | 207 (78.7) | 46 (78.0) | |
≥ 25 kg/m2 | 69 (21.4) | 56 (21.3) | 13 (22.0) | |
Smoking, n (%) | < 0.001 | |||
No | 198 (61.5) | 181 (68.8) | 17 (28.8) | |
Yes | 124 (38.5) | 82 (31.2) | 42 (71.2) | |
Diabetes, n (%) | 0.754 | |||
No | 277 (86.0) | 227 (86.3) | 50 (84.7) | |
Yes | 45 (14.0) | 36 (13.7) | 9 (15.3) | |
Hypertension, n (%) | 0.500 | |||
No | 214 (66.5) | 177 (67.3) | 37 (62.7) | |
Yes | 108 (33.5) | 86 (32.7) | 22 (37.3) | |
Cardiovascular disease, n (%) | 0.385 | |||
No | 254 (78.9) | 205 (77.9) | 49 (83.1) | |
Yes | 68 (21.1) | 58 (22.1) | 10 (16.9) | |
Preoperative FEV1 (%) | 86.0 ± 8.8 | 87.2 ± 7.7 | 80.8 ± 11.5 | < 0.001 |
Tumor type, n (%) | 0.862 | |||
Adenocarcinoma | 209 (64.9) | 171 (65.0) | 38 (64.4) | |
Squamous cell carcinoma | 90 (28.0) | 74 (28.1) | 16 (27.1) | |
Large cell carcinoma | 23 (7.1) | 18 (6.8) | 5 (8.5) | |
Tumor stage, n (%) | 0.930 | |||
Stage I | 247 (76.7) | 202 (76.8) | 45 (76.3) | |
Stage II | 75 (23.3) | 61 (23.2) | 14 (23.7) | |
Tumor location, n (%) | ||||
Left lung | 132 (41.0) | 108 (41.1) | 24 (40.7) | 0.956 |
Right lung | 190 (59.0) | 155 (58.9) | 35 (59.3) | |
Preoperative albumin level, n (%) | 0.282 | |||
< 40 g/L | 281 (87.3) | 232 (88.2) | 49 (83.1) | |
≥ 40 g/L | 41 (12.7) | 31 (11.8) | 10 (16.9) | |
Surgery duration, n (%) | < 0.001 | |||
< 3 h | 240 (74.5) | 211 (80.2) | 29 (49.2) | |
≥ 3 h | 82 (25.5) | 52 (19.8) | 30 (50.8) | |
Resection scope, n (%) | < 0.001 | |||
Sublobar resection | 223 (69.3) | 195 (74.1) | 28 (47.5) | |
Lobectomy | 99 (30.7) | 68 (25.9) | 31 (52.5) | |
Postoperative mechanical ventilation, n (%) | 0.009 | |||
Not required | 307 (95.3) | 255 (97) | 52 (88.1) | |
Required | 15 (4.7) | 8 (3) | 7 (11.9) | |
Length of hospital stay, Mean ± SD (days) | 8.8 ± 1.4 | 8.6 ± 1.1 | 9.8 ± 2.0 | < 0.001 |
30-day perioperative mortality, n (%) | 0.155 | |||
No | 318 (98.8) | 261 (99.2) | 57 (96.6) | |
Yes | 4 (1.2) | 2 (0.8) | 2 (3.4) |