Table 2 General characteristics and univariate analysis of risk factors for atelectasis in the training set
Variables | Overall (n = 226) | Non-atelectasis group (n = 179) | Atelectasis group (n = 47) | OR (95%CI) | P value |
|---|---|---|---|---|---|
Age,n(%) | |||||
< 70 years | 110 (48.7) | 94 (52.5) | 16 (34.0) | Reference | |
≥ 70 years | 116 (51.3) | 85 (47.5) | 31 (66.0) | 2.143 (1.095,4.191) | 0.026 |
Gender, n (%) | |||||
Male | 120 (53.1) | 99 (55.3) | 21 (44.7) | Reference | |
Female | 106 (46.9) | 80 (44.7) | 26 (55.3) | 1.532 (0.803,2.924) | 0.196 |
BMI, n (%) | |||||
< 25 kg/m2 | 176 (77.9) | 136 (76.0) | 40 (85.1) | Reference | |
≥ 25 kg/m2 | 50 (22.1) | 43 (24.0) | 7 (14.9) | 0.553 (0.231,1.325) | 0.184 |
Smoking, n (%) | |||||
No | 136 (60.2) | 120 (67.0) | 16 (34.0) | Reference | |
Yes | 90 (39.8) | 59 (33.0) | 31 (66.0) | 3.941 (1.998,7.771) | < 0.001 |
Diabetes, n (%) | |||||
No | 198 (87.6) | 159 (88.8) | 39 (83.0) | Reference | |
Yes | 28 (12.4) | 20 (11.2) | 8 (17.0) | 1.631 (0.669,3.977) | 0.282 |
Hypertension, n (%) | |||||
No | 150 (66.4) | 120 (67.0) | 30 (63.8) | Reference | |
Yes | 76 (33.6) | 59 (33.0) | 17 (36.2) | 1.153 (0.589,2.256) | 0.679 |
Cardiovascular disease, n (%) | |||||
No | 176 (77.9) | 138 (77.1) | 38 (80.9) | Reference | |
Yes | 50 (22.1) | 41 (22.9) | 9 (19.1) | 0.797 (0.356,1.785) | 0.581 |
Preoperative FEV1 (%) | 86.1 ± 9.3 | 87.3 ± 8.0 | 81.2 ± 12.0 | 0.938 (0.907,0.970) | < 0.001 |
Tumor type, n (%) | |||||
Adenocarcinoma | 139 (61.5) | 107 (59.8) | 32 (68.1) | Reference | |
Squamous cell carcinoma | 68 (30.1) | 57 (31.8) | 11 (23.4) | 0.645 (0.303,1.375) | 0.257 |
Large cell carcinoma | 19 (8.4) | 15 (8.4) | 4 (8.5) | 0.892 (0.276,2.877) | 0.848 |
Tumor stage, n (%) | |||||
Stage I | 167 (73.9) | 132 (73.7) | 35 (74.5) | Reference | |
Stage II | 59 (26.1) | 47 (26.3) | 12 (25.5) | 0.963 (0.462,2.009) | 0.920 |
Tumor location, n (%) | |||||
Left lung | 93 (41.2) | 75 (41.9) | 18 (38.3) | Reference | |
Right lung | 133 (58.8) | 104 (58.1) | 29 (61.7) | 1.162 (0.601,2.245) | 0.655 |
Preoperative albumin level, n (%) | |||||
< 40 g/L | 196 (86.7) | 158 (88.3) | 38 (80.9) | Reference | |
≥ 40 g/L | 30 (13.3) | 21 (11.7) | 9 (19.1) | 1.782 (0.756,4.200) | 0.187 |
Surgery duration, n (%) | |||||
< 3 h | 171 (75.7) | 146 (81.6) | 25 (53.2) | Reference | |
≥ 3 h | 55 (24.3) | 33 (18.4) | 22 (46.8) | 3.893 (1.960,7.734) | < 0.001 |
Resection scope, n (%) | |||||
Sublobar resection | 157 (69.5) | 135 (75.4) | 22 (46.8) | Reference | |
Lobectomy | 69 (30.5) | 44 (24.6) | 25 (53.2) | 3.487 (1.791,6.789) | < 0.001 |