Table 4. Univariable and multivariable analyses for length of hospital stay.
| Variable | Beta value [95% CI] | P value |
|---|---|---|
| Univariable analysis | ||
| Suction (yes vs. no) | −0.816 [−1.213, −0.418] | <0.001 |
| Age, years | 0.03 [0.013, 0.047] | 0.001 |
| Sex (female vs. male) | −0.367 [−0.823, 0.089] | 0.12 |
| BMI, kg/m2 | −0.024 [−0.098, 0.049] | 0.51 |
| Smoking status (current/ever vs. never) | 0.533 [−0.106, 1.172] | 0.10 |
| ASA (3 vs. 2) | 0.838 [0.134, 1.541] | 0.02 |
| Morbidity (yes vs. no) | 0.428 [0.006, 0.849] | 0.05 |
| FEV1% | −0.016 [−0.029, −0.004] | 0.01 |
| DLCO% | −0.007 [−0.022, 0.008] | 0.35 |
| Pleural adhesion (yes vs. no) | 0.012 [−0.469, 0.493] | 0.96 |
| Well-developed intralobular fissure (yes vs. no) | −0.534 [−2.638, 1.569] | 0.62 |
| Lymph (dissection vs. sampling) | −0.915 [−1.867, 0.037] | 0.06 |
| Number of lymph node | 0.091 [−0.047, 0.228] | 0.20 |
| Number of lymph node dissection stations | 0.053 [−0.082, 0.189] | 0.44 |
| Extent (seg vs. lob) | −0.271 [−0.69, 0.148] | 0.21 |
| Surgery duration, min | 0.007 [−0.002, 0.016] | 0.14 |
| Multivariable analysis | ||
| Suction (yes vs. no) | −0.605 [−1.02, −0.189] | 0.005 |
| Age, years | 0.028 [0.008, 0.048] | 0.006 |
| ASA (3 vs. 2) | 0.173 [−0.58, 0.926] | 0.65 |
| Morbidity (yes vs. no) | 0.101 [−0.359, 0.561] | 0.67 |
| FEV1% | −0.017 [−0.03, −0.005] | 0.006 |
CI, confidence interval; BMI, body mass index; ASA, the American Society of Anaesthesiologists; FEV1%, predicted forced expiratory volume in one second; DLCO%, predicted diffusion capacity of carbon oxide.