Table 4.

Multivariate analysis of postoperative complications

Characteristic	B	SE	Waid	P	Exp(B)	95% CI
sex(1)	1.248	0.469	7.087	0.008	3.483	(1.39–8.73)
smoking status (1)	0.4	0.384	1.082	0.298	1.491	(0.702–3.167)
chronic alcohol consumption (1)	-0.01	0.367	0.001	0.975	0.989	(0.481–2.032)
hypertension (1)	0.337	0.327	1.061	0.303	1.401	(0.737–2.661)
FEV1	-1.06	0.348	9.238	0.002	0.348	(0.176–0.687)
FEV1 Pre / Ref	0.01	0.01	0.915	0.339	1.01	(0.99–1.03)
tumor diameter	0.044	0.137	0.105	0.746	1.045	(0.799–1.368)
tumor composition (1)	-0.16	0.333	0.227	0.634	0.853	(0.444–1.64)
operation time	0.007	0.004	2.829	0.093	1.007	(0.999–1.105)
number of lymph nodes dissected	0.02	0.035	0.324	0.569	1.02	(0.953–1.092)
tumor type (1)	-0.01	0.413	0	0.984	0.992	(0.441–2.229)
T(1)	0.208	0.366	0.324	0.569	1.231	(0.601–2.522)
N(1)	0.249	0.49	0.258	0.611	1.283	(0.491–3.355)
clinical staging (1)	0.389	0.495	0.615	0.433	1.475	(0.559–3.894)
constant	-1.91	0.972	3.86	0.049	0.148

a Variables included in step 1 were sex, smoking status, alcohol consumption, hypertension presence, FEV1 measurement, the ratio of FEV1, tumor diameter, tumor composition, duration of operation, number of lymph nodes involved, tumor type, T stage, N stage, and clinical staging