Pulmonary complications in patients with chronic obstructive pulmonary disease following transthoracic esophagectomy

Table 1 Baseline characteristics of study population with or without COPD undergoing transthoracic esophagectomy

Characteristics	COPD(n = 86, %)	Non-COPD(n = 272, %)	P value
Age, yr	61.3 ± 5.5	63.2 ± 7.1	0.522
Sex (male:female)	63/23	191/81	0.638
Smoking history	79 (91.9)	214 (78.7)	< 0.01
Past medical history
Hypertension	16 (18.6)	48 (17.6)	0.840
Cardiac disease	13 (15.1)	35 (12.9)	0.594
Diabetes	10 (11.6)	33 (12.1)	0.900
Cancer stage
I	17 (19.8)	56 (20.6)	0.869
II	48 (55.8)	145 (53.3)	0.685
III	21 ( 24.4)	71 (26.1)	0.115
IV	0	0	-
Site of anastomosis
Neck	32 (37.2)	108 (39.7)	0.679
Chest	54 (62.8)	164 (60.3)	0.679
Duration of operation (min)	162.75 ± 51.05	185.15 ± 66.24	0.239
Blood loss (mL)	365.50 ± 219.36	434.00 ± 232.48	0.344
Low serum albumin (< 35g/L)	25 (29.1)	89 (32.7)	0.526
Spirometry
FEV1 (L)	1.6 ± 0.3	2.3 ± 0.5	< 0.01
FEV1,% predicted	51.5 ± 10.5	80.4 ± 13.1	< 0.01
FEV1/FVC,%	57.6 ± 8.9	73.3 ± 6.8	< 0.01
DLCO,% predicted	83.7 ± 13.4	85.0 ± 13.9	0.774

FEV1 = forced expiratory volume in 1 s; FVC = forced vital capacity; DLCO = diffusion capacity of the lung for carbon monoxide.