Incidence and Risk Factors of Postoperative Pulmonary Complications in Noncardiac Chinese Patients: A Multicenter Observational Study in University Hospitals
Table 2
Demographic and clinical characteristics.
Overall
Cohort 1
Cohort 2
(n = 1673)
(n = 902)
(n = 771)
Male, n (%)
770 (46.0)
436 (48.3)
334 (43.3)
0.04
Age, yr
49 (37–60)
48 (36–60)
49 (39–60)
0.69
Education, yr
9 (6–9)
9 (6–9)
9 (9–14.5)
0.31
Smoking status, n (%)
0.85
Never smoker
1397 (83.5)
753 (83.5)
644 (83.5)
Former smoker
222 (13.3)
118 (13.1)
104 (13.5)
Current smoker
54 (3.2)
31 (3.4)
23 (3.0)
Drinker, n (%)
0.47
Never drinker
1487 (88.9)
804 (89.1)
683 (88.6)
Former drinker
152 (9.1)
83 (9.2)
69 (8.9)
Current drinker
34 (2.0)
15 (1.7)
19 (2.5)
Body mass index, kg/m2
22.3 (20.3–24.3)
22.1 (20.3–24. 2)
22.4 (20.3–24.3)
0.85
Preoperative SpO2, %
98 (98-99)
98 (98-99)
98 (98-98)
0.45
Respiratory infection in the last month, n (%)
28 (1.7)
16 (1.8)
12 (1.6)
0.85
ASA physical status, n (%)
0.43
1
830 (49.6)
464 (51.4)
366 (47.5)
2
722 (43.2)
380 (42.1)
342 (44.4)
3
114 (6.8)
54 (6.0)
60 (7.8)
4
5 (0.3)
3 (0.3)
2 (0.3)
5
2 (0.1)
1 (0.1)
1 (0.1)
Emergency surgery, n (%)
102 (6.1)
55 (6.1)
47 (6.1)
0.99
Anesthesia, n (%)
0.24
General and combined#
1251 (74.8)
664 (73.6)
587 (76.1)
Neuraxial/regional
422 (25.2)
238 (26.4)
184 (23.9)
Surgical site, n (%)
<0.001
Peripheral
1015 (60.7)
620 (68.7)
395 (51.2)
Abdominal
600 (35.9)
243 (26.9)
357 (46.3)
Intrathoracic
58 (3.5)
39 (4.3)
19 (2.5)
Duration of surgery, h
0.63
≤2 h
1238 (74.0)
659 (73.1)
579 (75.1)
2-3 h
235 (14.0)
132 (14.6)
103 (13.4)
>3 h
200 (12.0)
111 (12.3)
89 (11.5)
LOS, d
8 (5–14)
9 (6–14)
8 (5–13)
0.01
Data are median (quartile) unless otherwise specified. SpO2: saturation of peripheral oxygen; ASA: American society of anesthesiologists; LOS: length of stay. *Cohort 1 versus cohort 2; #this category included general anesthesia alone and general anesthesia combined with regional blockade.
