Incidence, Patient-Related Risk Factors, and Outcomes of Postoperative Pneumonia after Cholecystectomy: A Population-Based Cohort Study
Table 2
1 : 4 case-control match of the risk factors based on age and sex.
Variable
Non-postop pneumonia ()
Postop pneumonia ()
value
Age
0.4687
Mean (SD)
65.68 (15.39)
65.84 (15.53)
Sex
1.0000
Female
11608 (47.92%)
2902 (47.92%)
Male
12616 (52.08%)
3154 (52.08%)
Surgical type
<0.0001
OC
10025 (41.38%)
2593 (42.82%)
LC
14199 (58.62%)
3463 (57.18%)
Preoperative clinical parameter
Hypertension
6940 (28.65%)
1804 (29.79%)
0.4557
DM
4526 (18.68%)
1587 (26.21%)
<0.0001
CAD
3021 (12.47%)
1085 (17.92%)
<0.0001
CVA
2258 (9.32%)
913 (15.08%)
<0.0001
COPD
1724 (7.12%)
1501 (24.79%)
<0.0001
Hemodialysis
711 (2.94%)
258 (4.26%)
<0.0001
Liver cirrhosis
361 (1.49%)
195 (3.22%)
<0.0001
Obesity
167 (0.69%)
44 (0.73%)
0.7559
CHF
241 (0.99%)
125 (2.06%)
<0.0001
A -test or chi-square test was used to examine the differences in the demographic characteristics of the 1 : 4 case-control match among cholecystectomy patients based on age and sex. OC: open cholecystectomy; LC: laparoscopic cholecystectomy; DM: diabetes mellitus; CAD: coronary artery disease; CVA: cerebrovascular disease; COPD: chronic obstructive pulmonary disease; CHF: congestive heart failure.
