Table 5.

OR, 95% CI, and P value for independent risk factors in the multivariable logistic regression analysis of PNO-DVT.

Variable	OR	95%CI	P value
Age (> 70 years)	1.832	1.117–3.002	0.016
Duration of surgery (> 197 min)	3.733	1.955–7.219	0.000
Type of anesthesia (general)	1.558	1.064–2.281	0.023
Comorbidities (no.)
0			0.026
1–2	1.479	0.787–2.781	0.224
≥ 3	2.196	1.163–4.416	0.015

OR odds radio, CI confidence interval, CKMB creatine phosphokinase isoenzyme, BNP brain natriuretic peptide.