Table 4.

Multivariate regression analysis for risks of postoperative infection

	OR (95% CI)	p
Hospital (level of care)	1.57 (0.97–2.54)	0.069
Pandemic period	0.84 (0.53–1.34)	0.469
ASA score
II	1.03 (0.49–5.62)	0.418
III	3.72 (1.08–12.84)	0.037
IV	14.81 (2.70–81.11)	0.002
Presence of medical devices	2.17 (1.37–3.43)	0.001

ASA: American Society of Anesthesiologists; CI: confidence interval; OR: odds ratio.