The necessity of abdominal drainage for patients with complicated appendicitis undergoing laparoscopic appendectomy: a retrospective cohort study

Table 3 Multivariate logistic regression analysis for complications

	All complications (Clavien–Dindo classification)		Wound infection		Intra-abdominal abscess		Ileus
	OR (95% CI)	P value	OR (95% CI)	P value	OR (95% CI)	P value	OR (95% CI)	P value
Drainage		< 0.0001		0.0309		0.4193		0.0004
No	1.0		1.0		1.0		1.0
Yes	2.439 (1.597–3.726)		1.692 (1.049–2.729)		1.655 (0.487–5.616)		3.726 (1.788–7.764)
Sex		0.1465		0.1383		0.1648		0.0755
Female	1.0		1.0		1.0		1.0
Male	1.351 (0.900–2.029)		1.370 (0.903–2.079)		2.555 (0.680–9.598)		1.887 (0.937–3.800)
Age, yrs	1.020 (1.010–1.031)	0.0002	1.005 (0.994–1.016)	0.3389	1.015 (0.985–1.045)	0.3301	1.026 (1.009–1.044)	0.0033
AAST grade	1.673 (1.469–1.905)	< 0.0001	1.110 (0.962–1.281)	0.1547	2.219 (1.397–3.523)	0.0007	1.693 (1.343–2.135)	< 0.0001

OR, odd ratio; CI, confidence interval; AAST, The American Association for the Surgery of Trauma

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