Factors and outcomes leading to postoperative emergency department visits after ureteroneocystostomy

Table 2 Patient demographics and comorbidities for patients with an emergency department visit following ureteroneocystostomy (cont.), n (%)

	Total cohort (n = 1495)	Postoperative ED visit (n = 164)	No postoperative ED visit (n = 1331)	P value1
Premature birth
25-30 weeks	15 (1.0)	1 (0.6)	14 (1.1)	1.000
31-34 weeks	39 (2.6)	6 (3.7)	33 (2.5)	0.4303
35-36 weeks	70 (4.7)	18 (11.0)	52 (3.9)	0.0003
Cardiac risk factors
Minor	46 (3.1)	10 (6.1)	36 (2.7)	0.0176
Major	44 (2.9)	5 (3.0)	39 (2.9)	0.9324
Severe	3 (0.2)	0 (0.0)	3 (0.2)	P = 0.5429
VUR disease severity
VUR Grade 1	40 (2.7)	7 (4.3)	33 (2.5)	0.1805
VUR Grade 2/3	446 (29.8)	50 (30.5)	396 (29.8)	0.8460
VUR Grade 4/5	887 (59.3)	95 (57.9)	792 (59.5)	0.6981
ASA classification
ASA Class 1	250 (16.7)	19 (11.6)	231 (17.4)	0.0618
ASA Class 2	1060 (70.9)	119 (72.6)	941 (70.7)	0.6204
ASA Class 3	177 (11.8)	25 (15.2)	152 (11.4)	0.1528
ASA Class 4	6 (0.4)	1 (0.6)	5 (0.4)	0.6547

¹The P value represents tests for significant variation from χ² analysis of categorical variables, t-test for continuous factors with equal variance.

VUR: Vesicoureteral reflux; ASA: American society of anesthesiology; VUR: Grade determined using standardized voiding cystourethrogram; ED: Emergency department.