Table 2.

The characteristics of surgical patients

Parameter	Overall (8–18), n=5427	Groups 8–13, n=2802	Groups 13–18, n=2625	P
Rehabilitation time (day), mean±s.d.
Bladder irrigation	2.2±1.3	2.3±1.3	2.2±1.3	0.004
Catheterization	3.7±1.7	4.0±1.7	3.3±1.6	<0.001
Postoperative hospitalization	4.7±2.2	5.1±2.4	4.2±1.8	<0.001
Hospitalization	9.0±4.2	9.7±4.4	8.4±3.8	<0.001
Intraoperative complications, n (%)
Blood transfusion	8 (0.2)	4 (0.1)	4 (0.2)	NA
Unplanned second surgery	12 (0.2)	9 (0.3)	3 (0.1)	NA
Death	6 (0.1)	4 (0.1)	2 (0.1)	NA
Expenses (US dollar), mean±s.d.
Cost of hospitalization	1630±400	1513±315	1755±409	<0.001

P values were determined by analysis of variance and Chi-square tests and compared between groups 8–13 and groups 13–18. s.d.: standard deviation; NA: not analyzed.