Table 2.

Comparison of patient demographics between the urinary retention group and nonretention group.

Variables	Retention group (365 patients)	Nonretention group (15831 patients)	P value
Age (years)	62.8 ± 20.0	44.7 ± 23.0	<0.001
Sex (male/female)	154/211	7,644/7,672	0.004
Type of anesthesia (general/spinal or epidural)	172/193	7,200/8,116	0.966
Type of surgery (joint arthroplasty versus other types of surgery)	180/185	3,604/11,712	<0.001
History of hypertension (yes/no)	183/182	3,447/11,869	<0.001
History of diabetes mellitus (yes/no)	112/253	1,498/13,818	<0.001

The independent t-test or chi square test was used to evaluate the statistical significance in patient demographics between the retention group and nonretention group.