Table 1.

Comparison of baseline data between the two groups

Baseline data	Needle free sling group (n = 44)	Middle urethra suspension group (n = 44)	χ2/t	P value
Educational background, n (%)
Junior middle school	3 (6.82)	4 (9.09)	0.352	0.553
High school	19 (43.18)	20 (45.45)	0.104	0.747
Junior college or above	22 (50.00)	20 (45.45)	0.415	0.519
Age (yr)	52.58 (5.96)	53.02 (6.02)	0.345	0.731
Course of disease (yr)	2.06 (0.26)	2.08 (0.28)	0.347	0.729
BMI (kg/m2)	24.51 (2.16)	24.86 (2.22)	0.750	0.456
Birth history (Times)	1.63 (0.28)	1.68 (0.31)	0.794	0.429
Residual urine volume (mL)	15.06 (3.54)	15.22 (3.41)	0.216	0.830

BMI: Body mass index.