Table 3.

Changes of cystometry parameters after PS-TENS among children with refractory OAB

Variable	Before TENS	After TENS	p value
No. with detrusor overactivity	30 (94%)	24 (75%)	0.08
Resting detrusor pressure (mm H2O) (mean ± SD)	14.6 ± 3.6	11.5 ± 4.6	0.001
No. of involuntary detrusor contractions (mean ± SD)	4.4 ± 1.4	3.5 ± 2.4	0.06
Maximum involuntary detrusor contractions (mm H2O) (mean ± SD)	14.6 ± 3.6	11.5 ± 4.6	0.001
Cystometric bladder capacity (ml) (mean ± SD)	91 ± 15.8	108 ± 20.1	0.03