Table 3. Device-related scores.

Variables	Experimental group (n = 20)	Control group (n = 18)	P
Days of device use, days	13.80 ± 0.41	13.61 ± 1.50	0.573
Number of times the device was used, No.	26.10 ± 2.55	26.33 ± 2.89	0.718
Device satisfaction, score	7.85 ± 1.31	6.72 ± 1.07	0.008**
Side effects of using the device	2 (10.0)	0 (0.00)	0.168

Data are presented as mean ± standard deviation for numerical data and as number (percentage) for categorized data.

Bold face P values denote statistical significance: ^**P < 0.01.