Prediction of the efficacy of group cognitive behavioral therapy using heart rate variability based smart wearable devices: a randomized controlled study

Table 2 The demographic and clinical characteristics of GCBT and WLC groups

	GCBT(n = 16)	WLC(n = 17)	T / χ2	p
Mean age, years (SD)	20.24(1.238)	20.82(3.644)	0.597	0.56
Sex, n (%)			0.4	0.55
Male	5(31.25)	6(35.29)
Female	11(68.75)	11(64.71)
Smoking rules, n (%)			2.3	0.13
Never smoke	14(87.50)	17(100.00)
Sometimes smoke (cumulative smoking < 10 packs)	2(12.50)	0
Alcohol history, n (%)			0.8	0.36
Never drink	11(68.75)	17(100.00)
Drink occasionally (less than one time per week)	5(31.25)	0
BMI (kg/m²)	20.25(1.238)	20.82(3.644)	0.597	0.56

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