Table 25. Change of Skin Hydration between Treatment Group and Control Group in 3 weeks and 6 weeks(1㎝ below the medial aspect of the elbow)

	Descriptives	V3	V4	Difference	p–value
Control Group	n	24	24	24	0.339b
	Mean±SD	32.018±7.336	33.618±5.043	1.600±7.749
	Median	32.233	33.550	0.500
	Min	13.500	24.733	−13.900
	Max	46.300	44.433	20.200
Treatment Group	n	23	23	23	0.000b
	Mean±SD	37.991±9.140	45.100±10.089	7.109±7.771
	Median	37.100	46.000	4.866
	Min	21.367	28.167	−3.633
	Max	60.367	65.233	33.466
p–value		0.017c	0.000c	0.004d

p-value by paired t-test
p-value by Wilcoxon signed rank test
p-value by Independent two-sample t-test
p-value by Mann-Whitney test