Table 1.

Comparison of Relaxation Among Group 1, Group 2, and Group 3 (Control)

Relaxation	Change During the Experiment			p
	Mean Change (SD)
	Group 1 (n=20)	Group 2 (n=20)	Group 3 (n=20)
1. score (the visual Analogue Scale for Relaxation)	+1.95 (0.94) **	+3.45 (0.94) **	+0.25 (0.55) **	<0.001
2. percentage stress as determined by the change in the heart rate during sleep	−4.73 (1.17) **	−8.63 (1.48) **	−0.77 (2.18) **	<0.001
3. heart rate change during sleep	−5.38 (2.28) **	−10.85 (2.48) **	−0.25 (2.25) **	<0.001

Notes: ** p < 0.001 Multiple comparisons by Scheffe’s method.