Table 1.

Mean score of the elements of PSQI before and after intervention

Parameter	Intervention group			Control group			Mann-Whitney
	Mean (SD) pretest	Mean (SD) posttest	P	Mean (SD) pretest	Mean (SD) posttest	P
Subjective sleep quality	2.13 (0.62)	1.63 (0.50)	0.024	2.38 (0.72)	2.25 (0.68)	0.576	P pretest=0.253
							P posttest=0.009
							P delta=0.0307
Sleep latency	1.8 (0.81)	1.13 (1.2)	0.074	2.00 (1.03)	1.88 (1.2)	0.889	P pretest=0.538
							P posttest=0.0805
							P delta=0.0077
Sleep duration	2.38 (0.72)	1.50 (0.89)	0.007	2.25 (1.00)	2.13 (0.96)	0.577	P pretest=0.950
							P posttest=0.040
							P delta=0.0031
Sleep efficiency	>1.63 (1.02)	>0.63 (0.89)	>0.008	1.38 (1.02)	1.25 (1.13)	0.767	P pretest=0.544
							P posttest=0.105
							P delta=3.633×10-5
Sleep disturbance	1.38 (0.50)	1.38 (0.50)	1	1.00 (0.00)	1.00 (0.00)	-	P pretest=0.008
							P posttest=0.008
							-
Use of sleep medication	2.50 (1.03)	2.38 (1.02)	0.533	2.88 (0.34)	3.00 (0.00)	0.164	P pretest=0.332
							P posttest=0.008
							P delta=0.0529
Daytime dysfunction	2.06 (1.12)	1.31 (0.87)	0.018	2.69 (0.48)	2.38 (1.02)	0.572	P pretest=0.096
							P posttest=0.001
							P delta=0.0170
Summation of scores	13.94 (3.70)	9.94 (3.99)	0.009	14.56 (3.31)	13.88 (3.28)	0.553	P pretest=0.414
							P posttest=0.007
							P delta=2.050×10-4

Statistically Significant. Statistically Significant