Table 3.

Results of hypothesis testing by linear mixed models

	Treatment condition × measurement point		Treatment condition × measurement point × sleep problems
	F	p	F	p
Primary outcomes
Global PSQI score	5.09 (1,23)	0.03	0.25 (1,23)	0.62
C1: sleep quality	2.03 (1,53)	0.16	2.03 (1,53)	0.16
C2: sleep latency	1.57 (1,26)	0.22	8.46 (1,26)	0.01
C3: sleep duration	0.34 (1,16)	0.57	0.34 (1,16)	0.57
C4: sleep efficiency	0.00 (1,56)	0.99	0.00 (1,56)	0.99
C5: sleep disturbance	1.11 (1,97)	0.29	6.06 (1,97)	0.02
C6: sleeping medication	0.59 (1,30)	0.45	0.59 (1,30)	0.45
C7: daytime dysfunction	4.85 (1,107)	0.03	0.45 (1,107)	0.50
Sleepiness	0.29 (1,26)	0.59	5.49 (1,26)	0.03
Secondary outcomes
Depressive symptoms	0.56 (1,10)	0.47	0.00 (1,10)	0.99
Burnout
Emotional exhaustion	0.60 (1,14)	0.45	1.76 (1,14)	0.21
Depersonalization	0.08 (1,16)	0.78	3.10 (1,16)	0.10
Personal accomplishment	1.44 (1,38)	0.24	5.10 (1,38)	0.03
Quality of life
Physical component scores	0.02 (1,26)	0.88	0.02 (1,26)	0.90
Mental component scores	0.13 (1,24)	0.72	0.28 (1,24)	0.60

PSQI Pittsburgh sleep quality index