The Effects of Aromatherapy Massage on Sleep Quality of Nurses on Monthly Rotating Night Shifts

Table 5

GEE analysis of the two groups’ repeated measurement with subjective sleep quality at aromatherapy room.

Parameter	Estimated value of B	Standard error	95% Wald confidence interval		Wald Chi-square	value
			Lower limit	Upper limit
Intercept	2.97	.15	2.68	3.26	404.76	0.000
Treatment group	.02	.21	−.39	.42	.01	0.925
Control group	0	.	.	.	.	.
Posttest				.26	.001	0.978
Pretest	0	.	.	.	.	.
	.58	.23	.14	1.03	6.54	0.011
	0
	0	.	.	.	.	.
	0	.	.	.	.	.
(Scale)	.42