Table 2.

Hierarchical linear regression predicting sleep quality complaints measured by PSQI global score

	R 2	R2 Change	F (df)	Sig. F Change	B	SE	p	95% CI	VIF
Step 1	0.263		114.82 (2)				< 0.001
Constant					2.86	0.55	< 0.001	1.78, 3.94
BMI					0.08	0.02	< 0.001	0.04, 0.12	1.02
Depressive symptoms					1.16	0.83	<0.001	1.00, 1.32	1.02
Step 2	0.300	0.038	39.21 (7)	< 0.001			< 0.001
Constant					2.94	0.55	< 0.001	1.86, 4.01
BMI					0.06	0.02	0.004	0.02, 0.10	1.06
Depressive symptoms					1.04	0.09	< 0.001	0.87, 1.20	1.12
Laxative or diuretic misuse					-0.29	0.54	0.594	-1.36, 0.78	1.55
Driven exercise					0.15	0.35	0.66	-0.54, 0.84	1.22
Self-induced vomiting					-0.60	0.62	0.330	-1.81, 0.61	1.46
Objective binge eating					1.38	0.34	< 0.001	0.72, 2.03	1.34
Fasting					1.04	0.35	0.003	0.35, 1.72	1.26

Disordered eating behaviors were dummy-coded with 0 = no clinically significant behaviors or 1 = at or above minimum subthreshold behaviors. BMI = body mass index; PSQI = Pittsburgh Sleep Quality Index. B = unstandardized coefficient, VIF = Variance Inflation Factor