Table 4.

Moderated multiple regression for pain severity and pain interference as predictor variables and sleep quality as moderator variable on depression.

	b	t	p
R = 0.44, R2 = 0.19, F = 50.75, p ≤ 0.001
BPI pain severity	0.31	4.14	<0.001
PSQI sleep quality	0.34	9.45	<0.001
Pain severity * sleep quality	0.01	0.72	0.474
SEP	−0.74	−5.30	<0.001
MSK pain	−0.65	−2.50	0.013
R = 0.54, R2 = 0.29, F = 72.76, p ≤ 0.001
BPI pain interference	0.77	12.8	<0.001
PSQI sleep quality	0.22	6.24	<0.001
Pain interference * sleep quality	0.03	2.20	0.028
Gender	−0.77	−2.14	0.033
SEP	−0.50	−3.84	<0.001
Chronic widespread pain	0.58	2.34	0.020

Bold text displays results from the moderated multiple regression analyses.