Table 4.

Regression model with habitual pain intensity as outcome variable (N = 1,862).

	Regression coefficient	Standard error	t	p
(Intercept)	15.56	1.97	7.90	<0.001
Age (y)	0.18	0.03	6.01	<0.001
Female	3.25	1.02	3.20	0.001
ISI	0.50	0.07	6.91	<0.001
4-DSQ Distress	−0.12	0.10	−1.26	0.21
4-DSQ Somatization	1.29	0.10	13.41	<0.001
4-DSQ Anxiety	−0.21	0.16	−1.33	0.18
4-DSQ Depression	0.44	0.21	2.08	0.04

4-DSQ, Four-Dimensional Symptom Questionnaire; ISI, Insomnia Severity Index.