Table 4.

Ordinal logistic regression final full model in the whole cohort.

Full model: grouping of the sleep problems (sleeping normally, mild/infrequent problems, sleep problems group) as the dependent variable	B	SE (B)	OR	95% CI	P
Threshold
Sleeping normally	1.272	0.366	3.568	1.740-7.315	<0.001
Mild/infrequent problems	3.924	0.414	50.599	22.481-113.883	<0.001
Pain intensity	0.433	0.062	1.541	1.365-1.740	<0.001
Number of pain sites	0.079	0.040	1.082	1.001-1.170	0.046
Pain duration > 2 y	0.391	0.218	1.478	0.965-2.264	0.073
PASS-20 physiological anxiety	0.077	0.020	1.080	1.039-1.124	<0.001

Nagelkerke pseudo R² = 0.265. Bold indicates P values <0.05.

CI, confidence interval; OR, odds ratio; PASS-20, Pain Anxiety Symptoms Scale-20.