Table 3.

Model Statistics for Sleep Quality Associated With Suicide Risk at 10 Follow-up Years

Risk Factor and Model Adjustment	χ2 Wald Statistic	OR (95% CI)	P Value	χ2 Wald Statistica	OR (95% CI)a	P Valuea
SQI total score	10.87b	1.39 (1.14-1.69)	.001	5.33c	1.30 (1.04-1.63)	.02
SQI item 1: difficulty falling asleep	7.88b	2.24 (1.27-3.93)	.005	3.11	1.76 (0.94-3.29)	.08
SQI item 2: difficulty staying asleep	3.35	1.65 (0.96-2.82)	.07	1.49	1.44 (0.78-2.63)	.23
SQI item 3: early morning awakening	1.37	1.40 (0.79-2.49)	.25	0.17	1.14 (0.60-2.15)	.68
SQI item 4: daytime sleepiness	2.29	1.52 (0.88-2.64)	.13	1.65	1.48 (0.81-2.70)	.20
SQI item 5: nonrestorative sleep	8.43b	2.17 (1.28-3.67)	.004	5.14c	1.98 (1.09-3.59)	.03

Abbreviations: CES-D, Center for Epidemiological Studies–Depression Scale; OR, odds ratio; SQI, Sleep Quality Index.

^aAdjustment for the CES-D total scores in themodel.

^bP < .01.

^cP < .05.