Table 3.

Summary of logistic regression for screening variables predicting AHI ≥15/h in major depression (n = 703)

Variables	Adjusted OR (IC 95%)	P-value
Gender		<0.001
Male	10.71 (5.02 to 22.86)
Female	1
Snoring		0.007
Yes	2.36 (1.27 to 4.39)
No	1
Epworth		0.002
≤ 10	1
> 10	2.45 (1.39 to 4.35)
Ferritin (μg/L)		0.009
< 300	1
≥ 300	2.27 (1.22 to 4.20)
CRP (mg/L)		0.039
≤ 7	1
> 7	2.76 (1.05 to 7.23)
BMI (kg/m2)		0.019
< 25	1
≥ 25 & <30	2.06 (0.93 to 4.59)
≥ 30	2.62 (1.20 to 5.73)
Age (years)		<0.001
< 50	1
≥ 50	3.42 (1.94 to 6.02)
ISI		<0.001
< 15	3.51 (1.96 to 6.29)
≥ 15	1
Metabolic syndrome		0.015
Yes	2.45 (1.19 to 5.02)
No	1
Sleep duration (hour)		0.039
< 8	1
≥ 8	1.77 (1.03 to 3.05)

Not included in the model because not significant: BDI, benzodiazepines, Z-drugs, antidepressants, smoking and alcohol

Adequacy of model: Hosmer-Lemeshow chi2 (p = 0.863)

Specificity of model: Linktest (linear component p < 0.001 and nonlinear component p = 0.638)

BMI Body Mass Index, ISI Insomnia Severity Index, BDI Beck Depression Inventory, AHI Apnea-Hypopnea Index