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Table 3 Summary of logistic regression for screening variables predicting AHI ≥15/h in major depression (n = 703)

From: Prevalence and risk factors of moderate to severe obstructive sleep apnea syndrome in major depression: a observational and retrospective study on 703 subjects

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)
  1. Not included in the model because not significant: BDI, benzodiazepines, Z-drugs, antidepressants, smoking and alcohol
  2. Adequacy of model: Hosmer-Lemeshow chi2 (p = 0.863)
  3. Specificity of model: Linktest (linear component p < 0.001 and nonlinear component p = 0.638)
  4. BMI Body Mass Index, ISI Insomnia Severity Index, BDI Beck Depression Inventory, AHI Apnea-Hypopnea Index