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Table 2 Univariate analysis (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 % AHI <15/h % AHI ≥15/h OR (IC 95%) P-value
Gender     <0.001
 Male 73.12% 26.88% 11.36 (6.08 to 21.24)
 Female 96.87% 3.13% 1
Snoring     <0.001
 Yes 78.39% 21.61% 4.44 (2.65 to 7.44)
 No 94.15% 5.85% 1
Epworth     0.008
 ≤ 10 89.60% 10.40% 1
 > 10 82.63% 17.37% 1.81 (1.16 to 2.81)
ISI     <0.001
 ≥ 15 89.96% 10.04% 1
 < 15 72.26% 27.74% 3.44 (2.20 to 5.39)
BDI     0.088
 < 12 83.69% 16.31% 1
 ≥ 12 88.17% 11.83% 0.69 (0.45 to 1.06)
Metabolic syndrome     <0.001
 Yes 56.72% 43.28% 6.27 (3.64 to 10.81)
 No 89.15% 10.85% 1
Benzodiazepines use     0.911
 Yes 85.80% 14.20% 1.03 (0.63 to 1.69)
 No 86.14% 13.86% 1
Z-drugs use     0.042
 Yes 96.23% 3.77% 0.23 (0.05 to 0.95)
 No 85.23% 14.77% 1
Antidepressant therapy     0.526
 Yes 85.08% 14.92% 1.15 (0.75 to 1.77)
 No 86.76% 13.24% 1
Smoking     0.176
 Yes 89.14% 10.86% 0.69 (0.41 to 1.18)
 No 85.04% 14.96% 1
Alcohol     0.015
 Yes 80% 20% 1.79 (1.12 to 2.87)
 No 87.77% 12.23% 1
BMI (kg/m2)     <0.001
 < 25 96% 4% 1
 ≥ 25 & <30 83.77% 16.23% 4.65 (2.32 to 9.31)
 ≥ 30 74.06% 25.94% 8.41 (4.37 to 16.17)
Age (years)     <0.001
 < 50 92.66% 7.34% 1
 ≥ 50 73.33% 26.67% 4.59 (2.92 to 7.21)
Sleep duration (hour)     0.130
 < 8 87.82% 12.18% 1
 ≥ 8 83.82% 16.18% 1.39 (0.91 to 2.13)
Ferritin (μg/L)     <0.001
 < 300 90.59% 9.41% 1
 ≥ 300 57.73% 42.27% 7.05 (4.34 to 11.47)
CRP (mg/L)     0.074
 ≤ 7 86.78% 13.22% 1
 > 7 78.33% 21.67% 1.82 (0.94 to 3.50)
  1. BMI Body Mass Index, ISI Insomnia Severity Index, BDI Beck Depression Inventory, AHI Apnea-Hypopnea Index