Table 2.

Univariate analysis (n = 703)

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)

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