Table 5. Risk factors assessment of subjects at risk of OSA.

Risk factors	Unadjusted			Adjusted
	OR (95% CI)	P value		OR (95% CI)	P value
Gender
Male
Female	0.390 (0.336–0.452)	<0.001		0.496 (0.380–0.646)	<0.001
Age	1.026 (1.020–1.032)	<0.001		1.015 (1.007–1.022)	<0.001
BMI	1.182 (1.155–1.209)	<0.001		1.115 (1.072–1.160)	<0.001
Neck circumference	1.198 (1.171–1.225)	<0.001		1.048 (1.016–1.081)	0.003
Waist circumference	1.068 (1.059–1.076)	<0.001		1.009 (0.995–1.024)	0.187
Smoking status
Never-smokers/former smokers
Current smokers	1.521 (1.247–1.855)	<0.001		0.642 (0.497–0.830)	0.001
Alcohol use
Never-drinker/former drinkers
Current drinkers	1.780 (1.474–2.149)	<0.01		1.140 (0.907–1.433)	0.262
Drinking tea
Never-drinkers/former drinkers
Current drinkers	1.286 (1.086–1.521)	0.003		0.912 (0.757–1.099)	0.335
Exercise
5–7 d/week
3–4 d/week	0.761 (0.598–0.969)	0.027		0.954 (0.736–1.237)	0.722
1–2 d/week	0.770 (0.609–0.974)	0.029		0.990 (0.765–1.281)	0.941
≤3 d/month	0.633 (0.483–0.830)	0.001		0.814 (0.607–1.092)	0.170
Never	0.833 (0.682–1.017)	0.072		1.038 (0.837–1.287)	0.735
Hypertension
Yes	2.011 (1.693–2.388)	<0.001		1.268 (1.044–1.539)	0.017
No/unknown
Dyslipidemia
Yes	1.383 (1.201–1.592)	<0.001		0.941 (0.795–1.114)	0.482
No
HDL-C	0.440 (0.363–0.533)	<0.001		0.974 (0.760–1.248)	0.833
Triglycerides	1.147 (1.083–1.216)	<0.001		1.009 (0.936–1.088)	0814
Creatinine	1.019 (1.015–1.023)	<0.001		1.001 (0.997–1.006)	0.6
Uric acid	1.004 (1.003–1.005)	<0.001		1.001 (1.000–1.002)	0.082

OSA, obstructive sleep apnoea; OR, odds ratio; 95% CI, 95% confidence interval; BMI, body mass index; HDL-C, high-density lipoprotein cholesterol.