Table 3

- Associated factors for obstructive sleep apnea and Severe obstructive sleep apnea in morbidly obese patients undergoing bariatric surgery.

Predictors	OSA vs. non-OSA (OR [95% CI])				Severe OSA vs. non-severe OSA (OR [95% CI])
Predictors	Univariable	P-values	Multivariable	P-values	Univariable	P-values	Multivariable	P-values
Age (year)	1.047 (1.028-1.066)	<0.001	1.073 (1.026-1.123)	0.002	1.110 (1.080-1.141)	<0.001	1.120 (1.090-1.152)	<0.001
BMI (kg/m²)	1.05 (1.019-1.082)	0.002	1.044 (0.943-1.157)	0.405	1.062 (1.032-1.093)	<0.001	1.040 (1.015-1.066)	0.002
Neck circumference (inches)	1.261 (1.088-1.463)	0.002	1.14 (0.77-1.688)	0.514	1.190 (1.120-1.263)	<0.001	1.158 (1.089-1.230)	0.001
Waist	1.1 (1.053-1.149)	<0.001	1.019 (0.895-1.161)	0.773	1.091 (1.055-1.128)	<0.001	1.070 (1.035-1.106)	0.001
Waist-hip-ratio	1.05 (1.008-1.094)	0.018	1.073 (1.026-1.123)	0.002	1.053 (1.020-1.087)	0.002	1.038 (1.006-1.071)	0.021
Hemoglobin level (g/L)	1.035 (1.017-1.053)	<0.001	1.025 (1.008-1.042)	0.003	1.025 (0.995-1.056)	0.109	1.013 (0.984-1.043)	0.267
HcT	1.105 (1.041-1.174)	0.001	1.026 (0.914-1.152)	0.658	1.075 (1.038-1.113)	<0.001	1.055 (1.018-1.093)	0.003
Gender (male)	4.588 (2.715-7.753)	<0.001	3.563 (0.825-15.382)	0.089	4.882 (2.895-8.238)	<0.001	3.760 (2.219-6.370)	<0.001
Hypertension	4.569 (2.35-8.884)	<0.001	2.2 (0.604-8.016)	0.232	4.635 (2.403-8.945)	<0.001	2.250 (0.621-8.159)	0.212
Diabetes mellitus	2.232 (1.16-4.294)	0.016	2.120 (1.100-4.090)	0.023	2.265 (1.180-4.360)	0.014	1.920 (0.990-3.724)	0.053
Hypercholesterolemia	2.241 (1.097-4.58)	0.027	2.020 (1.030-3.960)	0.040	2.280 (1.112-4.675)	0.024	1.998 (0.969-4.121)	0.061

OR: odds ratio, CI: confidence interval, OSA: obstructive sleep apnea, BMI: body mass index, HcT: hematocrit