Table 4.

Multiple linear regression analysis of serum UA as an outcome variable (adjusted R²=0.38) and %TSTs below 95% SaO2 as a predictor variable (controlling for age, BMI, and WHR).

Independent variables	Coefficient	Standard error	t	P
Constant	−3.74
Age (year)	0.01	0.04	0.24	.82
BMI	−0.04	0.06	−0.67	.51
WHR	10.92	3.97	2.75	.01
%TSTs below 95% SaO2	0.02	0.02	1.17	.26

UA: uric acid, %TSTs:percentage of total sleep time spent, SaO₂: arterial oxygen saturation, BMI: body mass index, WHR: waist-hip ratio.