Table 3.

Correlation of Sleep Apnea Variables with Glucose Metabolic Parameters

Variables	Normal Glucose Tolerance					Prediabetes
	HbA1c	Fasting Glucose	30-min Glucose	1-h Glucose	2-h Glucose	HbA1c	Fasting Glucose	30-min Glucose	1-h Glucose	2-h Glucose
AHI (rp, P value)	0.160, 0.016	0.027, 0.653	0.192, 0.001	0.178, 0.003	−0.018, 0.772	0.268, 0.004	0.194, 0.019	−0.013, 0.872	0.021, 0.804	−0.017, 0.835
ODI (rp, P value)	0.163, 0.019	0.038, 0.556	0.253, <0.001	0.188, 0.003	−0.009, 0.892	0.330, 0.001	0.273, 0.002	0.093, 0.301	0.080, 0.372	0.029, 0.751
Mean SpO2 (rp, P value)	−0.173, 0.044	−0.007, 0.932	−0.146, 0.075	−0.117, 0.155	−0.013, 0.870	−0.543, <0.001	−0.298, 0.006	−0.061, 0.581	−0.066, 0.554	−0.020, 0.858
LSpO2 (rp, P value)	−0.170, 0.014	−0.060, 0.351	−0.226, <0.001	−0.230, <0.001	−0.009, 0.890	−0.350, <0.001	−0.201, 0.023	−0.034, 0.701	0.034, 0.705	0.032, 0.719
TS90 (rp, P value)	0.179, 0.009	0.079, 0.207	0.119, 0.057	0.138, 0.027	−0.018, 0.776	0.397, <0.001	0.285, 0.001	0.037, 0.666	0.033, 0.704	−0.117, 0.175

Notes: Data are provided as partial correlation coefficient (r_p) using partial correlation analysis after adjustment for age and sex.

Abbreviations: BMI, body mass index; AHI, apnea-hypopnea index; ODI, oxygen desaturation index; Mean SpO₂, mean pulse oxygen saturation; LSpO₂, lowest pulse oxygen saturation; TS90, percent of total sleep time spent below 90% oxygen saturation; HbA₁c, glycosylated hemoglobin A₁c.