Table 3.

Multiple linear regression analyses of apnea–hypopnea index (n = 36)

Independent Variable	Regression Coefficient	Standard Error	P Value
Dependent variable AHI*
Female sex	−7.47	2.97	0.017
BMI	0.57	0.20	0.008
CT-derived percent emphysema	0.45	0.24	0.069
CT-derived percent gas trapping	−0.31	0.13	0.022

Definition of abbreviations: AHI = apnea–hypopnea index; BMI = body mass index; CT = computed tomography.

^*Regression equation: Predicted AHI = 0.73–7.47 × Female + 0.57 × BMI + 0.45 × CT % Emphysema − 0.31 × CT % Gas Trapping. Standard error of the estimate, 8.32; r² = 0.39.