A Clinical Prediction Formula for Apnea-Hypopnea Index

Table 2

Variables identified to be related to AHI in Spearman’s rho test and their correlation coefficients.

Variable	Correlation coefficient	Variable	Correlation coefficient
BMI	0.491	FVC	−0.149
NC	0.358	FEV1%	−0.101
WC	0.371	FEV1/FVC	−0.085
HC	0.112	PaO2	−0.203
Smoking	0.190	PaCO2	0.161
ESS	0.103	SpO2	−0.242
		TS	0.431