Table 2. Variables associated with the apnea-hypopnea index in the multivariate analysis.

Variable	r	p
Age	0.379	0.027*
Nutritional status	−0.347	0.044*
SpO2	−0.188	0.288
Mean SpO2	−0.333	0.054
Minimum SpO2	−0.223	0.205
Post-BD FEV1	−0.060	0.736
S-K score	0.017	0.924
L-M score	−0.173	0.336
IL-1β	0.130	0.535
ESS score	0.505	0.054

BD: bronchodilator; S-K: Shwachman-Kulczycki; L-M: Lund-Mackay; and ESS: Epworth Sleepiness Scale. *p < 0.05.