a nonsignificant trendP = 0.09
A significant association was observed between BMI and AFO on spirometry (coefficient = −0.137; P = 0.02), percentage predicted FEV 1 (coefficient = 0.14; P = 0.02), FVC (coefficient = 0.13; P = 0.03), and peak expiratory flow (coefficient = 0.14; P = 0.02), with a nonsignificant trend noted between BMI and FEV 25%–75% (coefficient = 0.1; P = 0.09).