Table 3: The adjusted risk ratios of parameters associated with airflow obstruction by multivariate analysis

Parameters FEV1/FVC ratio<0.7 <LLN
Risk ratio (95%CI) p value Risk ratio (95%CI) p value
Presence of CRS 2.65 (1.09-6.53) 0.0318 2.46 (1.02-5.96) 0.0443
Age ≥ 70 yr 3.45 (1.22-9.74) 0.0199 2.42 (0.83-6.89) 0.1
Male gender 1.86 (0.61-5.90) 0.3 2.64 (0.91-7.47) 0.1
Positive history of cigarette smoking 3.20 (1.13-9.82) 0.0285 5.90 (2.40-16.2) <0.0001


CRS: Chronic Rhinosinusitis, FEV1: Forced Expiratory Volume in 1 second, FVC: Forced Vital Capacity, LLN: Lower Limit of the Normal