TABLE 5.

Factors affecting the recovery rate of BALF in the CFIP group

Variables		Number of patients (n)	Recovery rate (%)	95%CI	p‐value
Average (range)		214	51.1 (9.0–86.0)
Sex	Male	144	49.4	47.1–51.8	0.022
	Female	70	54.4	50.9–57.8
Age	<65 years	50	51.2	46.4–54.7	0.777
	≥65 years	164	50.5	48.9–53.5
Smoking status	Non‐smoker	68	53.7	50.2–57.2	0.078
	Ex/current smoker	146	49.7	47.2–52.3
Bronchus laterality	Right	131	52.7	50.1–55.2	0.046
	Left	83	48.5	45.4–51.7
Bronchus location	Middle/lingula	38	50.5	45.8–55.2	0.806
	Others	176	51.2	49.0–53.4
%VC	≥65%	144	51.4	48.9–53.8	0.661
	<65%	70	50.4	46.9–53.9
FEV1/FVC	≥80%	150	53.3	51.0–55.7	<0.001
	<80%	64	45.7	42.2–49.2

Abbreviations: BALF, bronchoalveolar lavage fluid; CFIP, chronic fibrotic interstitial pneumonia; CI, confidence interval; FEV₁/FVC, forced expiratory volume in 1 s divided by forced vital capacity.; VC, vital capacity.