Table 2.

Spirometry results and bacteria isolated from sputum cultures at the first and second visit of patients.

	Initial Visit (n = 65)	Follow-Up Visit (n = 65)	p
Spirometry, n (%)	45 (69.2)	45 (69.2)	1
‒      ppFEV1, mean (sd)	91.8 (20.4)	93.1 (19.1)	0.65
‒      ppFVC, mean (sd)	90.1 (23.3)	93.3 (24.6)	0.44
‒      FEV1/FVC, mean (sd)	84.4 (10.4)	85.6 (11.5)	0.50
Positive sputum cultures, n (%)	38 (58.4)	3 (13.8)	<0.001
‒      Gram-negative bacteria, n	12	2
‒      Staphylococcus aureus, n	7	1
‒      Pseudomonas aeruginosa, n	7	0
‒      Haemophilus influenzae, n	5	0
‒      Streptococcus pneumoniae, n	4	0
‒      Others, n	3	0