Smoking, longer disease duration and absence of rhinosinusitis are related to fixed airway obstruction in Koreans with severe asthma: findings from the COREA study

Table 1 Demographic data of patients with severe asthma

Characteristics	FAO (n = 119)	RAO (n = 116)	P-value
Age, yr	58.3 ± 12.8	47.1 ± 14.3	<0.001
Male, %	64	40	<0.001
BMI, kg/m²	23.4 ± 2.9	23.9 ± 3.5	0.239
Duration of asthma, yr	10 [4 - 18]	6 [3 - 12]	0.083
Onset age, yr	47.5 ± 15.4	39.7 ± 15.6	<0.001
Treatment duration, yr	5 [2 - 10]	5 [3 - 10]	0.851
Numbers of ER visit due to asthma	2 [1 - 5]	2 [1 - 5]	0.751
Numbers of admission due to asthma	2 [1 - 5]	1 [1 - 4]	0.070
Presence of exacerbation, %	51	58	0.339
Presence of atopy, %	34	49	0.068
Presence of rhinosinusitis, %	50	66	0.014
Duration of smoking, pack-years	30 [18.7 - 40]	14 [4.5 - 25]	<0.001
Smoking, current/ex/non, n	15/61/24	14/42/44	0.003

Abbreviations:
FAO, fixed airway obstruction; RAO, reversible airway obstruction; ER, emergency room
Data are presented as mean ± SD, % or median [interquartile range].
P-values were determined using the Mann-Whitney U-test, chi-square or Fisher's test.

ISSN: 1465-993X