Static lung volumes and diffusion capacity in adults 30 years after being diagnosed with asthma

Table 1 Patient characteristics in the TRAIL cohort according to asthma status at the follow-up visit

Variables	Active asthma (n = 106)	Asthma in complete remission (n = 19)	P-value
Age, yr	62.1 \(\pm\) 8.4	59.4 \(\pm\) 9.5	0.2034
Female/Male sex, n	61/45	14/5	0.2136
Height, cm	172.0 \(\pm\) 9.1	172.8 \(\pm\) 7.5	0.7049
Weight, kg	79.5 \(\pm\) 15.9	78.7 \(\pm\) 17.1	0.8555
BMI, kg/m²	26.0 (23.7—28.6)	26.2 (22.9—29.8)	0.7258
Smokers, n (%)	77 (62%)	14 (74%)	1.0000
Smoking, pack yr	26.8 \(\pm\) 12.2	14.1 \(\pm\) 61	0.540
FVC % pred	100.2 \(\pm\) 15.7	106.3 \(\pm\) 15.0	0.1199
FEV₁% pred	83.9 \(\pm\) 19.17	98.5 \(\pm\) 17.8	0.0025
FEV₁/FVC ratio	0.65 \(\pm\) 0.09	0.73 \(\pm\) 0.06	0.0002
TLC% pred	105.4 \(\pm\) 12.0	105.7 \(\pm\) 11.5	0.9045
DLCO %pred	87.7 \(\pm\) 17.3	84.7 \(\pm\) 11.6	0.3574
DLCO/VA %pred	100.4 \(\pm\) 16.1	93.9 \(\pm\) 10.3	0.0324
RV % pred	123.7 \(\pm\) 26.7	111.8 \(\pm\) 21.6	0.0713
RV/TLC ratio	0.43 \(\pm\) 0.09	0.38 \(\pm\) 0.06	0.0045
sR_aw % pred	145.7 \(\pm\) 96.5	117.0 \(\pm\) 77.3	0.2228

Values are given as mean \(\pm\) standard deviation, for BMI median (25^th-75^th percentile)
FVC Forced vital capacity, FEV₁ Forced expiratory volume after one second, TLC Total lung capacity, DLCO SB total diffusing capacity for carbon monoxide, DLCO/VA diffusing capacity when adjusted for volume, RV Residual volume, sR_aw Total airway resistance. N = numbers of patients with either active asthma or patients with asthma in remission. 3 (active asthma) persons could not complete static lung measurement and 5 persons (4 active asthma and 1 in remission) could not complete diffusion capacity

ISSN: 2054-7064