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. 2023 Jun 30;102(7):487–494. doi: 10.1159/000531205

Table 3.

Correlations between ACT and spirometry and IOS parameters in 301 asthmatic patients

ACT
FEV3/FEV6, % ρ = 0.068 p = 0.247
FEF25-75, % pred ρ = 0.050 p = 0.397
FEF50, % pred ρ = 0.100 p = 0.088
FEF75, % pred ρ = 0.082 p = 0.159
R5-R20, kPa·s·L−1 ρ = −0.288 p = 0.001
X5, kPa·s·L−1 ρ = 0.213 p = 0.001
AX, kPa·L−1 ρ = −0.248 p = 0.001

FEV3, forced expiratory volume in 3 s; FEV6, forced expiratory volume in 6 s; FEF25-75, forced expiratory flow between 25 and 75%; FEF50, forced expiratory flow at 50%; FEF75, forced expiratory flow at 75%; X5, 5 Hz reactance; AX, reactance area; ACT, Asthma Control Test.