Table 1 Overview of recruited subjects including background variables, respiratory parameters, lung function, and DF_meas, measured at rest

Age (years)

47 ± 14

43 ± 15

51 ± 12

Subjects

17

8

9

Height (cm)

179 ± 8

172 \(\pm\)4

184 ± 7

Weight (kg)

77 ± 13

70 ± 5

85 ± 14

V_T (L)

0.94 ± 0.34

0.78 ± 0.22

1.09 ± 0.37

T_bc (min)

0.109 ± 0.045

0.093 ± 0.029

0.124 ± 0.053

V_e (L/min)

8.8 ± 0.9

8.5 ± 0.7

9.0 ± 1.0

DF_meas (a.u.)

0.60 ± 0.12

0.53 ± 0.19

0.64 ± 0.13

r_AiDA (µm)

280 ± 36

260 ± 34

293 ± 32

R₀ (a.u)

0.59 ± 0.16

0.53 ± 0.19

0.64 ± 0.13

VC_AiDA (L)

4.3 ± 0.6

3.9 ± 0.5

4.5 ± 0.6

r_AiDA,1/2 (µm)

261 ± 36

250 ± 23

268 ± 35

R_0,1/2 (a.u.)

0.44 ± 0.14

0.34 ± 0.13

0.50 ± 0.11

½VC_AiDA (L)

2.5 ± 0.4

2.3 ± 0.3

2.8 ± 0.4

R₅ (kPa s/L)

0.33 ± 0.08

0.39 ± 0.07

0.30 ± 0.06

R₂₀ (kPa s/L)

0.32 ± 0.08

0.38 ± 0.07

0.28 ± 0.06

TLC (L)

7.3 ± 1.1

6.3 ± 0.6

8.0 ± 0.7

FRC (L)

3.9 ± 0.9

3.4 ± 0.7

4.2 ± 0.9

FEV₁ (L)

3.8 ± 0.8

3.4 ± 0.3

4.2 ± 0.9

VC (L)

5.0 ± 0.9

4.3 ± 0.3

5.6 ± 0.7

RV (L)

2.2 ± 0.5

1.9 ± 0.4

2.4 ± 0.6

D_LCO (mmol min^− 1 kPa^− 1)

9.2 ± 2.0

7.3 ± 0.3

10.5 ± 1.6

FEV₁/VC

0.764 ± 0.081

0.788 ± 0.078

0.742 ± 0.081

TLC (of pred.)

1.07 ± 0.09

1.09 ± 0.11

1.05 ± 0.07

FRC (of pred.)

1.14 ± 0.23

1.14 ± 0.23

1.14 ± 0.24

FEV₁ of pred.)

1.08 ± 0.12

1.11 ± 0.14

1.05 ± 0.11

VC (of pred.)

1.16 ± 0.14

1.21 ± 0.19

1.13 ± 0.08

RV (of pred.)

1.02 ± 0.15

1.01 ± 0.12

1.03 ± 0.17

FEV₁/VC (of pred.)

0.97 ± 0.08

0.97 ± 0.07

0.95 ± 0.09