Table 3 Multivariable analysis of the associations between physical activity levels and spirometry results in percentage of predicted value, regression coefficients expressed for a percent-change per 15-minute period of PA, overall and stratified by smoking status, Pneumolaus baseline (2014–2017) and follow-up (2018–2021), Lausanne, Switzerland

Inactivity

−0.12

(−0.21; −0.03)

− 0.13

(− 0.22; − 0.04)

−0.12

(− 0.34; 0.1)

−0.10

(− 0.20; − 0.01)

−0.13

(− 0.22; − 0.03)

−0.09

(− 0.33; 0.14)

−0.29

(− 0.55; − 0.02)

−0.20

(− 0.43; 0.02)

−0.36

(−1.01; 0.29)

 P-value

0.007

0.004

0.283

0.035

0.011

0.438

0.035

0.080

0.281

Light PA

0.35

(0.18; 0.52)

0.37

(0.22; 0.52)

0.13

(−0.27; 0.52)

0.30

(0.12; 0.48)

0.34

(0.18; 0.5)

0.01

(−0.42; 0.43)

0.65

(0.19; 1.12)

0.54

(0.10; 0.98)

0.93

(−0.10; 1.97)

 P-value

< 0.001

< 0.001

0.528

0.001

< 0.001

0.978

0.006

0.015

0.077

Moderate PA

0.76

(0.37; 1.15)

0.81

(0.44; 1.18)

0

(−0.93; 0.93)

0.58

(0.18; 0.99)

0.70

(0.31; 1.09)

−0.44

(−1.42; 0.53)

2.24

(1.07; 3.42)

1.83

(0.69; 2.97)

3.20

(0.56; 5.84)

 P-value

< 0.001

< 0.001

0.999

0.005

< 0.001

0.374

< 0.001

0.002

0.018

Vigorous PA

1.05

(−0.19; 2.30)

1.34

(0.26; 2.42)

−0.24

(−3.32; 2.84)

1.02

(− 0.19; 2.24)

1.38

(0.27; 2.49)

− 0.80

(− 3.79; 2.19)

5.48

(− 0.50; 11.5)

3.28

(−2.82; 9.37)

17.7

(6.56; 28.9)

 P-value

0.097

0.015

0.879

0.099

0.015

0.600

0.073

0.292

0.002