Table 3 Results of generalized linear mixed (GLM) model analysis of the sum of Comfort Score (a) and Symptom Score (b) in 40 subjects without mask (NM) and with masks (SM, CM, FFP2) during physical exertion (ergometry, CPET) and during 4 h workplace examination.

From: Influence of face masks on the subjective impairment at different physical workloads

 

Reference

Δ mask vs. no mask

Sum score without mask (NM)

SM

CM

FFP2

(a) Comfort Score

 Ergometry

  Pre

9.09

0.96

1.46

3.05

  E1

9.10

2.49

2.48

5.29

0.007

0.077

0.001

  E2

9.77

4.39

5.15

8.93

 < 0.0001

 < 0.0001

 < 0.0001

  E3

10.77

6.57

6.94

13.70

 < 0.0001

 < 0.0001

 < 0.0001

  Post

10.75

4.95

5.55

11.06

 < 0.0001

 < 0.0001

 < 0.0001

 CPET

  Pre

12.89

0.53

1.03

1.62

  E1

13.99

1.10

1.58

3.55

0.576

0.636

0.097

  E2

16.91

1.19

2.43

5.00

0.677

0.389

0.036

  E3

20.20

2.27

3.93

6.68

0.291

0.108

0.009

  Post

18.06

1.42

2.07

3.91

0.569

0.610

0.218

 Workplace

  Pre

9.30

0.65

0.13

0.23

  30

9.04

2.49

2.53

6.53

0.002

 < 0.0001

 < 0.0001

  60

9.05

3.33

3.44

7.15

 < 0.0001

 < 0.0001

 < 0.0001

  90

9.03

3.52

3.96

9.15

 < 0.0001

 < 0.0001

 < 0.0001

  150

9.06

3.77

4.01

10.55

 < 0.0001

 < 0.0001

 < 0.0001

  210

9.16

3.92

6.94

11.03

 < 0.0001

 < 0.0001

 < 0.0001

  240

9.03

4.40

4.18

11.91

 < 0.0001

 < 0.0001

 < 0.0001

  Post

9.05

0.56

0.82

0.45

0.877

0.125

0.612

(b) Symptom Score

 Ergometry

  Pre

16.24

0.11

0.15

0.05

  Post

17.62

1.17

1.00

2.41

0.023

0.064

 < 0.0001

 CPET

  Pre

16.52

0.12

0.49

0.7

  Post

18.74

1.07

0.72

2.08

0.138

0.796

0.054

 Workplace

  Pre

16.27

0.27

0.19

0.07

  30

6.18

0.62

0.45

1.38

0.286

0.410

 < 0.0001

  60

16.20

0.97

0.77

1.92

0.083

0.144

 < 0.0001

  90

16.22

1.13

0.84

2.17

0.031

0.097

 < 0.0001

  150

16.17

1.19

0.87

2.76

0.044

0.133

 < 0.0001

  210

16.40

1.30

0.81

3.17

0.043

0.211

 < 0.0001

  240

16.37

1.26

0.89

2.99

0.057

0.174

 < 0.0001

  Post

16.18

0.47

0.34

0.73

0.508

0.613

0.026

  1. The situation without mask at each time of measurement was always used as reference. For NM geometric mean, for the three mask types (SM, CM, FFP2) differences to NM (Δ) and p values (< 0.05 marked bold) are shown.
  2. The load levels correspond to light work (pre and post), moderate (E1), heavy (E2) and very heavy work (E3).
  3. NM no mask, SM surgical mask, CM community mask, FFP2 filtering face piece class 2, CPET cardiopulmonary exercise test.
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