Table 2 Non-response mechanism at the different follow-ups using multiple imputation

Sex

Male

0.81

[0.66; 0.98]

*

0.97

[0.82; 1.15]

0.83

[0.69; 0.99]

*

Age (years)

14–19

0.82

[0.49; 1.37]

0.59

[0.36; 0.97]

*

0.61

[0.36; 1.05]

20–34

0.59

[0.45; 0.76]

***

0.55

[0.43; 0.69]

***

0.62

[0.49; 0.78]

***

35–49

0.86

[0.67; 1.11]

1.02

[0.81; 1.30]

0.89

[0.70; 1.15]

50–64

1.47

[1.15; 1.88]

**

1.41

[1.13; 1.76]

**

1.57

[1.24; 1.98]

***

65–79

1.87

[1.36; 2.58]

***

2.01

[1.46; 2.75]

***

1.28

[0.95; 1.71]

80 + 

0.88

[0.57; 1.35]

1.06

[0.69; 1.63]

1.48

[0.96; 2.28]

Birth country

Not Germany

0.98

[0.76; 1.27]

0.59

[0.47; 0.74]

***

0.63

[0.50; 0.79]

***

Level of education

In school

1.00

[0.58; 1.73]

0.88

[0.52; 1.50]

1.00

[0.57; 1.76]

\(<\) 12 years

0.94

[0.69; 1.27]

1.10

[0.83; 1.46]

0.93

[0.69; 1.24]

\(\ge\) 12 years

1.06

[0.78; 1.45]

1.03

[0.77; 1.37]

1.08

[0.78; 1.48]

Employment status

Employed

1.07

[0.86; 1.32]

1.06

[0.87; 1.30]

0.98

[0.78; 1.22]

Self employed

0.89

[0.65; 1.23]

0.85

[0.65; 1.11]

0.90

[0.68; 1.20]

Unemployed

0.75

[0.57; 0.99]

*

1.27

[1.00; 1.62]

1.18

[0.90; 1.54]

Others

1.40

[0.84; 2.32]

0.87

[0.58; 1.31]

0.96

[0.59; 1.58]

Risk employment

Yes

0.85

[0.63; 1.14]

1.10

[0.86; 1.41]

1.05

[0.82; 1.34]

Smoking status

Non smoker

1.00

[0.87; 1.16]

1.17

[1.03; 1.33]

*

0.96

[0.84; 1.09]

Past smoker

0.92

[0.78; 1.09]

1.01

[0.87; 1.19]

1.00

[0.87; 1.15]

Current smoker

1.08

[0.91; 1.29]

0.84

[0.72; 0.98]

*

1.05

[0.89; 1.23]

General health

Not good

0.61

[0.42; 0.88]

**

0.84

[0.60; 1.18]

0.59

[0.41; 0.85]

**

Good

0.92

[0.73; 1.15]

1.08

[0.91; 1.28]

0.90

[0.75; 1.08]

Very good

1.28

[1.05; 1.54]

*

1.03

[0.88; 1.21]

1.19

[0.99; 1.44]

Excellent

1.39

[1.11; 1.76]

**

1.07

[0.86; 1.33]

1.57

[1.25; 1.97]

***

Respiratory allergies

Yes

0.92

[0.71; 1.19]

1.39

[1.10; 1.74]

**

0.83

[0.67; 1.02]

Diabetes

Yes

1.37

[0.83; 2.28]

0.78

[0.48; 1.29]

0.81

[0.51; 1.30]

CVD

Yes

1.10

[0.75; 1.60]

1.16

[0.87; 1.54]

1.15

[0.83; 1.58]

Obesity

Yes

0.86

[0.50; 1.50]

0.89

[0.60; 1.31]

1.01

[0.67; 1.51]

Cancer

Yes

0.87

[0.53; 1.43]

0.98

[0.58; 1.67]

1.02

[0.64; 1.63]

Lung disease

Yes

0.93

[0.59; 1.45]

0.81

[0.58; 1.14]

0.97

[0.69; 1.36]

Skin allergies

Yes

1.12

[0.81; 1.55]

0.98

[0.76; 1.27]

1.18

[0.90; 1.54]

Autoimmune disease

Yes

1.28

[0.74; 2.22]

0.97

[0.68; 1.40]

1.34

[0.86; 2.08]

Household type

Single

1.23

[0.93; 1.62]

1.25

[0.96; 1.62]

0.94

[0.73; 1.21]

Couple

1.24

[1.03; 1.49]

*

1.10

[0.94; 1.29]

1.19

[1.01; 1.40]

*

Family

0.85

[0.69; 1.06]

0.86

[0.70; 1.06]

0.89

[0.73; 1.10]

Others

0.77

[0.61; 0.98]

*

0.85

[0.68; 1.06]

1.00

[0.78; 1.29]

Household income (Euro)

 ≤ 2500

0.84

[0.67; 1.05]

0.81

[0.63; 1.04]

0.94

[0.75; 1.17]

2501–4000

1.01

[0.78; 1.30]

0.91

[0.76; 1.10]

0.92

[0.78; 1.08]

4001–6000

1.13

[0.95; 1.33]

1.16

[0.92; 1.46]

1.09

[0.92; 1.28]

6001 + 

1.05

[0.76; 1.44]

1.16

[0.94; 1.44]

1.07

[0.87; 1.32]

Living area/inhabitant (sqm/individual)

 ≤ 30

1.13

[0.92; 1.38]

0.97

[0.81; 1.17]

0.96

[0.80; 1.16]

31–40

1.03

[0.86; 1.23]

0.88

[0.75; 1.03]

1.02

[0.86; 1.21]

41–55

0.91

[0.74; 1.10]

1.27

[1.06; 1.51]

*

1.10

[0.91; 1.33]

56 + 

0.95

[0.74; 1.22]

0.92

[0.74; 1.15]

0.92

[0.75; 1.15]

Building type (nb of apartments)

1–2

1.24

[1.02; 1.51]

*

0.90

[0.76; 1.08]

1.11

[0.92; 1.33]

3–4

0.91

[0.70; 1.19]

1.48

[1.14; 1.91]

**

1.03

[0.80; 1.31]

5 + 

0.88

[0.75; 1.04]

0.75

[0.64; 0.88]

***

0.88

[0.75; 1.03]

Seropositivity in the previous rounds

Negative

4.52

[3.78; 5.40]

***

5.42

[4.74; 6.19]

***

5.27

[4.63; 6.01]

***

Positive

2.01

[1.48; 2.72]

***

1.88

[1.54; 2.30]

***

1.90

[1.57; 2.31]

***

Missing

0.11

[0.09; 0.13]

***

0.10

[0.08; 0.12]

***

0.10

[0.09; 0.12]

***