Table 2 Results of the multivariable logistic regression analysis (outcome: antibody positivity, predictors as shown above) on both the complete records and multiply imputed data

Age

16-19

1

1

20-29

0.34

0.03–3.80

0.94

0.11–8.39

30-39

0.43

0.04–4.46

1.10

0.13–9.63

40-49

0.86

0.08–9.15

0.36

1.25

0.14–11.1

0.97

50-59

0.97

0.09–10.5

1.19

0.13–10.8

60-69

0.87

0.06–13.3

1.04

0.10–10.7

Sex

Female

1

1

Male

1.34

0.59–3.05

0.49

0.88

0.51–1.51

0.64

Ethnicity

BAME

1

1

White

0.23

0.05–0.96

0.04

0.39

0.11–1.39

0.15

Ongoing medical condition

No

1

1

Yes

1.18

0.51–2.75

0.70

1.12

0.58–2.16

0.74

Shielding letter

No

1

1

Yes

0.89

0.11–7.42

0.91

0.35

0.04–2.84

0.33

No. in household (incl. self)

1

1

1

2

0.67

0.15–2.91

0.71

1.03

0.35–2.99

0.75

3

1.04

0.24–4.42

1.12

0.38–3.29

4

1.43

0.36–5.66

1.02

0.35–2.97

5+

1.04

0.18–6.03

1.82

0.54–6.11

Workplace

Call Centre

1

1

Food Factory

1.07

0.34–3.41

0.08

2.93

1.26–6.81

<0.01

Non-Food Factory

0.39

0.13–1.14

0.73

0.33–1.60

Work category

Factory floor

1

1

Office

2.00

0.66–6.11

0.40

2.23

1.02–4.87

0.11

Other

1.97

0.60–6.51

1.81

0.78–4.19

Ever travel to work in shared vehicle

No

1

1

Yes

0.18

0.02–1.50

0.11

0.37

0.14–0.95

0.04

Baseline odds

0.40

0.02–10.0

0.08

0.005–1.33