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. 2021 Sep 17;7(9):e30010. doi: 10.2196/30010

Table 3.

Multivariable Cox regression analysis showing hazard ratio of a positive SARS-CoV-2 result during follow-up with vaccination in all patients and across different age, ethnic, gender, and IMD decile groups up to day 60 post vaccination.a

Variables Hazard ratio (95% CI) P value
Vaccination

No vaccination (reference) 1 N/Ab

Vaccination 0.64 (0.43-0.95) .03
Age (years)

16-49 (reference) 1 N/A

50-54 0.75 (0.58-0.98) .03

55-59 0.82 (0.64-1.06) .13

60-64 0.79 (0.61-1.02) .07

65-69 0.41 (0.32-0.54) <.001

70-74 0.26 (0.20-0.33) <.001

75-79 0.29 (0.23-0.38) <.001

≥80 0.29 (0.24-0.36) <.001
Care home resident 0.76 (0.56-1.05) .13
Clinically extremely vulnerable 0.30 (0.24-0.38) <.001
Ethnicity

White (reference) 1 N/A

Asian or British Asian 0.91 (0.80-1.02) .11

Black or Black British 0.98 (0.77-1.25) .89

Mixed 1.29 (0.91-1.82) .15

Other ethnic groups 1.06 (0.83-1.35) .65
Gender

Female (reference) 1 N/A

Male 1.02 (0.91-1.15) .69
IMDc decile

1 (reference) 1 N/A

2 1.03 (0.74-1.43) .87

3 1.11 (0.82-1.51) .49

4 0.97 (0.71-1.32) .83

5 1.08 (0.79-1.48) .62

6 1.04 (0.76-1.42) .79

7 0.80 (0.58-1.12) .24

8 0.84 (0.59-1.20) .33

9 0.93 (0.65-1.34) .72

10 0.83 (0.56-1.21) .33

aCox regression model included an interaction term between having the vaccination and individual patient groups (age, ethnicity, gender, IMD decile).

bN/A: not applicable.

cIMD: index of multiple deprivation.