Table 2 Estimated risk, risk difference (RD), risk ratio (RR) with 95% confidence interval (CI) and p values by vaccination status.

From: COVID-19 vaccination lowers SARS-CoV-2 infection risk independent of diabetes, cancer and smoking in SHIP-COVID cohort, Northern Germany

Vaccination status

Infected (n)

Not Infected (n)

Total

Risk

RD

RR (CI 95%)

p-value

0

56

19

75

0.75

Reference

Reference

 

1

6

6

12

0.50

− 0.25

0.67 (− 0.55 to 0.05)

0.08

2

33

22

55

0.60

− 0.15

0.8 (− 0.31 to 0.02)

0.08

3

219

212

431

0.51

− 0.24

0.68 (− 0.35 to 0.13)

0.00

4

21

74

95

0.22

− 0.53

0.29 (− 0.65 to 0.4)

0.00

Total

335

333

668