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. 2023 Aug 17;68:1605561. doi: 10.3389/ijph.2023.1605561

TABLE 2.

Incidence rate ratio (IRR) of SARS-CoV-2 from a Poisson regression analysis including age, country of residence, sex, vaccination status, and virus variant among people with PCD included in the COVID-PCD study, n = 62 (Switzerland, 2022).

Unadjusted IRR 95% CI Fully adjusted IRR 95% CI
Age
 0–14 years Reference
 15–49 years 0.34 0.19–0.60 0.42 0.21–0.85
 50 years or older 0.35 0.17–0.72 0.39 0.17–0.92
Country
 United Kingdom Reference
 United States 0.44 0.17–1.10 0.52 0.21–1.32
 Germany 0.73 0.35–1.54 0.46 0.21–1.03
 Other European countries 0.63 0.34–1.54 0.58 0.31–1.08
 Other non-European countries 0.73 0.25–2.16 0.57 0.17–1.94
Sex
 Male Reference
 Female 0.74 0.45–1.22 0.91 0.54–1.55
Vaccination a
 Not fully vaccinated Reference
 Fully vaccinated 1.16 0.68–1.96 0.62 0.29–1.34
Dominant virus variant period
 Original strain Reference
 Alpha 2.63 1.12–6.14 2.69 1.14–6.36
 Delta 3.74 1.70–8.22 4.52 1.92–10.64
 Omicron 9.23 4.11–20.7 13.28 5.22–33.81
a

Full protection after vaccination defined as 14 days after second vaccination with vaccines requiring two shots (e.g., Pfizer, Moderna, AstraZeneca) or 14 days after vaccines requiring one shot (e.g., Janssen/Johnson and Johnson).