Year of publication: The year in which the original article from which the data was extracted was published
Reporting year (Blood Donors only): The year for which the data extracted was reported to the publishing authority i.e. Council of Europe
Country: Country hosting the population for which the study/report provides seroprevalence estimates
Geographical coverage: Coverage of the sample population by the study design, in geographic terms
Last year of recruitment: Year during which the recruitment of participants was concluded
Study population: Description of sample population
Sampling method: Description or characteristics of sampling method
Total sampled: Total number of individuals invited to be a participant (denominator)
Response rate: Proportion of invited who accepted to be tested. Calculated as number tested/total sampled unless otherwise reported in the study.
Country/Region of origin (Migrants only): Refers to country of birth/ethnicity or country of birth/ethnicity of parents
Generation (Migrants only):
First: People who are foreign-born
Second: People considered migrants based on their ethnicity (e.g. self-reported or where one/both parents are foreign-born), but who themselves are born in the country of residence
Age range: Categorised as minimum and maximum, in years. Not a filterable variable.
Children: <18 years
Adults: ≥18 years
All: Both adults and children i.e. <18 years and ≥18
Note that some studies may classify >15 years as adults
Specimen: Biological material collected from the participant/cadaver for the diagnostic test
Diagnostic test: Type of laboratory test used for the detection of the biomarker
Biomarker: Specific biomarker detected by the diagnostic test
Number tested: Number of individuals who were tested (numerator)
Number positive: Number of individuals found to be positive for the biomarker
Point estimate of prevalence: Proportion of number tested who were found positive, calculated as number positive/number tested as a percentage
95% CI of estimate: 95% confidence interval of the prevalence estimate calculated using Fischer method or any other method as specified in the study. Includes lower and upper CI of the estimate.
Risk of bias: An ad hoc risk of bias framework as developed by the original ECDC review team (reference), that assessed different domains across populations. Points were given for representativeness or lower risk of bias in each domain, and the total score obtained by adding up scores across domains. Higher scores indicate lower risk of bias.
General population: Domains assessed: age, gender, sampling method & response rate and population coverage
Pregnant women: Domains assessed: sampling method and population coverage
MSM: Domain assessed: Sampling venue coverage
Prisoners: Domains assessed: age, gender, proportion of PWID, sampling method and population coverage
Source: The study or report from which the data was obtained.