Table 2 Sociodemographic characteristics and SARS-CoV-2 specific information of the CoCoS study participants (first and second round) compared to the potential participants and to the general adult Cologne population
General adult Cologne population | Potential participants CoCoS round #1 | Participants CoCoS round #1 | Potential participants round #2 | Second examination CoCoS study | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Sample | ||||||||||
Participants (18 yrs. or older)1 | 913,009 | 100% | 6000 | 100% | 2045 | 34.08% | 6000 | 100% | 2192 | 36.53% |
Gendera | ||||||||||
Female | 470,577 | 51.54% | 3090 | 51.51% | 1088 | 53.20% | 3086 | 51.44% | 1189 | 54.24% |
Agea | ||||||||||
18–34 years (%) | 270,538 | 29,63% | 1795 | 29.92% | 518 | 25.33% | 1662 | 27.70% | 506 | 23.08% |
35–59 years old (%) | 388,678 | 42,57% | 2560 | 42.67% | 951 | 46.50% | 2640 | 44.01% | 996 | 45.44% |
60–74 years old (%) | 153,890 | 16,86% | 1007 | 16.79% | 418 | 20.44% | 1095 | 18.25% | 474 | 21.62% |
75 years or older (%) | 99,903 | 10,94% | 637 | 10.62% | 158 | 7.73% | 602 | 10.04% | 216 | 9.85% |
No. of household members | ||||||||||
Average | 913,009 | 1.88 | NA | NA | 1580 | 2.36 | NA | NA | 1689 | 2.32 |
1–2 | 438,859 | 77.68% | NA | NA | 1055 | 66.77% | NA | NA | 1158 | 68.56% |
3–4 | 106,314 | 18.82% | NA | NA | 455 | 28.80% | NA | NA | 472 | 27.95% |
5 or more | 19,800 | 3.50% | NA | NA | 70 | 4.43% | NA | NA | 59 | 3.49% |
Missing valuesb | – | – | – | – | 465 | 22.74% | – | – | 503 | 22.95% |
School education | ||||||||||
No school leaving certificate | 36,520 | 4.00% | NA | NA | 8 | 0.50% | NA | NA | 8 | 0.46% |
Secondary school diploma | 374,333 | 41.00% | NA | NA | 400 | 24.99% | NA | NA | 419 | 24.22% |
High school graduation | 502,155 | 55.00% | NA | NA | 1193 | 74.52% | NA | NA | 1303 | 75.32% |
Missing valuesb | – | – | – | – | 444 | 21.71% | – | – | 462 | 21.08% |
Employment status | ||||||||||
Student/apprenticeship | 122,849 | 13.46% | NA | NA | 163 | 9.85% | NA | NA | 161 | 9.10% |
Employed | 582,613 | 63.81% | NA | NA | 971 | 58.71% | NA | NA | 1025 | 57.91% |
Self-employed | NA | NA | NA | NA | 179 | 10.82% | NA | NA | 201 | 11.36% |
Retired | NA | NA | NA | NA | 243 | 14.69% | NA | NA | 288 | 16.27% |
Unemployed | 45,225 | 4.60% | NA | NA | 38 | 2.23% | NA | NA | 40 | 2.26% |
Other2 | NA | NA | NA | NA | 60 | 3.63% | NA | NA | 60 | 3.40% |
Missing Valuesb | – | – | – | – | 391 | 19.12% | – | – | 422 | 19.25% |
Primary citizenshipa | ||||||||||
German | 727,503 | 79.68% | 4677 | 77.96% | 1894 | 92.62% | 5039 | 84.00% | 2067 | 94.30% |
other than German | 185,506 | 20.32% | 1322 | 22.04% | 151 | 7.38% | 960 | 16.00% | 125 | 5.70% |
Cumulative SARS-CoV-2 cases | ||||||||||
Start of the pandemic until March 14, 2021 | 32,119 | 3.52% | NA | NA | 67 | 3.71% [2.78, 4.64%] | NA | NA | NA | NA |
Start of the pandemic until June 6, 2021 | 46,195 | 5.06% | NA | NA | NA | NA | NA | NA | 90 | 4.61% [3.60, 5.61%] |
Vaccination rate until March 15, 2021 | ||||||||||
Vaccinated at least once | 82,718 | 9,06% | NA | NA | 159 | 9.66% | NA | NA | NA | NA |
Vaccinated twice | 39,684 | 4.35% | NA | NA | 59 | 3.58% | NA | NA | NA | NA |
Not vaccinated | 839,291 | 90.94% | NA | NA | 1487 | 90.34% | NA | NA | NA | NA |
Missing Valuesb | NA | NA | NA | NA | 399 | 19.51% | NA | NA | NA | NA |
Vaccination rate until June 4, 2021 | ||||||||||
Vaccinated at least once | 529,248 | 57,97% | NA | NA | NA | NA | NA | NA | 1396 | 79.82% |
Vaccinated twice | 220,987 | 24.20% | NA | NA | NA | NA | NA | NA | 589 | 33.68% |
Not vaccinated | 383,761 | 42.03% | NA | NA | NA | NA | NA | NA | 353 | 20.18% |
Missing Valuesb | NA | NA | NA | NA | NA | NA | NA | NA | 443 | 20.21% |