Table 1.
Crude and Test-Performance Adjusted Anti-SARS-CoV-2 IgG Seroprevalence Among TDA in Kenya, September 30 to October 23, 2020
| Characteristic | N | Seropositive | %Crude anti-SARS-CoV-2 IgG Seroprevalence | 95% Confidence Interval | %Adjusted Anti-SARS-CoV-2 IgG Seroprevalence | 95% Credible Interval |
|---|---|---|---|---|---|---|
| Total | 830 | 329 | 39.6 | 36.3–43.1 | 42.3 | 38.4–46.3 |
| Agea | ||||||
| <30 years | 92 | 42 | 45.7 | 35.2–56.4 | 49.1 | 38.1–59.9 |
| 30–39 years | 276 | 110 | 39.9 | 34.0–45.9 | 42.4 | 35.5–49.1 |
| 40–49 years | 286 | 116 | 40.6 | 34.8–46.5 | 43.4 | 37.4–49.9 |
| 50–59 years | 135 | 48 | 35.6 | 27.5–44.2 | 38.1 | 29.2–47.4 |
| >60 years | 38 | 13 | 34.2 | 19.6–51.4 | 37.0 | 22.3–54.1 |
| Sex | ||||||
| Male | 827 | 326 | 39.4 | 36.1–42.8 | 42.1 | 38.1–46.7 |
| Female | 3 | 3 | 100.0 | 29.2–100.0 | 79.6 | 37.9–99.3 |
| NAT Resulta | ||||||
| Positive | 58 | 32 | 55.2 | 41.5–68.3 | 59.0 | 46.0–72.1 |
| Negative | 727 | 270 | 37.1 | 33.6–40.8 | 39.6 | 35.0–43.9 |
| Nationality | ||||||
| Kenya | 668 | 262 | 39.2 | 35.5–43.0 | 41.9 | 37.7–46.0 |
| Other | 162 | 67 | 41.4 | 33.7–49.4 | 44.2 | 36.3–52.5 |
| Site | ||||||
| Busia OSBP | 365 | 163 | 44.7 | 39.5–49.9 | 47.9 | 42.3–53.8 |
| Magarini | 101 | 43 | 42.6 | 32.8–52.8 | 45.2 | 35.1–55.9 |
| Malaba OSBP | 364 | 123 | 33.8 | 28.9–38.9 | 36.0 | 30.8–41.9 |
Abbreviations: IgG, immunoglobulin G; NAT, nucleic acid test; OSBP, One Stop Border Post; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2; TDA, truck drivers and assistants.
aMissingness: age, n = 3; NAT result, n = 45.