Table 5. Multiple linear regression analysis F(7, 139) = 7.07 (p<0.0001), adjusted R2 = 0.23 of factors associated with COVID-19 Testing Index from final model (n = 147) (data from 00:00 GMT June 3, 2020).
| Independent variables | Mean CovTI (95% CI) | β coefficient (change in CovTI associated with factor) | 95% CI | p value |
|---|---|---|---|---|
| Constant | 20.6 | 4.6–36.6 | ||
| Testing policy | ||||
| No testing policy | 29.7 (17.6–41.9) | Ref. | <0.0001 | |
| Limited testing | 54.0 (49.0–59.0) | 19.4 | 4.5–34.2 | |
| Symptomatic testing | 59.6 (54.7–64.5) | 24.3 | 9.4–39.2 | |
| Open public testing | 66.9 (61.0–72.8) | 31.1 | 15.2–47.0 | |
| Contact tracing policy | 0.001 | |||
| No contact tracing | 43.9 (35.4–52.5) | Ref. | ||
| Limited contact tracing | 54.4 (49.4–59.3) | 6.1 | -3.3–15.4 | |
| Extensive contact tracing | 63.5 (59.3–67.7) | 12.4 | 3.1–21.7 | |
| Geographical setting | 0.007 | |||
| Non-island | 55.5 (52.5–58.8) | Ref. | ||
| Island or island-like | 68.0 (59.7–76.3) | 10.6 | 2.9–18.3 | |
| Form of government | 0.20 | |||
| Federation | 53.5 (45.4–61.5) | Ref. | ||
| Unitary state | 58.3 (54.8–61.7) | 5.1 | -2.6–12.8 |