Table 2.
Relative risk and percentage variation of risk in the presence of isolation (delay of 20 days from the onset of symptoms of dengue cases) in regression models with successive inclusion of control variables. State of São Paulo, January to August 2020.
| Explanatory variables | RRa | CI 95% (RR) | PV(%)b | CI 95% (PV) | p-value |
|---|---|---|---|---|---|
| Isolation (lag 20 days) | 0.24 | (0.19 : 0.31) | - 75.6 | (- 80.9: - 75.6) | <0.001 |
| Isolation (lag 20 days) + seasonality | 0.90 | (0.82 : 0.98) | - 9.9 | (- 17.5: - 9.9) | 0.02 |
| Isolation (lag 20 days) + seasonality + day of week | 0.88 | (0.82 : 0.95) | - 11.8 | (- 18.4: - 11.8) | <0.001 |
| Isolation (lag 20 days) + seasonality + day of week + first order autoregressive component | 0.91 | (0.86 : 0.96) | - 9.1 | (- 14.2: - 3.7) | <0.001 |
a
Risk of contracting dengue in the isolation period (1–30%) when compared to the non-isolation period (−4 to 0%).
b
(RR-1)*100: Percentage variation in the risk of contracting dengue due to isolation.