Table 1.
Summary of the main restrictive measures applied in each scenario, with relative dates of occurrences in the Lombardy region (changes with respect to the previous scenario in bold).
Fig 1.
Scatter plot and fractional polynomial line (degree = 2) with 95% confidence intervals of daily incident COVID-19 cases in the ATS territory (without Bollate) in individuals aged 3–11, 12–19, and 20+ years old or more.
Table 2.
Segmented Poisson regression of daily incident COVID-19 cases before and after the school closure intervention (cut-off = six days).
ATS (without Bollate), individuals aged 3–11, 12–19, and 20+ years old or more.
Fig 2.
Interrupted time series of daily incident COVID-19 cases in the ATS territory (without Bollate) in individuals aged 3–11, 12–19, and 20+ years old or more.
Solid line: predicted trend based on the covariate-adjusted segmented Poisson regression model. Dashed line: unadjusted trend.
Fig 3.
Kaplan-Meier survival curves of daily incident COVID-19 cases in the three age groups.
Table 3.
Cox regression-based test for equality of survival curves in the three age groups before and after the intervention (cut-off = six days).