Fig. 2

Incidence rate ratios of predictors for infections (Inf.) in staff and children in 2nd (Model 1,2) and 3rd wave (Model 3,4) of the pandemic. ^∗∗∗p<0.001; ^∗∗p<0.01; ^∗p<0.05; ^†p<0.1. Source: Survey data collected by the DJI (ECEC centre registry). Second wave assumed to last from calendar week (CW) 36/2020-04/2021, and third wave from CW 05/2021-22/2021. REWB poisson model with two-way fixed effects, offset for district 7-day incidence (data collected by the Robert Koch-Institute), dependent variable with 1 week lead. Coefficients are displayed as incidence rate ratio, confidence bounds (95%) as bars, effects that do not reach the threshold of p<0.1 are transparent, significant effects are shown as opaque. Controlled for number of children in different age groups (within and between effects), see Supplementary Table S1 for full model, own calculations