Test statistics for the different TRIM-models for the common frog: AIC, Wald-test, mean standard errors of the overall imputed indices and overall slope of the model.

The classification of the trend follows Pannekoek & van Strien (2005): moderate decline = significant decline, but not significantly more than 5% per year. Covariate groups based on geographic location: 2 covariates (alpine foothills, alpine), 3 covariates (Alpine foothills, Limestone Alps, Central Alps).