Uncovering COVID-19 infection determinants in Portugal: towards an evidence-based spatial susceptibility index to support epidemiological containment policies

Table 4 Adjusted R² comparing models with all variables versus the 3 most significant

Model	First wave		Second wave		Third wave
Model	Start	Peak	Start	Peak	Start	Peak
Stepwise variables (number)	0.692 (6)	0.679 (8)	0.741 (9)	0.790 (11)	0.751 (11)	0.748 (7)
Pdens + PWOparish + LQstotrans	0.617	0.600	0.646	0.656	0.669	0.680
Difference	− 0.075	− 0.079	− 0.095	− 0.134	− 0.082	− 0.068

ISSN: 1476-072X