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. 2022 Feb 10;210:112921. doi: 10.1016/j.envres.2022.112921

Table 1.

Figures of merit for all the MLR models created. Cross-validation: full.

	free/summer period				confined/autumn period
	R	R_CV	RMSE	RMSE_CV	R	R_CV	RMSE	RMSE_CV
Val d'Aosta	0.895	0.861	13.1	14.3	0.937	0.803	9.87	13.9
Piemonte	0.911	0.887	7.48	8.02	0.979	0.921	4.45	2.64
Lombardia	0.794	0.729	9.05	9.74	0.981	0.955	4.05	1.80
Trento	0.903	0.868	3.35	3.70	0.911	0.746	2.71	3.61
Bolzano	0.905	0.870	5.53	6.13	0.981	0.955	4.07	5.07
Veneto	0.940	0.917	1.66	1.86	0.944	0.875	1.87	2.26
Friuli Venezia Giulia	0.893	0.843	1.83	2.10	0.910	0.767	3.02	3.84
Emilia-Romagna	0.929	0.904	2.78	3.07	0.847	0.427	2.13	2.97