. Author manuscript; available in PMC: 2022 Dec 10.

Published in final edited form as: J Expo Sci Environ Epidemiol. 2022 Sep 10;32(6):917–925. doi: 10.1038/s41370-022-00471-4

Table 2.

Assessment of cross-validated predictions from the daily one-hour maximum PM_2.5 model by year

Year	Number of stations	Observations	R²	SD	RMSE	MAD	MAE
2011	12	3,019	0.47	24.26	17.63	16.65	10.36
2012	13	4,025	0.46	21.80	16.09	15.18	10.17
2013	13	4,362	0.58	23.78	15.49	17.28	10.27
2014	14	4,203	0.52	19.54	13.58	14.46	9.76
2015	19	5,194	0.63	25.30	15.34	16.37	9.97
2016	17	5,307	0.62	25.33	15.59	16.48	8.68
2017	17	4,901	0.56	23.86	15.75	15.85	8.48
2018	17	4,633	0.63	19.68	11.96	13.74	7.83
2019	20	5,175	0.66	21.39	12.50	14.08	8.04

Standard deviation (SD), Root mean squared error (RMSE), Mean absolute deviation (MAD), and Mean Absolute Error (MAE)