Table 1.

The impacts of population mobility on COVID-19 outbreaks in South Carolina.

Parameters			State level		County level
					Charleston		Greenville		Horry		Spartanburg		Richland
Model training
	Time windows (days)	1-7		1-9		1-14		1-28		1-20		1-9
	Coefficient of population mobility (95% CI)	0.818 (0.761-0.876)		0.486 (0.338-0.634)		0.278 (0.165-0.390)		0.395 (0.275-0.515)		0.270 (0.118-0.422)		0.157 (0.067-0.246)
	Model evaluation (3-day prediction error)	0.294		2.032		0.214		3.146		0.427		0.396
3-day forecasting
	Cumulative difference	42		30		28		40		66		81
	Accuracy (%)	98.7		85.1		93.3		69.0		76		72.2
7-day forecasting
	Cumulative difference	670		110		147		45		175		144
	Accuracy (%)	90.9		76.7		85.2		85.9		68.3		76.8
14-day forecasting
	Cumulative difference	2858		272		541		217		452		329
	Accuracy (%)	81.6		72.1		74.5		72.6		60.3		73.6