Learning from Large-Scale Wearable Device Data for Predicting the Epidemic Trend of COVID-19

Table 1

Number of users enrolled in the study.

Region	Cities or countries	User number	Cities or countries	User number
North China	Beijing	126,575	Jinan	42,569
	Shijiazhuang	33,257	Taiyuan	16,753
	Tianjin	49,237
Central China	Shanghai	153,711	Nanjing	76,204
	Hangzhou	78,840	Chengdu	64,436
	Wuhan	44,529	Hefei	33,257
	Nanning	19,641	Huanggang	3,412
	Xiaogan	2,358
South China	Guangzhou	92,219	Shenzhen	71,669
	Foshan	20,229	Dongguan	29,146
	Fuzhou	23,061
South-central Europe	Italy	68,494	Portugal	18,343
	Spain	187,788	Switzerland	4,431
	Germany	65,941	Greece	12,830
	France	34,711