Table 2.

Summary of socioeconomic and demographic characteristics in 29 urban and 60 rural counties of Zhejiang Province.

Mean (SD)	Definition	Sources	Unit	Urban counties	Rural counties
Male	Percent population of males	Population Census Office and National Bureau of Statistics of China (2012)	%	51.5 (46.5)	51.2 (50.6)
Children	Percent population $<15\mathrm{y}$ of age		%	12.0 (2.6)	12.7 (3.3)
Elderly	Percent population $>65\mathrm{y}$ of age		%	9.3 (2.3)	10.6 (1.9)
Education	Average years of schooling		year	9.7 (1.2)	8.1 (0.5)
Primary industry employment	Percent population employed in primary industry (agriculture, forestry and fisheries)		%	7.3 (7.1)	26.8 (16.0)
Hospital beds	Number of hospital beds per ${10}^4$ people		/${10}^4$ people	88.0 (74.8)	32.4 (14.7)
Air conditioner	Number of air conditioners per household	Hangzhou Statistical Bureau (2013)	/household	1.7 (0.2)	1.2 (0.2)
GDP	Gross domestic product per capita		${10}^3$ RMB	87.1 (43.2)	58.5 (31.5)