Table 5.

Correlation between air quality in early years and total mortality in 2012 and 2013.

Air quality index	Total mortality
	2012			2013
	No.	r	p-Value	No.	r	p-Value
Annual average
2003, 2004	41	0.304	0.054	38	0.253	0.125
2008, 2009	76	0.372	0.001	73	0.217	0.066
4-year annual average
2002–2005	74	0.172	0.143	71	0.234	0.049
2007–2010	76	0.364	0.001	73	0.261	0.026

No, no. of cities with available data for air quality measures and total mortality; r, correlation coefficient.

Annual average air quality index in 2003 and 2004 for testing a 10-year time-lag effect on total mortality in 2012 and 2013, and annual quality index in 2008 and 2009 for testing a 5-year time-lag effect, respectively.