Fig. 2From: Spatiotemporal variations in cardiovascular disease mortality in China from 1991 to 2009Comparasion of the estimated vs. observed death rates of coronary heart disease (CHD) and stroke by ordinary kriging (OK) method in the total population ((a) CHD and (b) stroke) ;and by gender ((c) CHD and (d) stroke) during four periods (1991 - 1995, 1996 - 2000, 2004 - 2005, and 2006 - 2009)Back to article page