Table 2.

Percent of counties experiencing increasing heart disease mortality, by age group, United States, 2010–2015

County classification	Ages 35–44 years	Ages 45–54 years	Ages 55–64 years	Ages 65–74 years	Ages 35–74 years*
Overall	52.3%	58.5%	69.1%	42.0%	54.5
Quintile of 2010 rates
Lowest rates (first quintile)	42.9	58.2	64.5	37.9	46.1
Second quintile	45.2	60.7	60.4	36.5	48.1
Third quintile	53.1	59.4	64.0	43.5	53.9
Fourth quintile	57.8	56.9	76.6	45.6	62.2
Highest rates (Fifth quintile)	62.4	57.3	80.0	46.5	62.3
2013 NCHS urban/rural classification
Large central metro (most urban)	40.6	34.4	50.0	20.3	31.3
Large fringe metro	53.6	47.3	66.8	32.1	46.4
Medium metro	55.8	61.8	71.3	42.8	56.1
Small metro	53.6	60.7	72.2	47.5	59.0
Nonmetropolitan	52.0	62.4	68.5	43.7	56.2
Noncore (most rural)	48.2	52.4	69.3	38.9	51.3

^*Age standardized to the 2000 US population.