The future impact of population growth and aging on coronary heart disease in China: projections from the Coronary Heart Disease Policy Model-China

Table 2 Variability in the estimated proportions of deaths due to coronary heart disease in China.

Age and sex category	CHEFS* with conservative ICD definition of CHD (main assumption)†	CHEFS with liberal ICD definition of CHD‡	Global Burden of Disease estimates, 2002[36]
Men
35–44 years	0.04	0.04	0.03
45–54	0.04	0.05	0.06
55–64	0.08	0.10	0.07
65–74	0.08	0.09	0.09
75–84	0.06	0.08	0.06
Women
35–44 years	0.03	0.03	0.03
45–54	0.06	0.05	0.06
55–64	0.07	0.09	0.08
65–74	0.08	0.09	0.10
75–84	0.05	0.06	0.11

* China National Hypertension Survey Epidemiology Follow-up Study
†CHD defined as myocardial infarction (ICD-9 410, 412 or ICD-10 I21, I22), angina and other CHD (ICD-9 411, 413 and 414, or IC-10 I20, I23–I25), and a fixed proportion of "ill-defined" cardiovascular disease coded events and deaths.[33] (ICD-9 codes 427.1, 427.4, 427.5, 428, 429.0, 429.1, 429.2, 429.9, 440.9 or ICD-10 I47.2, I49.0, I46, I50, I51.4, I51.5, I51.9, and I70.9). The conservative definition of CHD assumed that very few CHD deaths were misclassified into ill-defined cardiovascular codes, so few of those deaths were counted as CHD deaths.
‡The more liberal coding method used the same ICD codes described above, but assumed that a higher proportion of CHD deaths were mis-coded into the "ill-defined" cardiovascular codes, so more deaths assigned these ill-defined codes are counted as CHD deaths.[33]

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