Community A and community B both have crude mortality rates for ischaemic heart disease of 4 per 1000 population per year. The ageadjusted mortality rate for ischaemic heart disease in community A is...

Community A and community B both have crude mortality rates for ischaemic heart disease of 4 per 1000 population per year. The ageadjusted mortality rate for ischaemic heart disease in community A is 5 per 1000 population and the age-adjusted rate for ischaemic heart disease in community B is 3 per 1000 population. Which of the following is correct?

(a) community A has a younger population than community B

(b) community A has an older population than community B

(c) diagnosis is more accurate in community A

(d) diagnosis is more accurate in community B