The following table presents data on the incidence of prostate cancer in men living in two different cities.
City A
Age group (years)
Male population in 2010
Number of prostate cancers in 2010
0-44
500,000
50
45-64
250,000
350
65+
25,000
250
Total
775,000
650
City B
Age group (years)
Male population in 2010
Number of prostate cancers in 2010
0-44
1,500,000
80
45-64
600,000
1,000
65+
400,000
2,500
Total
2,500,000
3,580
1. Calculate the crude and age-specific incidence rates of prostate cancer per 100,000 men for the two communities. (8 marks)
2. The age-standardised incidence rate of prostate cancer for city A is 168.7 and for city B is 79.4 per 100,000 men. Briefly discuss the crude and standardised results. (2 marks)