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Age standardisation
•
Age has a powerful influence on
cancer risk, so age standardisation
is necessary when comparing
several populations with different
age structures
•
An age-standardised rate (ASR) is
the rate that a population would
have if it had a standard age
structure, eg WHO World Standard
Population
11
WHO World Standard Population Distribution (%)
Age group
% of population
0-4
8.86
5-9
8.69
10-14
8.60
15-19
8.47
20-24
8.22
25-29
7.93
30-34
7.61
35-39
7.15
40-44
6.59
45-49
6.04
50-54
5.37
55-59
4.55
60-64
3.72
65-69
2.96
70-74
2.21
75-79
1.52
80-84
0.91
85-89
0.44
90-94
0.15
95-99
0.04
100+
0.005
Total
100