ESTRO Multidisciplinary Management of Breast Cancer 2017

Age standardisation

WHO World Standard Population Distribution (%)

• 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

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

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