In my data there are five subgroup of age ("0", "1-4", "5-9", "10-14", "15-19"). In some papers, the incidence was calculated for "0-14" and "0-19" using ASRs.
How can I calculate this ASR? (I attached two pages of the article)
You will need to select a standard population with a known age distribution of population. This could be the Standard World Population if you are intersted in international comparisons , or a national or state/ province population if you are interested in regional comparisons . It would need population in 5 year interval categories.
then apply your age specific cancer incidence rates to the standard population.
the age standardised rate (ASR) is then
total expected cases/ total standard population.
see attached extract for worked example
Mehdi Azizmohammad Looha There is good article to learn and do it. Prof. James Leigh explained well. The given article use a nearly similar example, it would be very helpful for you. I use it for teaching the age standardization to students. Article Easy Way to Learn Standardization : Direct and Indirect Methods
Recinda Loraine Sherman
Thank you. I have seen articles in which ASR was reported per million.- Badges
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