A cohort study is conducted to examine the ...
What if i tell you this is a ques of Attributable risk % in exposed?
AR= 0.02 / IR in exposed (30/1000) = 0.6667
30 case in 1000. So 300 case in 10,000
0.6667 x 300 = 200 or in another word 66% cases of 100 lung cancer cases in smokers is actually due to smoking. so in 300 cases of smokers 200 is actually due to smoking
This is a mind fuck. Lemme tell u guys if any consolation while doing the ques during test i did it with AR = 0.02; NNH = 1/0.02 = 50. 50 persons smoke to cause 1 cancer. 10K smoke to cause 200 cancer.
Sorry if this is a stupid question. Why is it incorrect to simply apply the same proportion (30 cancer per 1000 smokers) to 10,000 smokers?