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olsA, eht inordgw dcaoss"ieat twi an earenicds "risk awhsetmo lluesad ot tsloceronac- ssidteu only ignhva eht abyilit ot idnf odds fo an saocnstaosii ebwneet proxseue adn cu,otmeo utb not eabsshtli salcau s.laitpoiehrn
Congrats on ruining this site. Let’s make students pay to collaborate with each other via comments
I odwu od a reoitecpvrtes roctoh rhee. I ndto' iknth shti uitsqoen is trrceoc dan oedsivrp oot litelt tfinrmaoino to teg hte rtrceoc srean.w eTim" teif"icnef is het erponta owdr reeh but tehy psyilm nid'td oiecrnds htat ptiovercseetr tcrooh luodw be a erbett isdeng eher as logn sa eht rveibsala aer doe.dc
I think something not mentioned yet is the fact that odds ratio can be used to estimate relative risk in RARE diseases as per the Rare Disease Assumption (where disease prevalence is <10%). Although the cancer in this question is described as "common," (common relative to other cancers), the cancer is still probably rare overall.
I think the key on this question is recognizing how much "most time-efficient" jumps out in the question stem - a pretty unique thing to be specifically asking. Going off that and the fact they want to look at exposure -> outcome, by far the fastest approach would be to find people who currently have the dz in question and then just ask them if they have a previous exposure aka case-control.
If it had stated a 'Rare Cancer' I would have thought case control. But it said common cancer.... Any thoughts on this?
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