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A comment on Breast-cancer death rate drops almost 40 percent. Parent comment

Re:Breast-cancer death rate drops almost 40 percent by klodolph on Tuesday October 03, 2017 @02:55PM (#15395020)
The streetlight effect? If you want to measure median age, you're not going to get the data for a while.
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Re:Breast-cancer death rate drops almost 40 percent by neves on Tuesday October 03, 2017 @04:28PM (#15395882)
These studies are darn expensive. To track people for 10 years would almost double the cost of it.

Maybe even greater is the opportunity cost. If you have a good result, it would take the double of time for the society to benefit from it.

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