When to Stop Screening
We have a lot of data on how and when to screen for certain diseases, particularly cancers, but relatively little on when to stop. Many guidelines, such as those for mammography and colonoscopies, suggest 70 or 75 years of age, but this is somewhat arbitrary. A particularly useful thing to think about, in my opinion, is the functional status of an individual in relation to ones perceived life expectancy. By perceived life expectancy, I mean how long do you expect an individual to remain alive, especially with a reasonable quality of life, not a life expectancy derived from actuarial data. The data would suggest that an 87 year old man will live for 5 years, but this is based upon a statistical estimate of the population at large. I've met 87 year old men who I would not expect to live a week, and others that I would not be surprised to live to be a hundred. I think this is important to consider when offering a screening test. A woman in excellent at health at age 75 may very well benefit from a mammogram, and should be offered. A woman in terrible health at age 65, with many serous diseases, may not. A rule of thumb I use is "can I see this person living a good quality life for the next ten years?" If the answer is yes, I think it is reasonable to offer a screening test.
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