This topic got me interested enough to do some reading on the web about
factors involved in travel-distance-to-treatment.
In doing so I came across an article, in a responsible medical journal no less, which was making the extraordinary claim:
"… that patients who travel out of their neighborhood for elective care from specialized medical centers may have better outcomes than local patients with the same illnesses who are treated at the same centers."Or, that:
"… travel distance is positively associated with survival (i.e., patients who live farther from the center survive longer than patients who live close to it)."(Granted this is getting away from this thread's original question, but the claim that this article was making seemed so non-intuitive to me that I thought it might be interesting to mention it as a sidenote to the thread's original question).
The article:
jnci.oxfordjournals.org/content/95/18/1370.fullHowever, toward the end of this article the statement is also made:
"We also cannot exclude the possibility that patients with poor prognoses might have moved closer to the University of Chicago for care before their first medical encounter, thus creating a spurious association between travel distance and outcome."Well, really! Yes, I suppose factors like that really would make a difference, now wouldn't they?! And are there are likely other "factors" as well that can't "be excluded???"
Again, sorry if this is getting off the track a bit, but maybe there actually is some relevance here. That is, if you're planning to do a bit of traveling to your treatment center, you'll know that claims such as that article makes, if you do come across them, are likely of questionable value at the very least.
(A pet peeve of mine: journal articles that imply conclusions when the evidence really isn't there).