© 2003 by Oxford University Press
© 2003 Oxford University Press
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Travel Distance and Trial Outcomes
Several observational studies have shown that patients who travel out of their neighborhoods to receive medical care at specialized centers may have different, and often better, outcomes than local patients who are treated at the same centers. Using data from four phase II clinical studies of treatments for head and neck cancer, Lamont et al. (p. 1370) found a similar distance bias. Patients who lived more than 15 miles from the treating institution had one-third of the risk of death of those who lived closer. Moreover, with every 10 miles a
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