Re: Patient reported outcome measures: how are we feeling today?
I agree that part of the pre-op post-op EQ-5D index correlation is likely to be due to some regression to mean. But this is not inevitable. For eg, it is not necessarily the case that patients with poorer health scores pre op will record higher gains post op than ‘healthier’ pre op patients. Poorer health pre op could mean less capacity to benefit due to co-morbidities or other reasons associated with or causing the low pre op score. However, it would have been better to have placed a warning on the figure!
Competing interests: No competing interests