Re: ". Among physicians with a high volume of patients, however, there was no association between physician age and patient mortality. Readmissions did not vary with physician age, while costs of care were slightly higher among older physicians."

So it's not just age per se, but age plus lack of case quantity.

Which now raises the questions:

1) How are patients assigned to doctors? Is there something else that effects outcomes?

2) Why are some docs carrying less patients? Is that the cause, and age the correlation?