Here's an interesting link discussing EMR and PM utilization in both hospital and physician practice settings:
http://www.cdc.gov/nchs/data/ad/ad353.pdf
Although the article is dated March 05, the data is somewhat dated (from 2001-2003). Nonetheless, I found the following to be particularly interesting:
"Among physician office practices, there were no statistically significant differences in EMR use by region, metropolitan status, specialty, physician age, type of practice, or number of managed care contracts."
--Marc
