http://macyfoundation.org/docs/macy_pubs/pub_grahamcenterstudy.pdf
Students with no debt were the least likely to go into primary care. Students with debt above $250,000 also less likely to go into primary care. Students with ‘middling’ debt and some scholarship money were the most likely.
Other interesting findings: Married students were more likely to do family practice. Female students least likely to practice in a rural area.