The authors used data from a California health maintenance organization quality report card to compare the quality of care
delivered by integrated medical groups or practices in individual practice associations. Integrated medical groups did better
on 4 of 6 standard measures of quality: screening for cervical cancer, breast cancer, chlamydia infection, and diabetic retinopathy.
Integrated groups had more quality improvement activities and use of electronic medical records, but these did not account
for the differences in quality.