Table 1

 Practice demographics and reporting

Practice size (patients)Patient populationStudy participation (months)Reports related to patient safety
Small1 (2000)Suburban, white, elderly1114
Small2 (2200)Inner city, ethnically diverse1614
Medium (5800)Inner city, white1115
Large1 (10 200)Inner city, ethnically diverse1630
Large2 (10 602)Inner city, ethnically diverse65