Appendix A3:

Participant-level Characteristics

Participant number	Practice size	Practice setting	Compensation	Region	Patient Panel Size
P1	Large	Urban	Salary	West	2500 or more
P2	Small	Urban	Capitation	West	2000-2499
P3	Small	Suburban	Fee-for-service	West	<1000
P4	Large	Urban	Fee-for-service	West	<1000
P5	Large	Urban	Salary	West	<1000
P6	Small	Urban	Capitation	West	1000-1499
P7	Small	Suburban	Fee-for-service	West	2500 or more
P8	Small	Rural	Fee-for-service	Midwest	1500-1999
P9	Small	Rural	Salary	West	<1000
P10	Large	Suburban	Fee-for-service	Midatlantic or Northeast	2500 or more
P11	Large	Suburban	Fee-for-service	Midwest	2500 or more
P12	Large	Urban	Salary	South Midatlantic or Northeast	<1000
P13	Small	Rural	Fee-for-service	South	<1000
P14	Small	Rural	Fee-for-service	South	2500 or more
P15	Large	Urban	Salary	Northwest	1000-1499
P16	Large	Suburban	Salary	Northwest	<1000
P17	Large	Urban	Salary	Northwest	<1000
P18	Large	Urban	Salary	Northwest	<1000
P19	Small	Suburban	Salary	Northwest	1000-1499
P20	Large	Rural	Fee-for-service	West	1500-1999