Table 1.

Stage of research and source and description of data

	Stage of research
	1: Focus groups		2: Interviews		3: Site observations
Description	Physicians (2 groups)	Office managers (2 groups)	Adopters	Non-adopters	Indiana	Maryland
Number and type of participants	13 MDs 1 Nurse practitioner	5 OMs 7 Medical assts	2 OMs	1 MD	Interviewed/ shadowed: 6 MDs 3 Residents 1 OM 4 Nurses 1 Medical asst	Interviewed/ shadowed: 4 MDs 3 Nurses 1 OM
Number and type of practices represented	14 Total 5 Internal med 7 Pediatrics 1 Family practice 1 Endocrinology	7 Total 4 Internal med 1 Pediatrics 1 Family practice 1 Rheumatology	1 Pediatric (4 MDs, 4 NPs) 1 Family practice (2 MDs)	1 Family practice (1 MD)	1 Family medicine residency practice	1 Pediatric practice
Descriptive data and notes	The practice sizes varied from 1 to 79 doctors (mean=6.7; median=2; mode=1; standard deviation=16.9). The population of the cities represented in our sample of practices ranged from 2635 to 67 097 (mean=31 372; median=28 748; standard deviation=19 805)		The pediatric practice was part of a physician-hospital organization (PHO) consisting of three offices	Non-adopter, practicing medicine 40+ years, believes it is too time consuming to learn to use eRx	We collected unstructured observational notes and created workflow diagrams