Table 1. Response rate and respondent characteristics, Wisconsin and Minnesota clinicians, 1999 and 2002*.

Characteristic	Wisconsin		Minnesota
	1999	2002	1999	2002
Response rate (%)	71	65	69	70
Practice setting (%)
ER/urgent care	11	22	13	14
Family practice	46	42	49	48
Pediatrics	17	13	12	16
Internal medicine	18	16	17	14
Other	8	7	9	8
Physician (%)	73	72	74	78
Male (%)	61	51	55	53
Mean y in practice	12.6	12.7	13.2	13.8

*ER, emergency room.