Table 1.

Participation in 3 National Surveys of AAFP and AAFP NRN Physicians

	AAFP Physicians Surveyed		AAFP NRN Physicians Surveyed
Survey	Members Sample/Population No.	Respondents No. (%)	Members No.	Respondents No. (%)
AAFP = American Academy of Family Physicians; NRN = National Research Network.
^a Survey had 2 follow-up mailings to nonrespondents for both surveyed groups.
^b Number in parentheses signifies effective sample size, or the original sample size minus mailed questionnaires with bad addresses returned to AAFP NRN research office.
^c Survey had 2 follow-up mailings to AAFP member nonrespondents and no follow-up mailings to AAFP NRN nonrespondents.
Hepatitis C, 2003^a	1,200/34,467 (1,189)^b	634 (53)	243	174 (72)
Hyperlipidemia, 2003–2004^c	1,200/33,233 (1,168)^b	676 (58)	258	155 (60)
Pharyngitis, 2004^a	1,000/33,200 (994)^b	583 (59)	263	186 (71)