This trial is active, not recruiting.

Condition physician survey response rates
Treatments $20 cash, $50 cash, $50 check, $100 check
Sponsor Department of Veterans Affairs
Start date June 2009
End date June 2010
Trial size 1000 participants
Trial identifier NCT00853918, DMS-17632, VA HSR&D IIR 03-242


This is a national physician mail survey examining primary care practice patterns. The experimental component of the study (the clinical trial) is a randomized trial of different monetary incentive forms and amounts for physicians invited to participate in the study. Only non-VA physicians will be included in this part of the study. (VA physicians are not allowed to receive monetary incentives.) Physicians will be randomized to receive one of four incentives: $20 cash, $50 cash, a $50 check, or a $100 check. The main outcome measure is the response rate.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Allocation randomized
Intervention model parallel assignment
Masking open label
Primary purpose health services research
$20 cash
$20 cash incentive mailed with survey
$50 cash
$50 cash incentive mailed with survey
$50 check
$50 check incentive mailed with survey
$100 check
$100 check incentive mailed with survey

Primary Outcomes

Survey response rate
time frame: 2 weeks, 2 months (primary), and 6 months after initial mailing

Secondary Outcomes

Item non-response rates
time frame: 2 weeks, 2 months (primary), and 6 months after initial mailing

Eligibility Criteria

Male or female participants of any age.

Inclusion Criteria: - Primary care general internists in the United States, identified through the AMA Physician Masterfile, who practice at least 20 hours per week are eligible to participate. - All physicians included in the sample to whom the survey packets are mailed will be included in the analysis of the incentive experiment, except those for whom a survey packet is returned as undeliverable and those non-respondents identified through follow-up procedures as non-locatable, deceased, or retired. Exclusion Criteria: - Physicians self-identified in the AMA Masterfile as medical subspecialists or hospitalists are excluded from the sample.

Additional Information

Official title Clinical Practice Intensity: Comparing VA to Private Sector Physicians
Principal investigator Brenda E Sirovich, MD, MS
Description This primary care physician survey is being conducted by Harris Interactive, an international survey research firm working collaboratively under contract to VA investigators heading the study. Surveys will be mailed to a random sample of 1000 non-VA primary care general internists practicing 20 or more clinical hours per week, identified via the Physician Masterfile of the American Medical Association. The initial survey mailing, delivered via USPS Priority Mail, will include a cover letter inviting the physician to participate, a 12-page survey booklet (including a cover page, a 9-page survey, and 2 blank pages), a monetary incentive, and a prepaid addressed return envelope. The survey is estimated to take 20 minutes to complete. All survey recipients will also have the opportunity, as part of the survey, to request information about practice patterns in their community. Harris Interactive will randomly assign all invited (non-VA) physicians to receive one of four incentives, included in the initial survey mailing: $20 cash $50 cash $50 check $100 check Non-responders will be contacted two additional times (at approximately 2 and 4 weeks following the initial mailing) by telephone and by mail. Subsequent mailings will include the survey, a cover letter, and a stamped addressed return envelope, but no monetary incentive. Response rates will be compared between the four arms of the trial; between check v. cash; and between different denominations.
Trial information was received from ClinicalTrials.gov and was last updated in June 2010.
Information provided to ClinicalTrials.gov by White River Junction VAMC.