Recruitment of healthy participants for studies on risks for alcoholism: effectiveness of random digit dialling.
OBJECTIVE
To compare the effectiveness of two strategies for recruiting healthy research volunteers.


METHODS
Demographic characteristics and recruitment costs of participants who completed a laboratory study examining risk factors for alcoholism recruited through random digit dialling (N = 11) and community advertisements (N = 102) were compared.


RESULTS
Advertisement yielded a more representative sample [76% Caucasian, less well educated (M = 15.2 years, SEM = 0.2; P < 0.05), more equally divided by family history of alcoholism (43% FH- and 57% FH+), and lower in SES (M = 42.8, SEM = 1.3; P < 0.05)] and was more cost effective (72 dollars vs 2272 dollars per participant) than random digit dialling.


CONCLUSIONS
Findings are relevant to alcohol researchers trying to determine the recruitment strategy that will yield the most representative sample at the lowest cost.
Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA. Kristen-sorocco@ouhsc.edu
Kristen H
KH
Sorocco
Andrea S
AS
Vincent
Frank L
FL
Collins
Christine A
CA
Johnson
William R
WR
Lovallo
D000293:Adolescent; D000328:Adult; D000329:Advertising; D000437:Alcoholism / Q000453:epidemiology*; D003362:Cost-Benefit Analysis; D003627:Data Interpretation, Statistical; D004493:Education; D004812:Epidemiologic Methods; D005006:Ethnicity; D005260:Female; D006801:Humans; D008297:Male; D009825:Oklahoma / Q000453:epidemiology; D018579:Patient Selection; D011897:Random Allocation; D012107:Research Design; D012959:Socioeconomic Factors; D013689:Telephone