RECRUITMENT OF HEALTHY PARTICIPANTS FOR STUDIES ON RISKS FOR ALCOHOLISM: EFFECTIVENESS OF RANDOM DIGIT DIALLING

摘要

Aims: 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 vs $2272 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.