Cost analysis and efficacy of recruitment strategies used in a large pragmatic community-based clinical trial targeting low-income seniors: a comparative descriptive analysis

Table 4 Effectiveness of mail strategies

Mail-out strategy	Initial Contacts (total mailed)	Number of calls into VOXCO N (% callers out of total mailed)	Contacts who ended up enrolling in the study
Mail-out strategy	Initial Contacts (total mailed)		N	% enrolled out of total mailed	% enrolled from total number of calls
All mail strategies	176,822	6384 (3.61%)	1358	0.768%	21.3%
Canada Post mail-out	122,000	300 (0.246%)	198	0.162%	66.0%
Coronary angiogram registry	4780	4780 (100%)^a	630	13.2%	13.2%
Contact after hospital discharge	50,042	1304 (2.61%)	530	1.06%	40.6%

^aThis strategy was unique in that we actively called all contacts, rather than simply providing them with the survey unit phone number

ISSN: 1745-6215