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Volume 3: No. 1, January 2006
This flowchart shows how community volunteers were organized during the enrollment, allocation, follow-up, and analysis of a randomized clinical trial. During the enrollment period, 403 volunteers were assessed for eligibility. Of these, 26 were excluded. Baseline data were collected for the remaining 377 volunteers; of these, 29 refused to participate, leaving 348 participants. Of these 348 volunteers, 174 were allocated to an intervention group, and 174 were allocated to a control group. During the follow-up period, the intervention group lost 21 participants for the following reasons: 3 became ill (unrelated to study), 7 were unwilling to commit to the intervention, 7 failed to complete the follow-up, and 4 could not be located. During the same follow-up period, the control group lost 9 participants for the following reasons: 2 became ill (unrelated to the study), 1 lost interest, 2 were unwilling to commit, and 4 failed to complete follow-up. During analysis, the intervention group consisted of 153 nondropouts and 174 intent-to-treat participants, and the control group consisted of 165 nondropouts and 174 intent-to-treat participants.
Figure 1. Process for a therapeutic lifestyle-modification intervention on a group of community volunteers, Rockford, Ill.
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The opinions expressed by authors contributing to this journal do not necessarily reflect the opinions of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors’ affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
Privacy Policy | Accessibility This page last reviewed October 25, 2011
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