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Table 1 Cohort Study Sampling Results

From: Physicians in private practice: reasons for being a social franchise member

Year of Cohort Total SQH membership in 2009 Total enrolled in sample Total reporting/included in analysis Attrition Attrition Rate
2005 76 58 52 9 15.5%
2007 87 76 75 4 5.3%
2009 103 82 77 13 15.9%
Total 266 216 204 26 12.0%