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Table 1 Study sample post randomization

From: Harnessing health plan enrollee data to boost membership in patient-powered research networks

 Mail groupEmail group
Total sample for outreach after randomization14,571100%14,574100%
Members with undeliverable home or email address90.1%354624.3%
Members in Do-not-contact database prior to intervention7285.0%7094.9%
Members with deliverable home or email address13,83494.9%10,31970.8%