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Table 7 Number of digital retention tools CTUs mentioned that had impressed them, broken down by category

From: Using digital tools in the recruitment and retention in randomised controlled trials: survey of UK Clinical Trial Units and a qualitative study

Retention toolsn (%)
SMS / email reminders10 (67)
Study websites0 (0)
Apps and web-based data collection0 (0)
Social media1 (7)
Other – in-house4 (18)
  1. CTU Clinical Trials Unit