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Table 5 Number of digital retention tools that CTUs mentioned they have experience of in relation to retention, 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 tools

n (%)

SMS / email reminders

17 (59)

Study websites

3 (10)

Apps and web-based data collection

3 (10)

Social media

2 (7)

Other – in-house

4 (14)

  1. CTU Clinical Trials Unit