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Table 4 Recommended core set of site performance metrics (n = 8) retained following the consensus meeting

From: Development of a standardised set of metrics for monitoring site performance in multicentre randomised trials: a Delphi study

Domain

Metric: original wording

Definition: original wording

Metric: amended wording

Definition: amended wording

Recruitment and retention

1. Total actual recruitment versus total target recruitment (%)

The actual number of participants recruited into the trial by the site, versus the target number that was contractually agreed with the site prior to the trial commencing

Current actual recruitment versus target recruitment (%)

The actual number of participants recruited into the trial by the site, at the time of monitoring, versus the target number that was contractually agreed with the site prior to the trial commencing

7. Percentage of potential participants eligible who have consented

The percentage of potential participants who were eligible to participate in the trial and who consented to participate

Percentage of eligible individuals who have consented

The percentage of individuals who were eligible to participate in the trial and who consented to participate

9. Percentage of randomised participants who have withdrawn consent to continue

The percentage of randomised participants who have withdrawn their consent to any further participation in the trial at the site. Collection of any further follow up data is therefore not attempted

  

Data quality

18. Percentage of randomised participants with a query for primary outcome data

The percentage of randomised participants at the site for whom the central trial team has sent one or more queries relating to the primary outcome data back to the site staff

  

21. Percentage of randomised participants with complete data for primary and important secondary outcomes

The percentage of randomised participants at the site with outcome data complete for both the primary outcome and all the agreed important secondary outcomes

Percentage of expected participants with complete data for primary and important secondary outcomes

 

26. Number of adverse events reported per number of randomised participants

Number of Adverse Events reported per number of randomised participants at the site

Percentage of randomised participants with at least one adverse event reported

The percentage of randomised participants at the site who have reported at least one adverse event

Protocol compliance

27. Percentage of randomised participants with at least one protocol violation

The percentage of randomised participants at the site with any protocol violation/s, as defined by the protocol

  

28. Percentage of randomised participants receiving allocated intervention as intended per protocol

The percentage of randomised participants at the site who started the allocated intervention, as specified in the protocol

Percentage of randomised participants who started allocated intervention

 
  1. Numbering of metrics refers to their position in the Delphi survey and Table 3