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Table 2 Examples of performance metrics within each identified category

From: Monitoring performance of sites within multicentre randomised trials: a systematic review of performance metrics

Categories Example performance metric Studies in which metric included
Assessing site potential Site location potential index based on an assessment of the number of patients at an individual site with the disease of interest [14]
Monitoring recruitment Number of participants randomised per site [15, 17, 27]
Monitoring retention Rates of withdrawal by site [20, 25]
Quality of data collection Number of data queries per participant [2, 12, 19]
Trial conduct Protocol violations per site or per participant [12, 15, 23, 27, 30]
Trial safety Serious adverse event (SAE) reporting per site [11, 24, 27]