Fig. 4From: Abstract screening using the automated tool Rayyan: results of effectiveness in three diagnostic test accuracy systematic reviewsEvaluation metrics for the test accuracy for identifying eligible records for the 3 SRs in each screening stage for a) a threshold of less than 2.5 for exclusion; b) a threshold of 2.5 and less for exclusion. NPV: Negative predictive value, PPV: Positive predictive valueBack to article page