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Table 4 Results for sensitivity, specificity, precision, NNR and NNS of the filter evaluated in each review

From: Development and evaluation of a search filter to identify prognostic factor studies in Ovid MEDLINE

Study Number of included studies in SR Number of studies retrieved in original SR search Sensitivity (%) Specificity (%) Precision (%) NNR Time saved (%)
Kamiya [33] 12 120 100 46 17 6 42
Pinheiro [34] 3 1314 100 37 0.4 278 37
Westby [29] 16 784 31.25 70 2 47 70
Aldin [30] 22 5562 100 35 0.6 164 35
Yang [32] 13 565 100 44 4 26 41
Takagi [31] 7 100 100 14 8 12 13
  1. SR systematic review, NNR number needed to read