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Table 5 Reduction in the number needed to screen

From: Development and validation of a search filter to identify equity-focused studies: reducing the number needed to screen

  MEDLINE  
NNSa, N Reduction in NNS, n (%) NNSa, N Reduction in NNS, n (%)
(1) Unfiltered strategy 14 452 - 26 552 -
(2) (1) plus specific terms 3 203 11 249 (77.8) 6 092 20 460 (77.1)
(3) (1) plus non-specific terms 4 193 10 259 (70.9) 6 081 20 471 (77.1)
(4) (1) plus combined strategy 5 824 8 628 (59.7) 9 690 16 862 (63.5)
  1. NNS number need to screen
  2. aNot de-duplicated