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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
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BMC Medical Research Methodology

ISSN: 1471-2288

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