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Table 3 Effectiveness of different ranked queries on two sub-sets of MEDLINE corresponding to different stages of the systematic review process.

From: Boolean versus ranked querying for biomedical systematic reviews

Index

Target

Query

RBP99

P@500

R@500

P@10,000

R@10,000

Tier 0

Tier 1

T

0.215

0.149

0.565

0.104

0.684

  

TR

0.261

0.195

0.713

0.136

0.885

  

TRC

0.301

0.209

0.747

0.139

0.895

Tier 0

Tier 2

T

0.090

0.066

0.553

0.043

0.690

  

TR

0.121

0.082

0.748

0.052

0.926

  

TRC

0.148

0.090

0.819

0.053

0.944

    

P@50

R@50

P@150

R@150

Tier 1

Tier 3

T

0.249

0.381

0.440

0.265

0.705

  

TR

0.280

0.411

0.495

0.297

0.847

  

TRC

0.290

0.445

0.518

0.310

0.872

  1. Index indicates the source of documents, while Target indicates the relevant documents that the evaluation is based on. Given Tier 1 was smaller set of documents than Tier 0, we used smaller thresholds for the evaluation.
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BMC Medical Informatics and Decision Making

ISSN: 1472-6947

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