Health information and libraries journal

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• Health Info Libr J · Sep 2011

  Developing a geographic search filter to identify randomised controlled trials in Africa: finding the optimal balance between sensitivity and precision.

  Research on identifying trials using geographic filters is limited. ⋯ The African filter improved precision with some loss in sensitivity. Incomplete reporting of trial location in electronic bibliographic records restricts efficiency of geographic filters. Prospective trial registration should alleviate this.

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