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Table 2 Examples of reported precisions and recalls from review of the literature

From: Combination of conditional random field with a rule based method in the extraction of PICO elements

  Population Intervention
Ref. Precision % Recall % Precision % Recall %
[9] 56–77 37–40 77–87 71–80
[13] NA NA 76–89 58–65
[17] 70 24 74-78 56-58
[10] 97 74 NA NA
[7] 66-94 61-84 50-79 26–65