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Table 4 Sensitivity and precision of the search strategies tested

From: Identifying nurse staffing research in Medline: development and testing of empirically derived search strategies with the PubMed interface

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[relevant references]
Sensitivity
(%)
Precision
(%)
NNR*
Development set (78 relevant references)
Sensitive strategy 28,893 [77] 98.7 0.2 483
Precise strategy 461 [40] 51.3 6.1 16
Balanced strategy 4,351 [62] 79.5 1.0 96
PubMed HSR Query sensitive 16,636 [68] 87.2 0.3 328
PubMed HSR Query precise 310 [20] 25.6 5.0 20
Precision set (6 relevant references out of a total of 2,195)
Sensitive strategy 1,775 [6] 100 0.3 297
Precise strategy 34 [5] 83.3 14.7 7
Balanced strategy 278 [5] 83.3 1.8 56
PubMed HSR Query sensitive 1,017 [5] 83.3 0.5 203
PubMed HSR Query precise 20 [3] 50.0 15.0 7
Journal screening set (17 relevant references out of a total of 1,274)
Sensitive strategy 210 [17] 100 8.1 12
Precise strategy 25 [8] 47.1 32.0 3
Balanced strategy 65 [13] 76.5 20.0 5
PubMed HSR Query sensitive 127 [15] 88.2 11.9 8
PubMed HSR Query precise 7 [3] 17.6 30.0 3