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Table 1 Results

From: Which resources should be used to identify RCT/CCTs for systematic reviews: a systematic review

Comparison Recall Precision
  Number of Studies Number of Comparisons Median (Range) Number of Studies Number of Comparisons Median (Range)
MEDLINE vs. Handsearching 23 41 22* 53 (7,97) 58 (7,97) 12 23 11 35 (0.03,99) 31 (0.03,78)
MEDLINE vs. MEDLINE + Handsearching 13 16 12* 70 (18,90) 75 (18,90) 6 8 5 49 (13,83) 40 (13,83)
MEDLINE vs. Reference Standard 13 24 18* 59 (17,98) 58 (17,98) 8 17 11 27 (1,91) 30 (1,91)
EMBASE vs. Handsearching 2 2 (42,88) 2 2 (9,17)
EMBASE vs. Reference Standard 9 14 13* 72 (13,100) 68 (13,100) 5 8 7 28 (0,48) 26 (0,48)
PsycINFO vs. Handsearching 2 2 (68,70) 2 2 (8,9)
PsycINFO vs. Reference Standard 2 4 2* 50 (0,65) (38,61) 2 3 2 39 (36,47) (36,47)
Trial Registries vs. Reference Standard 2 4 89 (84,95) 1 2 (96,97)
CINAHL vs. Reference Standard 2 2 (0,1) 1 1 0
Biosis vs. Reference Standard 1 1 47 1 1 1
CancerLIT vs. Handsearching 1 1 92 0 -- --
Cabnar vs. Reference Standard 1 1 47 1 1 2
CENTRAL vs. Reference Standard 1 1 78 0 -- --
Chirolars vs. Reference Standard 1 1 49 0 -- --
HealthStar vs. Reference Standard 1 1 53 1 1 1
Internet vs. Reference Standard 1 1 24 1 1 17
SciCitIndex vs. Reference Standard 1 1 61 0 -- --
  1. * excludes duplicate topics
  2. excludes Index searches