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Table 4 Indirect Subgroup Analyses: Precision

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

Subgroups   MEDLINE vs. Handsearching MEDLINE vs. MEDLINE + Handsearching MEDLINE vs. Reference Standard
   N Median (Range) N Median (Range) N Median (Range)
Search Strategy Cochrane 7 9 (0.03,76) 3 48 (13,49) 3 7 (1,7)
  Complex 12 38 (22,78) 3 51 (13,59) 9 35 (3,91)
  Simple 4 76 (68,99) 2 (40,83) 5 23 (1,65)
Author Cochrane 7 9 (0.03,76) 3 48 (13,49) 3 7 (1,7)
  Librarian 1 34 0 -- 2 (53,72)
  Non-librarian 15 50 (22,99) 5 51 (13,83) 12 29 (1,91)
Design RCT 12 43 (22,79) 0 -- 7 7 (1,91)
  CCT 11 28 (0.03,99) 8 49 (13,83) 10 33 (7,72)