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Table 4 Mean and median Cochrane score for all items compared with Levels of Evidence

From: Does a "Level I Evidence" rating imply high quality of reporting in orthopaedic randomised controlled trials?

Cochrane score (max = 2 points for each A-L)
Level JBJS A B C D E F G H I J K L
% with score = 2 38% 22% 41% 72% 19% 6% 53% 78% 97% 97% 69% 31%
Mean Level I-1a 1.3 0.8 0.7 1.7 0.4 0.1 1.3 1.7 2.0 2.0 1.7 1.3
Median Level I-1a 1.0 1.0 0.0 2.0 0.0 0.0 1.5 2.0 2.0 2.0 2.0 1.0
Mean Level I-1b 1.0 1.0 1.7 1.4 0.6 0.3 1.4 1.9 2.0 2.0 1.7 1.1
Median Level I-1b 1.0 1.0 2.0 2.0 0.0 0.0 2.0 2.0 2.0 2.0 2.0 1.0
Mean Level II 1.0 0.7 0.0 0.7 0.0 0.0 0.7 2.0 2.0 1.7 1.7 1.3
Median level II 1.0 1.0 0.0 0.0 0.0 0.0 0.0 2.0 2.0 2.0 2.0 1.0
ANOVA (p value)* NS NS NS NS NS NS NS NS NS NS NS NS
Correlation (-) 0.04 0.2 0.1 0.2 0.1 0.2 0.0 0.3 0.1 0.2 0.03 0.1
  1. p values corrected for post hoc comparisons (Bonferroni), NS = non-significant p value (P > 0.05)