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Table 2 Exclusion of manuscripts from the PubMed MEDLINE and CIG Trials Registry groups of manuscripts Manuscripts inappropriately identified by the PubMed MEDLINE search and the CIG trials registry were removed from review during a screening process performed by one of the authors of the current communication (CY).

From: Effects of the search technique on the measurement of the change in quality of randomized controlled trials over time in the field of brain injury

reason for exclusion PubMed MEDLINE search CIG Trials Registry group
INITIALLY IDENTIFIED 139 312
libraries unable to locate 0 15
unrelated to brain injury 2 3
duplicate publications 2 8
inaccurately claimed to be a controlled trial 22 47
inaccurately claimed to use randomization 11 30
abstracts / letters-to-the-editor 1 31
protocol descriptions 3 0
incomplete / preliminary reports 0 4
non-human subjects 0 1
TOTAL NUMBER DISCARDED 41 139
REMAINING 98 (70% of initially identified) 173 (55% of initially identified)