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Table 4 Jadad scoring items and allocation concealment of each study eligible for meta-analysis

From: Exogenous pulmonary surfactant for the treatment of adult patients with acute respiratory distress syndrome: results of a meta-analysis

  Weg and colleagues, 1994 [16] Anzueto and colleagues, 1996 [17] Gregory and colleagues, 1997 [18] Spragg and colleagues, 2003 [19] Spragg and colleagues, 2004 [20]
Jadad scoring items      
Was the study randomized? Yes Yes Yes Yes Yes
Was the randomization method described and appropriate? Yes Yes No Yes No
Was the study described as double-blind? Yes Yes No No Yes
Was the method of blinding described and appropriate Yes Yes No No Yes
Was there a description of withdrawals and dropouts? Yes Yes Yes No Yes
Inappropriate method of randomization? No No No No No
Inappropriate method of blinding? No No No No No
Allocation concealment Central office provided randomization assignment to study sites Independent central facility provided randomization assignment to study sites Not clearly stated Centralized facility provided randomization assignment to study sites Not clearly stated