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Table 1 Summary of quality indicators and validity assessment of randomised trials fulfilling inclusion criteria

From: A comparison of early versus late initiation of renal replacement therapy in critically ill patients with acute kidney injury: a systematic review and meta-analysis

Randomised control trials Bouman [10] Sugahara [32]
Was the study described as randomised? Yes Yes
Was the method used to randomise described and appropriate (table of random numbers, computer generated, and so on)? Yes No
Was there a description of withdrawals and dropouts? Yes Yes
Was there intention to treat analysis? Yes No
Were control and intervention group comparable with respect to disease type and demographics? Yes No
Were the control and intervention groups comparable with respect to disease severity? Yes Yes
Was dialysis type comparable between groups in terms of dose, solution used, filtration vs dialysis, and type of membrane? Yes Yes