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. 2016 Oct 31;2016(10):CD010683. doi: 10.1002/14651858.CD010683.pub3

9.

9

Cardiopulmonary intervention: blood loss

Forest plot of the comparisons in which direct and indirect estimates were available. There does not appear to be any discrepancy between the direct and indirect estimates, although the indirect estimates have wide credible intervals.

Direct evidence appears to be preferable over indirect evidence and network meta‐analysis based on the quality of evidence.

ANH: acute normovolemic haemodilution; CVP: central venous pressure.

1Risk of bias was unclear or high in the trial(s) (downgraded by 1 point).
 2Sample size was low (downgraded by 1 point).
 3Confidence intervals spanned no effect and clinically significant effect (downgraded by 1 point).
 4There was substantial or considerable heterogeneity (downgraded by 2 points).