2. Separating indirect from direct evidence: length of intensive care stay.

Treatment comparison	Proportion of direct evidence	RoR	P value
Dobutamine versus levosimendan	0.63	1.1501	0.7322
Dobutamine versus milrinone	0.49	0.8695	0.7322
Dobutamine versus placebo, only indirect evidence	0	NA	NA
Levosimendan versus milrinone	0.76	1.2063	0.5537
Levosimendan versus placebo	0.72	0.8302	0.6611
Milrinone versus placebo	0.39	1.2046	0.6611

Separation of indirect from direct evidence using a back‐calculation method, random‐effects model
RoR: ratio of ratios (direct/indirect), with P value of test for disagreement

Abbreviations
NA: not applicable; RoR: ratio of ratios