| Number of studies | OR | 95% CI | P for overall effect | I2 % |
---|---|---|---|---|---|
Studies with low risk of bias | 8 | 0.25 | 0.09 to 0.68 | 0.007 | 0 |
Levosimendan versus placebo | 9 | 0.66 | 0.11 to 4.08 | 0.65 | 35 |
Levosimendan versus phosphodiesterase | 4 | 0.23 | 0.08 to 0.65 | 0.003 | 0 |
Levosimendan versus dobutamine | 4 | 0.54 | 0.25 to 1.17 | 0.12 | 43 |