Table 1.

Dopamine versus Dobutamine in preterm infants with cardiovascular instability.

Author	Number of Patients	Gestation/Wt	Definition
Roze	20	<32 weeks	>30 mmHg
Klarr	63	<34 weeks	>30 mmHg
Greenough	40	<33 weeks	Systolic < 40 mmHg
Hentschel	20	25–36 weeks	Not stated
Chatterjee	20	<32 weeks	Not stated
Ruelas-orozco	63	1.0–1.5 Kg	<30 mmHg
Fillipi	35	<0.75, <1.0, <1.5 Kg	<25, <30, <32 mmHg
Osborn	40	<30 weeks	Low flow