[Retracted] Profound Effect of Pulmonary Surfactant on the Treatment of Preterm Infants with Respiratory Distress Syndrome

Table 5

Comparison of clinical efficacy of three groups of children.

Group	Healing	Significantly effective	Effective	Invalid
Control group (number of cases)	6	9	6	8
Early stage group (number of cases)	17	8	4	1
Late group (number of cases)	17	7	4	2