OBJECTIVE: To verify the predictive value of two tests (neurological assessment and ultrasonography) performed at the time of discharge, with respect to the neuromotor and cognitive development of premature infants. METHODS: Seventy very low birth weight premature infants (below 1,500g), admitted to the Neonatal Department between 1992 and 1994 were studied. The average birth weight and gestation age were, respectively, 1,185g (SD:180g) and 32.2 weeks (SD: 1.4). At the term correct age, neurological assessment by the Dubowitz & Dubowitz method and cerebral ultrasonography were carried out. After discharge, the development was monitored at the follow up clinic. RESULTS: At 21 months correct age (SD: 4.9), neuromotor and cognitive abnormalities were observed, respectively, in 25.7% and 20.3% of the infants evaluated. The neonatal neurological assessment was found to be more sensitive than those specific for neuromotor (sensibility:77.7%, specificity:57.6%) and cognitive (sensibility:78.5%, specificity:56.4%) abnormalities, and exhibited low predictive value for both neuromotor and cognitive abnormality. Ultrasonography exhibited high specificity with respect to both neuromotor and cognitive development. The cerebral ultrasonography has also a reasonable predictive value for neuromotor abnormality. CONCLUSION: The combination of both tests yielded higher predictive values.
Infant; Infant; Neurologic examination; Cognitive symptons