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  • Title: Neurodevelopmental outcome of extremely low birth weight infants at 24 months corrected age: a comparison between Griffiths and Bayley Scales.
    Author: Picciolini O, Squarza C, Fontana C, Giannì ML, Cortinovis I, Gangi S, Gardon L, Presezzi G, Fumagalli M, Mosca F.
    Journal: BMC Pediatr; 2015 Sep 30; 15():139. PubMed ID: 26419231.
    Abstract:
    BACKGROUND: The availability of accurate assessment tools for the early detection of infants at risk for adverse neurodevelopmental outcomes is a major issue. The purpose of this study is to compare the outcomes of the Bayley Scales (Bayley-II vs Bayley-III) in a cohort of extremely low birth weight infants at 24 months corrected age, to define which edition shows the highest agreement with the Griffiths Mental Development Scales Revised. METHODS: We performed a single-centre cohort study. We prospectively enrolled infants with a birth weight of 401-1000 g and/or gestational age < 28 weeks. Exclusion criteria were the presence of neurosensory disabilities and/or genetic abnormalities. Infants underwent neurodevelopmental evaluation at 24 months corrected age using the Griffiths and either the Bayley-II (birth years 2003-2006) or the Bayley-III (birth years 2007-2010). RESULTS: A total of 194 infants were enrolled. Concordance was excellent between the Griffiths and the Bayley-III composite scores for both cognitive language and motor abilities (weighted K = 0.80 and 0.81, respectively) but poorer for the Bayley-II (weighted K = 0.63 and 0.50, respectively). The Youden's Index revealed higher values for the Bayley-III than for the Bayley-II (75.9 vs 69.6%). Compared with the Griffiths, the Bayley-III found 3% fewer infants as being severely impaired in cognitive-language abilities and 7.8% fewer infants as being mildly impaired in motor skills while the Bayley-II showed, compared with the Griffiths, higher rates of severely impaired children both for cognitive-language and motor abilities (14.1 and 15.3% more infants respectively). DISCUSSION: Our study suggests that the Bayley-III, although having a higher agreement with the Griffiths compared to the Bayley-II, slightly tends to underestimate neurodevelopmental impairment compared with the Griffiths, whereas the Bayley-II tends to overestimate it. CONCLUSIONS: On the basis of these findings, we recommend the use of multiple measures to assess neurodevelopmental outcomes of extremely low birth weight infants at 24 months.
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