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  • Title: Predictive value of Bayley-III Motor Index for later motor difficulties in children born extremely preterm.
    Author: Montgomery C, Setänen S, Kaul YF, Farooqi A, Broström L, Aden U, Källén K, Serenius F.
    Journal: Acta Paediatr; 2023 Apr; 112(4):742-752. PubMed ID: 36723223.
    Abstract:
    AIM: To investigate the predictive ability of the Bayley Scales of Infant and Toddler Development, Third Edition (Bayley-III) Motor Index, in children born extremely preterm (<27 gestational weeks) without cerebral palsy. METHODS: Children from the EXPRESS study (all extremely preterm births in Sweden, 2004-2007) without neurosensory impairments assessed with Bayley-III at 2.5 years corrected age and Movement Assessment Battery for Children, Second Edition (MABC-2), at 6.5 years comprised the eligible study population (n = 282). Motor difficulty was defined as MABC-2 ≤5th percentile. RESULTS: Motor difficulties were found in 57 of 282 children (20.2%) at 6.5 years. The Bayley-III explained 18.0% of the variance in the MABC-2 (p < 0.001). The area under the receiver operating curve was 0.71 (95% confidence interval 0.64-0.79, p < 0.001). At a Bayley-III cut-off value of 85, sensitivity, specificity and positive and negative predictive values for motor difficulties were 26.3% (15.5-39.7), 92.9% (88.1-95.9), 48.4% (33.0-64.0) and 83.3% (80.9-85.4). Likelihood ratios were inconclusive. CONCLUSION: The Bayley-III at 2.5 years corrected age was a modest predictor of motor outcome in children born extremely preterm at 6.5 years, and underestimated the rate of motor difficulties. Children require follow-up beyond preschool age.
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