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Purpose: To evaluate the results of the Kurjak antenatal neurodevelopmental test (KANET) in multicentric studies. Materials and methods: In KANET, normal, borderline, and abnormal fetuses postnatal development was followed. The Chi-square was considered significant if p < 0.05 was used in the statistical analysis. Specificity, sensitivity, prevalence, positive and negative predictive value, false-positive, and false-negative results were calculated. Results: In 3,709 singleton fetuses, KANET was assessed. Postnatal follow-up was available for 1,556 of 1,573 (42.4%) infants. For 2,136, the data were not available. Interrater reliability (κ coefficient) for low-risk fetuses was between 0.64 and 0.65 (agreement 94.2–97.3%), for high-risk fetuses was between 0.44 and 0.53 (agreement 70.5–78.9%), respectively. Borderline KANET was found in 153 (9.7%), abnormal in 52 (3.3%), both more prevalent in high-risk pregnancies (χ2 = 457.36; df = 2; p < 0.01). Abnormal KANET was connected with severe postnatal developmental delay (χ2 = 315.28; df = 6; p < 0.01). In 47 out of 1,102 children aged 2 years and more, abnormal KANET was found, among them in one with CP. In 1 out of 1,055 children with normal KANET, severe developmental delay was found. The KANET has low sensitivity for detection of developmental delay and CP. The KANET specificity is high for all tested variables, positive predictive value and the false-positive rate are high, the negative predictive value is high (99.77–99.95%), and the false-negative rate is low (0.23–0.05%). Conclusion: With normal KANET, there is a high probability of normal infant development. If the KANET score is borderline or abnormal in high-risk pregnancies, postnatal development may appear abnormal.
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