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Table 4 Characteristics of malformations

From: False positive morphologic diagnoses at the anomaly scan: marginal or real problem, a population-based cohort study

  Total cohort False positive Misclassification True positive p1
  (n = 526) (n = 39) (n = 49) (n = 438)
  % [m ± SD] % [m ± SD] % [m ± SD] % [m ± SD]
Term at prenatal diagnosis or malformation (weeks): (n = 526) [26.9 ± 4.9] (n = 39) [27.2 ± 5.2] (n = 49) [26.1 ± 4.8] (n = 438) [26.9 ± 4.9] 0.45
 20-25 50.9 46.8 58.6 50.0 0.92
 26-29 13.1 10.6 20.7 13.5  
 30-35 32.4 38.3 20.7 33.1  
 >35 3.6 4.3 0 3.4  
Number of malformations (n = 526) (n = 39) (n = 49) (n = 438)  
 1 51.7 93.6 6.1 52.3 0.0001
 2 21.9 4.3 32.7 22.6  
 3 13.7 2.1 22.5 13.9  
 ≥ 4 12.7 0 38.8 11.2  
Number of anatomical systems affected (n = 526) (n = 39) (n = 49) (n = 438)  
 1 71.9 100 48.9 71.9 0.0001
 2 13.5 0 20.4 13.9  
 3 6.7 0 6.1 7.3  
 ≥ 4 7.9 0 24.5 6.9  
  1. 1Comparison of 3 groups: False positives, Misclassifications, True positives.