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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.