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Table 2 Developmental Testing Scores at baseline, 6 months and at 12 months

From: A placebo-controlled trial of folic acid and betaine in identical twins with Angelman syndrome

Variables (Raw Scores) at 0, 6 and 12 months

TWIN

0

6

12

cScore 6-0

cScore 12-6

c Total Score

Bayley Mental

Aa

76

83

90

7

7

14

Bb

77

78

78

1

0

1

Ca

70

77

78

7

1

8

Db

73

73

76

0

3

3

Bayley Motor

A

66

67

74

1

7

8

B

66

67

73

1

6

7

C

38

41

44

2

3

5

D

51

50

47

-1

−3

−4

Preschool Language Auditory Comprehension

A

8

9

9

1

0

1

B

8

8

9

0

1

1

C

5

7

6

2

−1

1

D

5

5

7

0

2

2

Preschool Language Expressive Communication

A

6

9

9

3

0

3

B

5

9

8

4

−1

3

C

6

6

6

0

0

0

D

4

3

3

−1

0

−1

Preschool Language Composite

A

14

18

18

4

0

4

B

13

17

17

4

0

4

C

11

13

12

2

−1

1

D

9

8

10

−1

2

1

*Vineland Communication

A

24

24

26

0

2

2

B

24

23

25

−1

2

1

C

12

14

16

2

2

4

D

14

15

14

1

−1

0

*Vineland Daily Living

A

31

31

35

0

4

4

B

29

27

33

−2

6

4

C

7

6

6

−1

0

−1

D

8

9

8

1

− 1

0

*Vineland Socialization

A

29

33

33

4

0

4

B

27

29

33

2

4

6

C

25

30

30

5

0

5

D

23

26

17

3

−9

−6

*Vineland Adaptive Behavior Composite

A

164

117

131

−47

14

−33

B

80

105

127

25

22

47

C

139

131

106

−8

−25

−33

D

145

136

123

−9

−13

− 22

*Vineland Adaptive Behavior Composite (standard scores)

A

29

28

27

−1

−1

−2

B

29

26

−3

C

32

30

32

−2

2

0

D

33

42

28

9

−14

−5

MacArthur Communicative Developmental Inventory Phrases understood

A

25

25

16

0

−9

−9

B

19

22

15

3

−7

−4

C

2

0

0

−2

0

−2

D

0

0

2

0

2

2

MacArthur Communicative Developmental Inventory Vocabulary comprehension

A

1

3

0

2

−3

−1

B

1

2

0

1

−2

−1

C

1

0

5

− 1

5

4

D

3

2

8

−1

6

5

MacArthur Communicative Developmental Inventory production

A

0

0

1

0

1

1

B

0

2

0

2

−2

0

C

1

0

1

−1

1

0

D

0

0

0

0

0

0

  1. * Vineland did not include the motor skills portion because the twins were over age 6 years
  2. The labels a for placebo, and the label b for drug (betaine and folic acid) treatment applies to all the testing groups. c refers to differences in the scores between baseline, 6 months and 12 months
  3. P-values calculated through t-test were not statistically significant