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Table 4 SCQ subscale/total score medians and interquartile ranges, calculated with and without verbal items

From: Prospective study of autism phenomenology and the behavioural phenotype of Phelan–McDermid syndrome: comparison to fragile X syndrome, Down syndrome and idiopathic autism spectrum disorder

Domain

Median scores all items (interquartile range)

Kruskal–Wallis test

Post hoc < .01

PMS

FraX

DS

Idiopathic ASD

df

k

p valuea

 

Communication (verbal items removed)

7.00

(4.00–7.00)

4.00

(3.00–5.80)

1.00

(0.00–4.00)

6.00

(4.00–7.00)

3

29.97

< .001

ASD, PMS > DS

Repetitive Behaviour (verbal items removed)

4.00

(2.75–5.00)

5.00

(3.00–6.00)

1.00

(0.00–4.00)

5.50

(4.00–7.00)

3

32.72

< .001

ASD, FraX > DS

Reciprocal Social Interaction

10.00

(7.75–13.00)

9.00

(6.00–11.00)

3.00

(1.00–8.00)

11.25

(9.00–13.00)

3

28.04

< .001

ASD, PMS > DS

Total score (verbal items removed)

21.50

(18.75–25.00)

18.50

(12.00–23.25)

5.00

(2.00–12.50)

23.40

(19.00–27.00)

3

35.66

< .001

ASD, PMS > DS

  1. aSignificant differences (p < .01) are indicated in italics