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Table 1 Sample demographics for participants with Down syndrome (DS), Williams syndrome (WS), and typically developing (TD) controls

From: Differences in age-related effects on brain volume in Down syndrome as compared to Williams syndrome and typical development

    

Group contrasts

DS (N = 14)

TD (N = 82)

WS (N = 41)

 

DS versus WS versus TD

 
 

N

%

 

N

%

 

N

%

   

χ2

P-value

  

Male sex

7

50

 

40

49

 

24

59

   

1.89

0.39

  
 

DS versus TD

WS versus TD

DS versus WS

 

Range

Mean

SD

Range

Mean

SD

Range

Mean

SD

t

P -value

t

P -value

t

P -value

Age (years)

19 to 63

39

13

18 to 90

36

18

16 to 58

26

8

0.61

0.54

-3.44

1.0E-03

4.31

7.1E-05

 

Range

Median

SD

            

DLD-SCS

0 to 21

0.5

8

            

DLD-SOS

0 to 18

5

5

            
  1. SD = standard deviation, N = number or count, % = percentage of subjects in the group corresponding to the preceding count, t = t-statistic, and χ2 = chi-square test of independence statistic.
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Journal of Neurodevelopmental Disorders

ISSN: 1866-1955

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