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