|
Head circumference
|
|
Age
|
Autism
|
Control
|
Autism-control
|
t value
|
p value
|
|
Birth
|
34.4
|
35
|
−0.6
|
−2.1
|
0.04*
|
|
3 months
|
39.7
|
40.2
|
−0.5
|
−2.8
|
0.006*
|
|
6 months
|
42.8
|
43.2
|
−0.4
|
−1.7
|
0.1
|
|
9 months
|
44.7
|
44.9
|
−0.2
|
−1.3
|
0.19
|
|
12 months
|
45.9
|
46.2
|
−0.3
|
−1.3
|
0.21
|
|
15 months
|
46.7
|
47.1
|
−0.4
|
−1.7
|
0.1
|
|
18 months
|
47.2
|
47.7
|
−0.5
|
−1.9
|
0.06
|
|
21 months
|
47.7
|
48.3
|
−0.6
|
−1.4
|
0.17
|
|
24 months
|
48.1
|
49.1
|
−1
|
−1.8
|
0.12
|
|
Weight
|
|
Age
|
Autism
|
Control
|
Autism-control
|
t value
|
p value
|
|
Birth
|
3.2
|
3.4
|
−0.2
|
−2.7
|
0.007*
|
|
3 months
|
5.6
|
6.1
|
−0.5
|
−3.8
|
0.0004*
|
|
6 months
|
7.6
|
7.9
|
−0.3
|
−1.9
|
0.06
|
|
9 months
|
8.7
|
9
|
−0.3
|
−1.4
|
0.1
|
|
12 months
|
9.7
|
9.9
|
−0.2
|
−1.2
|
0.24
|
|
15 months
|
10.4
|
10.6
|
−0.2
|
−0.9
|
0.36
|
|
18 months
|
11.1
|
11.3
|
−0.2
|
−1
|
0.31
|
|
21 months
|
11.7
|
12
|
−0.3
|
−1.1
|
0.28
|
|
24 months
|
12.3
|
12.5
|
−0.2
|
−1
|
0.31
|
|
Height
|
|
Age
|
Autism
|
Control
|
Autism-control
|
t value
|
p value
|
|
3 months
|
59.4
|
60
|
−0.6
|
−1.9
|
0.06
|
|
6 months
|
66.9
|
67.3
|
−0.4
|
−1.2
|
0.24
|
|
9 months
|
71.5
|
71.8
|
−0.3
|
−1.4
|
0.58
|
|
12 months
|
75.5
|
75.3
|
0.2
|
−1.2
|
0.73
|
|
15 months
|
78.8
|
78.5
|
0.3
|
−0.9
|
0.53
|
|
18 months
|
81.7
|
81.5
|
0.2
|
−1
|
0.72
|
|
21 months
|
84.5
|
84.2
|
0.3
|
−1.1
|
0.63
|
|
24 months
|
87
|
86.7
|
0.3
|
−1
|
0.67
|
- HC and height are in centimeters and weight is in kilograms. Columns: mean of the autism group, mean of the control group, the difference between autism and control groups, t values, and p values from a two-tailed two-sample t test with unequal variance. p values are not corrected to increase sensitivity
- Asterisks: p value < 0.05
