Table 2 Total number of head circumference measurements incorporated in the study, as a function of subject group and age at the time of measurement
From: Infant head growth in male siblings of children with and without autism spectrum disorders
Month | Index ASD subjects | Sibs of ASD subject | Control sib 1 | Control sib 2 |
|---|---|---|---|---|
Birth | 18 | 24 | 43 | 55 |
1 | 24 | 24 | 52 | 47 |
2 | 35 | 37 | 78 | 79 |
4 | 34 | 36 | 77 | 78 |
6 | 38 | 39 | 77 | 72 |
9 | 32 | 24 | 32 | 40 |
10 | 8 | 14 | 28 | 13 |
12 | 33 | 32 | 57 | 68 |
15 | 21 | 27 | 67 | 51 |
18 | 15 | 11 | 60 | 38 |
21 | 0 | 3 | 11 | 7 |
24 | 19 | 16 | 43 | 38 |
27 | 0 | 0 | 3 | 8 |
30 | 0 | 1 | 1 | 4 |
36 | 1 | 0 | 1 | 0 |