| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not twin | 2660 |
96.4%
|
| 1 | Twin | 96 |
3.5%
|
| 2 | Second child but not twin | 0 |
0%
|
| 3 | One twin remaining in the study | 0 |
0%
|
| 4 | One child remaining | 0 |
0%
|
| 5 | miss | 2 |
0.1%
|