| Value | Category | Cases | |
|---|---|---|---|
| -1 | day before conception (not pregnant) | 0 |
0%
|
| 0 | day of conception (pregnant) | 13502 |
0.4%
|
| 1 | pregnant | 30929 |
0.9%
|
| 2 | not pregnant | 57568 |
1.7%
|
| 6 | other | 0 |
0%
|
| 7 | refused | 0 |
0%
|
| 8 | don't know | 1382726 |
42%
|
| 9 | NIU (not in universe) | 1810345 |
54.9%
|
| 9999995 | missing:impute | 0 |
0%
|