| Value | Category | Cases | |
|---|---|---|---|
| 1 | cramp | 33 |
0.5%
|
| 2 | dull ache | 49 |
0.8%
|
| 3 | burning pain | 70 |
1.1%
|
| 6 | other | 8 |
0.1%
|
| 7 | refused | 0 |
0%
|
| 8 | don't know | 60 |
1%
|
| 9 | NIU (not in universe) | 4725 |
76%
|
| 9999995 | missing:impute | 1273 |
20.5%
|