Increase in size the residual mass | The residual mass unchanged | Reduction of the size of residual mass | Complete disappearance of residual mass |
| ||||||||
female | male | total | female | male | total | female | male | total | female | male | total | |
6 | 2 | 8 | 13 | 0 | 13 | 2 | 9 | 11 | 0 | 0 | 0 | After 6 months |
6 | 2 | 8 | 7 | 0 | 7 | 8 | 9 | 17 | 0 | 0 | 0 | After 1 year |
9 | 2 | 11 | 4 | 0 | 4 | 8 | 2 | 10 | 0 | 7 | 7 | After 2 years |