| Value | Category | Cases | |
|---|---|---|---|
| -8 | Refusal (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 1 | Male | 134 | 
                                    
                                    68.7%
                                 | 
| 2 | Female | 61 | 
                                    
                                    31.3%
                                 | 
| Sysmiss | 150 |