| Value | Category | Cases | |
|---|---|---|---|
| 0 | no: received treatm. | 137 | 
                                                                 
                                    
                                    31.9%
                                 
                                                             | 
                                                        
                    
| 1 | yes: no treatment | 290 | 
                                                                 
                                    
                                    67.4%
                                 
                                                             | 
                                                        
                    
| 8 | dk | 3 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 6325 |