| Value | Category | Cases | |
|---|---|---|---|
| 2 | Some difficulty | 51 | 
                                                                 
                                    
                                    98.1%
                                 
                                                             | 
                                                        
                    
| 3 | A lot of difficulty | 1 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    
| 4 | Cannot walk 500 m at all | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9 | No response | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 4277 |