| Value | Category | 
                                    
                    
                        | 1 | VERY MUCH IMPROVED | 
                                    
                    
                        | 2 | IMPROVED A BIT | 
                                    
                    
                        | 3 | NO CHANGE | 
                                    
                    
                        | 4 | WORSENED A BIT | 
                                    
                    
                        | 5 | VERY MUCH WORSE | 
                                    
                    
                        | 6 | I CAN’T ESTIMATE | 
                                    
                    
                        | Sysmiss |  | 
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.