| Value | Category | 
                                    
                    
                        | 1 | Substantially better | 
                                    
                    
                        | 2 | A little better | 
                                    
                    
                        | 3 | Same | 
                                    
                    
                        | 4 | A little worse | 
                                    
                    
                        | 5 | Substantially worse | 
                                    
                    
                        | 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.