| Value | Category | 
                                    
                    
                        | 1 | During her period | 
                                    
                    
                        | 2 | After period ended | 
                                    
                    
                        | 3 | Middle of the cycle | 
                                    
                    
                        | 4 | Before period begins | 
                                    
                    
                        | 5 | At any time | 
                                    
                    
                        | 6 | Other | 
                                    
                    
                        | 8 | Don't know | 
                                    
                    
                        | 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.