| Value | Category | 
                                    
                    
                        | 1 | yes, full-time (sometimes spends the night) | 
                                    
                    
                        | 2 | yes, full-time (doesnot spend the night) | 
                                    
                    
                        | 3 | yes, part-time | 
                                    
                    
                        | 4 | no | 
                            
            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.