| Value | Category | 
                                    
                    
                        | 0 | Measured | 
                                    
                    
                        | 3 | Not present | 
                                    
                    
                        | 4 | Refused | 
                                    
                    
                        | 5 | Technical problems | 
                                    
                    
                        | 6 | Other | 
                                    
                    
                        | 7 | No measurement found in HH | 
                            
            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.