| Value | Category | 
                                    
                    
                        | 1 | Chlorine bleach | 
                                    
                    
                        | 2 | Other disinfectant | 
                                    
                    
                        | 3 | Autoclave or other mechanical sterilizer | 
                                    
                    
                        | 4 | Boil | 
                                    
                    
                        | 5 | Bake | 
                                    
                    
                        | 7 | Water only | 
                                    
                    
                        | 9 | Other | 
                                    
                    
                        | 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.