| Value | Category | Cases | |
|---|---|---|---|
| 1 | More comfortable | 678 | 
                                                                 
                                    
                                    20%
                                 
                                                             | 
                                                        
                    
| 2 | Less comfortable | 1572 | 
                                                                 
                                    
                                    46.4%
                                 
                                                             | 
                                                        
                    
| 3 | No difference from non-smokers | 1140 | 
                                                                 
                                    
                                    33.6%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 68 |