| HTP | Heated tobacco product |
| QoL | Quality of life |
| DMFT | Decayed, Missing, Filled Teeth |
| UWS | Unstimulated whole saliva |
| SWS | Stimulated whole saliva |
| WHO | World Health Organization |
| OPMD | Oral potentially malignant disorder |
| OLL | Oral lichenoid lesion |
| DM | Diabetes mellitus |
| PPI | Proton pump inhibitors |
| OHIP-CRO14 | Croatian version of the Oral Health Impact Profile |
| ANOVA | Analysis of variance |
| SD | Standard deviation |
| IQR | Interquartile range |
| N | Number |
| OHRQoL | Oral Health-Related Quality of Life |