Table 1.
Elastography values in kPa—summary.
| Elastography values (kPa) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Number of patients | Parotid gland | Submandibular gland | Mean parotid + submandibular | P value | |||||
| Mean | Median | St. dev. | Mean | Median | St. dev. | ||||
| Type of RT | |||||||||
| Primary RT | 9 | 46.2 | 23 | 41.1 | 39.5 | 43.5 | 23.3 | 42.8 | 0.58 |
| Adjuvant RT | 43 | 33.6 | 32 | 20.0 | 30.3 | 25 | 20.8 | 32.0 | |
| IMRT | 19 | 44.4 | 33.5 | 33.2 | 34.5 | 33.5 | 21.8 | 39.4 | 0.92 |
| Conventional | 33 | 40.2 | 41.5 | 23.6 | 39.4 | 30 | 30.1 | 39.8 | |
| Tumour localization | |||||||||
| Larynx | 40 | 39.7 | 34.5 | 25.0 | 38.5 | 31.0 | 29.4 | 39.1 | 0.81 |
| Oropharynx | 9 | 50.7 | 47.5 | 38.2 | 35.6 | 30.0 | 23.4 | 43.4 | |
| Maxilla | 3 | 41.1 | 39.5 | 16.8 | 30.2 | 25.5 | 18.6 | 35.6 | |
| RT fields | |||||||||
| Lateral | 37 | 43.3 | 41 | 26.8 | 36.8 | 34.0 | 21 | 40.2 | 0.73 |
| Only for primary | 15 | 37.7 | 35.5 | 17.3 | 38.8 | 35.5 | 24.9 | 38.2 | |
| Time from RT | |||||||||
| 0 | 5 | 45.8 | 17 | 51.0 | 22.6 | 16 | 18.0 | 34.2 | 0.56 |
| 6 | 7 | 43.5 | 39.5 | 27.6 | 29.8 | 30 | 15.4 | 36.6 | |
| 12 | 7 | 44.3 | 39.5 | 24.0 | 47.7 | 54 | 23.9 | 46.0 | |
| 24 | 33 | 40.17 | 41.5 | 23.7 | 39.4 | 30 | 30.1 | 39.7 | |
| RT group | 52 | 41.7 | 40.7 | 24.4 | 37.6 | 34.5 | 22 | 39.6 | 0.00 |
| Control group | 54 | 26.0 | 25.2 | 8.6 | 22.4 | 21 | 7.5 | 24.2 | |