Table 1.
Cohorts for model development and validation with respective grade (WHO, 2017) breakdown and clinical outcomes.
| N | Transformation | Recurrence | |
|---|---|---|---|
| DEVELOPMENT COHORT | |||
| School of Clinical Dentistry, Sheffield, UK | |||
| Mild | 25 | 1 (1%) | 2 (3%) |
| Moderate | 25 | 9 (12% | 11 (15%) |
| Severe | 25 | 9 (12%) | 13 (17%) |
| Total | 75 | 19 (25%) | 26 (35%) |
| Overall Total | 75 | ||
| VALIDATION COHORT | |||
|---|---|---|---|
| School of Clinical Dentistry, Sheffield, UK | |||
| Mild | 4 | 0 (0%) | 0 (0%) |
| Moderate | 6 | 2 (13%) | 2 (13%) |
| Severe | 5 | 3 (20%) | 2 (13%) |
| Total | 15 | 5 (33%) | 4 (27%) |
| Piracicaba Dental School, UNICAMP, Brazil | |||
| Mild | 8 | 2 (11%) | 1 (5%) |
| Moderate | 7 | 1 (5%) | 1 (5%) |
| Severe | 4 | 1 (5%) | 1 (5%) |
| Total | 19 | 4 (21%) | 3 (15%) |
| Queen’s University Belfast, UK | |||
| Mild | 1 | 1 (2%) | Not recorded |
| Moderate | 16 | 10 (22%) | |
| Severe | 28 | 14 (31%) | |
| Total | 45 | 25 (55%) | |
| Institute of Head and Neck Studies and Education (InHANSE), Birmingham, UK | |||
| Mild | 20 | 0 (0%) | Not recorded |
| Moderate | 14 | 3 (7%) | |
| Severe | 8 | 2 (5%) | |
| Total | 42 | 5 (12%) | |
| Overall Total | 121 | ||
The total number in the development and validation cohort are in bold.