| Posterior SCC (%) | Lateral SCC (%) | Bilateral lateral SCCs (%) | Bilateral posterior SCCs (%) | Posterior + lateral SCCs (%) | |
Group A (TRV) | young | 10 | - | - | - | 90 |
old | 50 | 10 | 20 | - | 20 | |
Group B (CRP) | young | 43 | 14 | - | 14 | 28 |
old | 70 | 10 | 10 | 10 | - |