Benefit Expected from Restaging Patients to Decide Between Radiation (R) and Chemotherapy (C)
| Validity of change | Change | Impact on survival |
| Correct | R → C | + |
| Correct | C → R | + |
| Incorrect | R → C | − |
| Incorrect | C → R | − |
Data show effects of restaging: + = improvement; − = decrement.