Table 4.
Recurrence rates at 5 and 10 years by location among different stages.
| By T classification† | By N classification† | |||||
|---|---|---|---|---|---|---|
| Recurrence location | T1–2 | T3–4 | P# | N0–1 | N2–3 | P# |
| Any | <0.01 | <0.01 | ||||
| No. of recurrence | 41 | 127 | 109 | 59 | ||
| 5-year recurrence rate, % | 11.7 | 27.8 | 16.8 | 36.8 | ||
| 10-year recurrence rate, % | 13.1 | 30.2 | 18.8 | 38.2 | ||
| Nasopharynx | <0.01 | 0.023 | ||||
| No. of recurrence | 7 | 36 | 29 | 14 | ||
| 5-year recurrence rate, % | 1.6 | 7.9 | 4.2 | 9.2 | ||
| 10-year recurrence rate, % | 2.4 | 9.2 | 5.3 | 10.1 | ||
| Neck | 0.76 | 0.666 | ||||
| No. of recurrence | 9 | 13 | 17 | 5 | ||
| 5-year recurrence rate, % | 2.7 | 2.8 | 2.7 | 3 | ||
| 10-year recurrence rate, % | 3 | 4.5 | 3.1 | 4 | ||
| Bone | 0.03 | <0.01 | ||||
| No. of recurrence | 23 | 51 | 39 | 35 | ||
| 5-year recurrence rate, % | 6 | 12.1 | 6.1 | 22.2 | ||
| 10-year recurrence rate, % | 7.5 | 12.4 | 6.9 | 22.9 | ||
| Chest | <0.01 | 0.007 | ||||
| No. of recurrence | 8 | 38 | 30 | 16 | ||
| 5-year recurrence rate, % | 2.3 | 8.9 | 5 | 10.4 | ||
| 10-year recurrence rate, % | 2.7 | 9.6 | 5.3 | 11.4 | ||
| Abdomen | 0.01 | 0.002 | ||||
| No. of recurrence | 15 | 41 | 36 | 20 | ||
| 5-year recurrence rate, % | 4.5 | 10 | 6.1 | 13.6 | ||
| 10-year recurrence rate, % | 4.9 | 10 | 6.3 | 13.6 | ||
| Other | 0.07 | 0.166 | ||||
| No. of recurrence | 1 | 7 | 5 | 3 | ||
| 5-year recurrence rate, % | 0.3 | 1 | 0.7 | 0.8 | ||
| 10-year recurrence rate, % | 0.3 | 2 | 0.9 | 2.6 | ||
†
According to the 7th Union for International Cancer Control/American Joint Committee on Cancer staging system.
#
P-values calculated using the Kaplan–Meier method.