Table 4.
Survival outcomes for the patients with stage II NPC in different treatment methods
| Survival rate (95% CI, %) |
||
|---|---|---|
| RT alone | RT+chemotherapy | |
| OS (yr) | ||
| 3 | 91.3 (90.3-92.3) | 94.5 (92.9-96.1) |
| 5 | 83.6 (82.2-85.0) | 88.9 (86.5-91.3) |
| 7 | 76.6 (75.0-78.2) | 82.3 (79.0-85.6) |
| 10 | 67.3 (65.3-69.3) | 73.0 (68.1-77.9) |
| 15 | 53.3 (50.8-55.8) | 63.4 (56.9-69.9) |
| 20 | 42.4 (39.1-45.7) | 55.3 (47.3-63.3) |
| PFS (yr) | ||
| 3 | 83.5 (82.1-84.9) | 87.2 (84.8-89.6) |
| 5 | 75.7 (74.1-77.3) | 82.0 (79.1-84.9) |
| 7 | 69.2 (67.4-71.0) | 76.0 (72.5-79.5) |
| 10 | 61.6 (59.6-63.6) | 68.7 (64.0-73.4) |
| 15 | 50.5 (48.1-52.9) | 58.7 (52.0-65.4) |
| 20 | 40.0 (36.7-43.3) | 51.9 (44-1-59.7) |
| LRFS (yr) | ||
| 3 | 88.7 (87.5-89.9) | 92.2 (90.2-94.2) |
| 5 | 82.9 (81.5-84.3) | 89.4 (87.0-91.8) |
| 7 | 78.4 (76.8-80.0) | 85.6 (82.7-88.5) |
| 10 | 74.0 (72.2-75.8) | 82.1 (78.2-86.0) |
| 15 | 69.9 (67.7-72.1) | 77.0 (71.3-82.7) |
| 20 | 67.7 (65.0-70.4) | 77.0 (71.3-82.7) |
| DMFS (yr) | ||
| 3 | 95.3 (94.5-96.1) | 94.7 (93.1-96.3) |
| 5 | 93.4 (92.4-94.4) | 92.7 (90.7-94.7) |
| 7 | 91.7 (90.5-92.9) | 91.5 (89.3-93.7) |
| 10 | 90.7 (89.5-91.9) | 91.0 (88.6-93.4) |
| 15 | 89.7 (88.3-91.1) | 88.9 (84.2-93.6) |
| 20 | 88.1 (85.9-90.3) | 88.9 (84.2-93.6) |
NPC, nasopharyngeal carcinoma; CI, confidence interval; RT, radiotherapy; OS, overall survival; PFS, progression-free survival; LRFS, locoregional relapse–free survival; DMFS, distant metastasis–free survival.