Table 4 Clinical features at diagnosis for low risk patients who received level Ib-sparing and -covering IMRT
Variable | Irradiation of level Ib, N (%) | P * | |
|---|---|---|---|
(−), n = 722 | (+), n = 182 | ||
Sex | |||
Male | 536 (74.2) | 122 (67.0) | .051 |
Female | 186 (25.8) | 60 (33.0) | |
Age | |||
<50 years | 447 (66.1) | 139 (76.4) | .008 |
≧50 years | 245 (33.9) | 43 (23.6) | |
T classification | |||
T1 | 157 (21.7) | 36 (19.8) | .208 |
T2 | 108 (15.0) | 38 (20.9) | |
T3 | 332 (46.0) | 83 (45.6) | |
T4 | 125 (17.3) | 25 (13.7) | |
N classification | |||
N0 | 206 (28.5) | 21 (11.5) | <.001 |
N1 | 493 (68.7) | 137 (75.3) | |
N3 | 20 (2.8) | 24 (13.2) | |
Positive RLNs | |||
(−) | 256 (35.5) | 45 (24.7) | .006 |
(+) | 466 (64.5) | 137 (75.3) | |
Positive CLNs | |||
(−) | 479 (66.3) | 60 (33.0) | <.001 |
(+) | 243 (33.7) | 122 (67.0) | |
Positive CLNs at supraclavicular fossa | |||
(−) | 710 (98.3) | 168 (92.3) | <.001 |
(+) | 12 (1.7) | 14 (7.7) | |
Chemotherapy | |||
(−) | 147 (20.4) | 15 (8.2) | <.001 |
(+) | 575 (79.6) | 167 (20.1) | |