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. 2015 Oct 31;142(3):659–667. doi: 10.1007/s00432-015-2069-0

Table 3.

Univariate analysis for baseline characteristics and treatment factors

Factor Level No. Overall survival Progression-free survival Local control Regional control of neck
HRa 95 % CIb P value HR 95 % CI P value HR 95 % CI P value HR 95 % CI P value
Age <53 15 1 0.416 1 0.568 1 0.869 1 0.202
≥53 18 2.480 (0.258, 23.852) 1.524 (0.364, 6.387) 0.848 (0.119, 6.021) 3.788 (0.423, 33.948)
Sex Male 22 1 0.746 1 0.623 1 0.730 1 0.515
Female 11 0.689 (0.072, 6.629) 0.671 (0.135, 3.325) 0.679 (0.070, 6.526) 0.488 (0.054, 4.369)
EOCG-PSc ≦1 24 1 0.962 1 0.103 1 0.208 1 0.004*
2 9 0.947 (0.098, 9.104) 2.981 (0.743, 11.950) 0.285 (0.002, 2.670) 12.296 (1.372, 110.198)
T classification 2 or 3 16 1 0.048* 1 0.025* 1 0.043* 1 0.177
4a 17 8.832 (0.942, 1170.638) 7.636 (0.938, 62.177) 9.113 (0.972, 1208.026) 4.004 (0.447, 35.865)
N classification ≤1 17 1 0.933 1 0.896 1 0.355 1 0.140
>2 16 1.088 (0.153, 7.725) 1.097 (0.274, 4.393) 0.356 (0.037, 3.437) 4.521 (0.505, 40.472)
Stage III 8 1 0.245 1 0.084 1 0.235 1 0.184
IVA–IVB 25 3.047 (0.325, 0403.808) 6.170 (0.768, 798.247) 3.124 (0.333, 414.256) 3.828 (0.434, 502.762)
Treatment period <84 18 1 0.232 1 0.238 1 0.188 1 0.453
≥84 15 3.634 (0.378, 34.949) 2.329 (0.555, 9.768) 4.108 (0.426, 39.601) 1.98 (0.330, 11.895)
Irradiation period <63 19 1 0.817 1 0.252 1 0.219 1 0.392
≥63 14 1.260 (0.176, 9.023) 2.268 (0.539, 9.524) 3.741 (0.387, 36.178) 2.14 (0.357, 12.817)
Catheterization Ipsilateral 16 1 0.285 1 0.019* 1 0.276 1 0.020*
Bilateral 17 3.218 (0.334, 31.040) 8.274 (1.007, 67.954) 3.276 (0.336, 31.926) 11.878 (1.343, 1560.619)
Selected artery LA 6 1 0.954 1 0.159 1 0.170 1 0.319
LA-ECA 18 0.770 (0.069, 8.529) 0.888 (0.226, 4.853) 0.338 (0.052, 2.193) 1.000 (0.185, 9.985)
ECA 9 0.655 (0.041, 10.466) 0.114 (0.001,1.403) 0.122 (0.001, 1.503) 0.192 (0.001, 3.619)
Total dose of CDDPd <PAe 14 1 0.085 1 0.286 1 0.079 1 0.862
≥PA 19 6.711 (0.715, 889.729) 2.373 (0.476, 11.808) 6.857 (0.732, 908.802) 1.184 (0.197, 7.118)
Catheter infection No 29 1 0.415 1 0.165 1 0.011* 1 0.490
Yes 4 2.488 (0.258, 24.000) 3.042 (0.611, 15.145) 8.506 (1.195, 60.560) 2.176 (0.241,19.649)
Number of chemotherapies 1 7 1 0.719 1 0.185 1 0.793 1 0.222
2 26 0.661 (0.068, 6.410) 0.391 (0.093, 1.642) 0.748 (0.077, 7.257) 0.342 (0.057,2.050)

* P < 0.05

The hazard ratio, 95 % confidence interval, and P value were estimated using Cox regression with Firth’s penalized likelihood

aHazard ratio; b 95 % confidence interval; c Eastern Cooperative Oncology Group performance status; d CDDP, cisplatin; e planned amounts