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. 2015 Dec 16;15:977. doi: 10.1186/s12885-015-1964-8

Table 1.

Baseline characteristics of 491 patients with nasopharyngeal carcinoma

Low-dose group 14(2.9 %) Medium-dose group 378(77.0 %) High-dose group 99(20.2 %) P value
Age(yr.), 0.081
  <45 7(50.0 %) 170(45.0 %) 57(57.6 %)
  ≥45 7(50.0 %) 208(55.0 %) 42(42.4 %)
Gender 0.284
  Female 6(42.9 %) 103(27.2 %) 132(26.9 %)
  Male 8(57.1 %) 275(72.8 %) 359(73.1 %)
T stage 0.960
  1 1(7.1 %) 23(6.1 %) 7(7.1 %)
  2 2(14.3 %) 68(18.0 %) 15(15.2 %)
  3 7(50.0 %) 217(57.4 %) 57(57.6 %)
  4 4(28.6 %) 70(18.5 %) 20(20.3 %)
N stage 0.306
  0 2(14.3 %) 55(14.6 %) 8(8.1 %)
  1 8(57.1 %) 140(37.0 %) 47(47.5 %)
  2 4(28.6 %) 159(42.1 %) 38(38.4 %)
  3 0(0) 24(6.3 %) 6(6.1 %)
Clinical stage 0.492
  2 3(21.4 %) 30(7.9 %) 9(9.1 %)
  3 8(57.1 %) 256(67.7 %) 64(64.6 %)
  4 3(21.4 %) 92(24.3 %) 26(26.3 %)
WHO type 0.418
  2 0(0) 15(4.5 %) 7(7.6 %)
  3 12(100.0 %) 316(95.5 %) 85(92.4 %)
ECOG score 0.859
  0 0(0) 8(2.1 %) 2(2.0 %)
  1 14(100.0 %) 370(97.9 %) 97(98.0 %)
ACE-27 0.159
  0 8(57.1 %) 296(78.1 %) 78(78.8 %)
  1 5(35.7 %) 71(18.7 %) 21(21.2 %)
  2 1(7.1 %) 12(3.2 %) 0(0)
  3 0(0) 0(0) 0(0)
EBV DNA 0.942
  ≥4000 8(57.1 %) 232(61.4 %) 60(60.6 %)
  <4000 6(42.9 %) 146(38.6 %) 39(39.4 %)
RT Dose(Gy), Median(range) 68.0(68.0-70.0) 68.0(66.0-70.0) 68.0(66.0-70.0) 0.359
VCA-IgA 0.431
Positive(≥1:80) 10(71.4 %) 314(83.1 %) 79(79.8 %)
Negative(<1:80) 4(28.6 %) 64(16.9 %) 20(20.2 %)
EA-IgA 0.425
Positive(≥1:10) 8(57.1 %) 276(73.0 %) 72(72.7 %)
Negative(<1:10) 6(42.9 %) 102(27.0 %) 27(27.3 %)
Median follow-up in months(range) 46.5(3–80) 48(1–88) 53(11–86) 0.018

Abbreviations: yr year, WHO World Health Organization, ECOG Eastern Cooperative Oncology Group, EBV DNA Epstein–Barr virus deoxyribonucleic acid, RT radiotherapy

P value < 0.05 indicates a statistically significant difference