Characteristic | Cases (n = 125) | Controls (n = 300) | OR (95 % CI) | P value |
---|---|---|---|---|
Age, years | ||||
Mean | 43.0 ± 15.0 | 44.9 ± 14.8 | 0.569 | |
Sex | ||||
Male | 83 | 198 | 1 | |
Female | 42 | 102 | 0.98(0.63-1.53) | 0.937 |
EBV serology test | ||||
Negative | 47 | 271 | 1 | |
Positive | 78 | 29 | 15.51(9.16-26.32) | <0.001 |
Originally involved site | ||||
Paranasal structure | 98 | |||
Other sites | 27 | |||
Tumor stage | ||||
IE | 63 | |||
II E | 38 | |||
III E | 15 | |||
IV E | 9 |