Table 1. Patient characteristics by tumor EBV status.
| Characteristics | EBV-positive tumors (n=58) | EBV-negative tumors (n=111) | ||
|---|---|---|---|---|
| Period of diagnosis, n(%) | 1994-2003 | 21 (30) | 50 (70) | |
| 2004-2010 | 19 (40) | 28 (60) | ||
| 2011-2012 | 18 (35) | 33 (65) | ||
| Country, n(%) | Korea | 15 (32) | 32 (68) | |
| Japan | 14 (50) | 14 (50) | ||
| Poland | 11 (50) | 11 (50) | ||
| Mexico | 6 (23) | 20 (77) | ||
| Honduras | 12 (26) | 34 (74) | ||
| Age in years, mean (SD) | 59 (11) | 60 (12) | ||
| Sex, n(%) | Male | 46 (38) | 75 (62) | |
| Female | 12 (25) | 36 (75) | ||
| Histological classification, n(%) | Diffuse | 29 (34) | 57 (66) | |
| Intestinal | 22 (37) | 38 (63) | ||
| Mixed | 1 (17) | 5 (83) | ||
| Unspecified | 6 (35) | 11 (65) | ||
Abbreviations: SD, standard deviation.