Table 1.
Characteristics of patient and control groups
| Characteristic | NPC patient | Non-NPC control | High-risk control |
|---|---|---|---|
| Number | 129 | 34 | 82 |
| Age (years) | |||
| Mean (minimum, maximum) | 46 (18, 73) | 48 (25, 67) | 50 (20, 68) |
| Gender | |||
| Male | 95 | 23 | 53 |
| Female | 34 | 11 | 29 |
| VCA-IgA titer | |||
| Negativity | 4 | 21 | 46 |
| 1:10–1:40 | 10 | 5 | 12 |
| ≥1:80 | 110 | 6 | 19 |
| No data | 5 | 2 | 5 |
| EBV DNA load in plasma | |||
| Negativity | 20 | 20 | |
| 1–1000 copy/mL | 4 | 0 | |
| ≥1000 copy/mL | 76 | 3 | |
| No data | 29 | 11 | |
| Cancer stage | |||
| Stage I/II | 11 | ||
| Stage III | 38 | ||
| Stage IV | 33 | ||
| Unknown | 47 | ||
| Recurrence | |||
| Yes | 3 | ||
| No | 126 | ||
| T stage | |||
| T1/T2/T3/T4 | 5/8/45/24 | ||
| N stage | |||
| N0/N1/N2/N3 | 5/35/30/12 | ||
| M stage | |||
| M0/M1 | 78/4 | ||
| Histopathology | |||
| WHO 3 | 129 | ||
EBV, Epstein–Barr virus; NPC, nasopharyngeal carcinoma.