Table 1. Baseline Characteristics of Patientsa.
| Characteristic | DDGP Group (n = 40) | SMILE Group (n = 40) |
|---|---|---|
| Age, median (IQR), y | 41.0 (19.5) | 42.5 (22.5) |
| Sex | ||
| Female | 17 (42.5) | 12 (30.0) |
| Male | 23 (57.5) | 28 (70.0) |
| Primary site | ||
| Non–upper aerodigestive tract | 2 (5.0) | 5 (12.5) |
| Upper aerodigestive tract | 38 (95.0) | 35 (87.5) |
| Cancer stage | ||
| III | 25 (62.5) | 18 (45.0) |
| IV | 15 (37.5) | 22 (55.0) |
| B Symptoms | ||
| Normal | 21 (52.5) | 19 (47.5) |
| Abnormal | 19 (47.5) | 21 (52.5) |
| Serum lactate dehydrogenase | ||
| Normal | 23 (57.5) | 18 (45.0) |
| Elevated | 17 (42.5) | 22 (55.0) |
| β2 Microglobulin level | ||
| Normal | 20 (50.0) | 20 (50.0) |
| Abnormal | 20 (50.0) | 20 (50.0) |
| International Prognostic Index score | ||
| 0-2 | 14 (35.0) | 13 (32.5) |
| 3-4 | 26 (65.0) | 27 (67.5) |
| ECOG Performance status | ||
| 0 | 6 (15.0) | 4 (10.0) |
| 1 | 24 (60.0) | 23 (57.5) |
| 2 | 10 (25.0) | 13 (32.5) |
| EBV-DNA copy numberb | ||
| Normal | 22 (55.0) | 19 (47.5) |
| Elevated | 18 (45.0) | 21 (52.5) |
Abbreviations: EBV, Epstein-Barr virus; ECOG, Eastern Cooperative Oncology Group.
a
No statistically significant difference was detected in the presented baseline characteristics (all P > .05).
b
The EBV-DNA copy number was tested with plasma samples by polymerase chain reaction method.