Table.
Patient characteristics for case-matching (in order of priority assigned) between patients with oropharyngeal cancer treated with intensity-modulated proton therapy versus those treated with photon-based intensity-modulated radiation therapy.
| Characteristic |
No. of patients given IMPT (%) |
No. of patients given IMRT (%) |
P value |
| Laterality of radiation | 1.00 | ||
| Unilateral | 5 (20) | 5 (20) | |
| Bilateral | 20 (80) | 20 (80) | |
| Tumor location | 1.00 | ||
| Tonsil | 18 (72) | 18 (72) | |
| Base of tongue | 7 (28) | 7 (28) | |
| T category | 1.00 | ||
| 1 | 5 (20) | 5 (20) | |
| 2 | 16 (64) | 16 (64) | |
| 3 | 2 (8) | 2 (8) | |
| 4 | 2 (8) | 2 (8) | |
| N category | 1.00 | ||
| 0 | 1 (4) | 1 (4) | |
| 1 | 5 (20) | 5 (20) | |
| 2a | 2 (8) | 2 (8) | |
| 2b | 10 (40) | 10 (40) | |
| 2c | 5 (20) | 5 (20) | |
| 3 | 2 (8) | 2 (8) | |
| Received concurrent chemotherapy | 13 (52) | 15 (60) | .776 |
| Received neoadjuvant chemotherapy | 16 (64) | 14 (56) | .773 |
| Smoking status | .848 | ||
| Current | 5 (20) | 4 (16) | |
| Former | 7 (28) | 6 (24) | |
| Never | 13 (52) | 15 (60) | |
| Sex | .667 | ||
| Male | 23 (92) | 21 (86) | |
| Female | 2 (8) | 4 (16) | |
| Age, median (range), y | 60 (37-83) | 55 (43-74) | .046 |
Abbreviations: IMPT, intensity-modulated proton therapy; IMRT, intensity-modulated radiation therapy.