Patient Characteristics and Events
| Characteristic | Data |
| Age at baseline PET (y) | |
| Mean | 60 |
| Range | 39–75 |
| Sex (n = 48) | |
| Female | 10 (21) |
| Male | 38 (79) |
| Smoking (n = 48) | |
| Active | 33 (69) |
| Former | 12 (25) |
| Unknown | 3 (6) |
| Alcohol use (n = 48) | |
| Active | 35 (73) |
| Former | 4 (8) |
| Never | 4 (8) |
| Unknown | 5 (10) |
| T stage (n = 50) | |
| 1 | 1 (2) |
| 2 | 25 (50) |
| 3 | 17 (34) |
| 4 | 7 (14) |
| N stage (n = 50) | |
| 0 | 22 (44) |
| 1 | 6 (12) |
| 2a | — |
| 2b | 11(22) |
| 2c | 11 (22) |
| International Union Against Cancer stage (n = 50) | |
| II | 12 (24) |
| III | 13 (26) |
| IVA | 25 (50) |
| Histologic grade (n = 50) | |
| 1 | 4 (8) |
| 2 | 26 (52) |
| 3 | 11 (22) |
| Unknown | 9 (18) |
| Primary tumor site (n = 50) | |
| Oral cavity | 1 (2) |
| Oropharynx | 27 (54) |
| Larynx | 14 (28) |
| Hypopharynx | 8 (16) |
| Treatment (n = 48) | |
| Radiotherapy | 33 (69) |
| Chemoradiotherapy | 15 (31) |
| No. of events tumor-related (n = 48) | |
| Locoregional recurrence | 7 (15) |
| Distant metastases* | 4 (8) |
| Tumor-related death | 7 (15) |
| No. of events not tumor-related (n = 48) | |
| Death due to another cause | 6 (13) |
| Second primary tumor after start of study† | 8 (17) |
↵* Distant metastases (pulmonal, skeletal, cerebral, and cutaneous) were detected after 7, 9, and 11 mo.
↵† Second primary tumors were located in head and neck area, lungs, esophagus, rectum, bladder, and skin.
Data are numbers of patients, with percentages in parentheses, except for age, which is years.