Clinical characteristics of patients in training and test groupsa
| Clinical Characteristics | Separate Patient Group to Train Readers (n = 20) | Patient Group to Test Diagnostic Accuracy | ||
|---|---|---|---|---|
| Recurrent Tumor (n = 28) | Posttreatment Change (n = 35) | P Value | ||
| Male/female ratio | 12:8 | 18:10 | 29:6 | .105 |
| Age (mean) (yr) | 55 ± 10 | 60 ± 11 | 58 ± 12 | .452 |
| Primary site | ||||
| Nasopharynx | 5 (25) | 6 (21) | 9 (26) | |
| Oral cavity | 6 (30) | 11 (39) | 11 (31) | |
| Oropharynx | 4 (20) | 5 (18) | 5 (14) | |
| Larynx/hypopharynx | 2 (10) | 3 (11) | 4 (11) | |
| PNS | 3 (15) | 3 (11) | 6 (17) | |
| Treatment modality | .183 | |||
| OP | 10 (50) | 13 (46) | 12 (34) | |
| CCRT | 8 (45) | 13 (46) | 16 (45) | |
| OP + RT | 2 (10) | 2 (7) | 7 (20) | |
| Mean time interval (range)b | 28 (12–35) | 27 (12–60) | 24 (10–41) | .518 |
| Final diagnosis | ||||
| Pathologic exam | 18 | 7 | ||
| Clinical follow-up | 10 | 28 | ||
Note:—CCRT indicates concurrent chemoradiation therapy; NA, not applicable; OP, operation; PNS, paranasal sinus; RT, radiation therapy.
↵a Numbers in parentheses are percentages except where noted.
↵b Mean time interval is expressed as months and the period between the end of treatment and MR imaging.