Characteristics of the study groups
| Laryngeal Cancer | Lymphoma | P-Value | |
|---|---|---|---|
| Sex | |||
| Male | 33 (67%) | 33 (67%) | 1.00 |
| Female | 16 (33%) | 16 (33%) | |
| Age (yr) | |||
| Mean [SD] | 58.9 [11.0] | 58.9 [11.1] | 1.00 |
| Minimum | 25 | 25 | |
| Maximum | 83 | 84 | |
| Smoking history | |||
| Yes | 47 (96%) | 26 (53%) | <.001 |
| No | 2 (4%) | 23 (47%) | |
| Radiation dose (Gy) | |||
| Median | 70.0 | NA | |
| Minimum | 64.0 | NA | |
| Maximum | 70.2 | NA | |
| Neck CTs | |||
| Total | 222 | 226 | |
| Per patient (mean) (SD) | 4.5 (2.8) | 4.6 (2.7) | .88 |
| Minimum | 2 | 2 | |
| Maximum | 16 | 14 | |
| Months of CT follow-upa | |||
| Total | 1005 | 1835 | |
| Mean (SD) | 20.5 (13.5) | 37.4 (31.4) | <.001 |
| Minimum | 4 | 1 | |
| Maximum | 59 | 162 |
Note:—NA indicates not applicable.
↵a For patients with laryngeal cancer, follow-up ended when either no more neck CTs were available or the patient underwent salvage laryngectomy.