Table 1.
Baseline characteristics (demographics and features of first tumor)
| Parameter | Follow‐up without HNSCC | Follow‐up with HNSCC | P values |
|---|---|---|---|
| No. of patients | 20 | 20 | |
| Age (mean years ± SD) | 62 ± 9 | 69 ± 10 | .02a |
| Male sex (%) | 14 (70) | 17 (85) | .45b |
| Currently smokingc (%) | 8 (40) | 6 (30) | .74b |
| Pack years (median) | 31 | 45 | .71d |
| Missing | 0 | 2 | |
| Location of first tumor | .50b | ||
| Oral cavity (%) | 7 (35) | 4 (20) | |
| Oropharynx (%) | 6 (30) | 7 (35) | |
| Hypopharynx (%) | 0 | 2 (10) | |
| Larynx (%) | 7 (35) | 7 (35) | |
| Stage of first tumor | .97b | ||
| I (%) | 6 (30) | 4 (22) | |
| II (%) | 3 (15) | 2 (11) | |
| III (%) | 4 (20) | 4 (22) | |
| IV (%) | 7 (35) | 8 (44) | |
| Missing | 0 | 2 | |
| History of oncologic treatment | .99b | ||
| Radiotherapy (%) | 5 (25) | 5 (25) | |
| Surgery (%) | 5 (25) | 5 (25) | |
| (Chemo)radiotherapy (%) | 4 (20) | 4 (20) | |
| Surgery and (chemo) radiotherapy (%) | 3 (15) | 3 (15) | |
| Combination of above (%) | 3 (15) | 3 (15) | |
| Days after treatment (median ± range) | 663 ± 2508 | 964 ± 7569 | .27d |
| Missing | 1 | 1 |
a
Independent samples t test.
b
Fisher's exact test.
c
Defined as no smoking for at least 1 month.
d
Mann‐Whitney U test.