Table 1. Patient characteristics – Localised disease.
| Variable | Total | After imputation | Children, <18 years | Young adults, 18–34 years | Adults, 35–64 years | Elderly, ⩾65 years | P-value, chi-square |
|---|---|---|---|---|---|---|---|
| Number of patients | 461 (100%) | 54 (11.7%) | 148 (32.1%) | 204 (44.3%) | 55 (11.9%) | ||
|
Sex | |||||||
| Male | 248 (53.8%) | 31 (57.4%) | 88 (59.5%) | 98 (48.0%) | 31 (56.4%) | 0.168 | |
| Female | 213 (46.2%) | 23 (42.6%) | 60 (40.5%) | 106 (52.0%) | 24 (43.6%) | ||
|
Histology | |||||||
| Monophasic | 103 (22.3%) | (48.3%) | 15 (53.3%)* | 34 (43.7%)* | 41 (47.3%)* | 13 (59.3%)* | 0.496 |
| Biphasic | 109 (23.6%) | (51.7%) | 14 (46.7%)* | 44 (56.3%)* | 43 (52.7%)* | 8 (40.7%)* | |
| Unknown | 249 (54.0%) | ||||||
|
Tumour size | |||||||
| ⩽5 cm | 183 (39.7%) | (45.2%) | 16 (43.7%)* | 73 (53.8%)* | 76 (41.7%)* | 18 (36.3%)* | 0.107 |
| >5 cm | 208 (45.1%) | (54.8%) | 18 (56.3%)* | 60 (46.2%)* | 100 (58.3%)* | 30 (63.7%)* | |
| Unknown | 70 (15.2%) | ||||||
|
Tumour depth | |||||||
| Superficial | 102 (22.1%) | (48.8%) | 8 (46.5%)* | 37 (52.1%)* | 44 (46.0%)* | 13 (52.9%)* | 0.832 |
| Deep | 110 (23.9%) | (51.2%) | 9 (53.5%)* | 35 (47.9%)* | 54 (54.0%)* | 12 (47.1%)* | |
| Unknown | 249 (54.0%) | ||||||
|
Site of origin | |||||||
| Extremities | 303 (65.7%) | 35 (64.8%) | 107 (72.3%) | 129 (63.2%) | 32 (58.2%) | 0.161 | |
| Head and neck | 39 (8.5%) | 8 (14.8%) | 11 (7.4%) | 15 (7.4%) | 5 (9.1%) | ||
| Trunk | 86 (18.7%) | 10 (18.5%) | 23 (15.5%) | 39 (19.1%) | 14 (25.5%) | ||
| Othera | 33 (7.2%) | 1 (1.9%) | 7 (4.7%) | 21 (10.3%) | 4 (7.3%) | ||
|
Primary treatment | |||||||
| Surgery only | 158 (34.3%) | 16 (29.6%) | 51 (34.5%) | 77 (37.8%) | 14 (25.5%) | <0.001 | |
| Surgery+RT (+CT) | 219 (47.5%) | 25 (46.3%) | 76 (51.4%) | 94 (46.1%) | 24 (43.6%) | ||
| Surgery+CT | 39 (8.5%) | 11 (20.4%) | 14 (9.5%) | 11 (5.4%) | 3 (5.5%) | ||
| No surgery | 45 (9.8%) | 2 (3.7%) | 7 (4.7%) | 22 (10.8%) | 14 (25.5%) | ||
|
Hospital of surgery | |||||||
| General hospital | 179 (43.0%) | 13 (25.0%) | 59 (41.8%) | 87 (47.8%) | 20 (48.8%) | 0.026 | |
| Academic hospital | 237 (57.0%) | 39 (75.0%) | 82 (58.2%) | 95 (52.2%) | 21 (51.2%) | ||
| No surgery performed | 45 | ||||||
|
Resection status | |||||||
| R0/Rx | 361 (86.8%) | 50 (96.2%) | 123 (87.2%) | 154 (84.6%) | 34 (82.9%) | 0.152 | |
| R1/R2 | 55 (13.2%) | 2 (3.8%) | 18 (12.8%) | 28 (15.4%) | 7 (17.1%) | ||
| No surgery performed | 45 | ||||||
Abbreviations: CT=chemotherapy; RT=radiotherapy.
a
The group ‘other' consisted of lung (n=14), mediastinum (n=8), (retro)peritoneum (n=5), kidney (n=3), stomach (n=2), and unknown (n=1).