Table 2 Patient characteristics
| Â | n | % |
|---|---|---|
All patients | 266 | 100.00 |
 Male | 179 | 67.30 |
 Female | 87 | 32.70 |
First diagnosis | ||
 Mean age (SD) in years | 63.0 (+/−  9.7) |  |
 Primary tumor | ||
 located in Colon (C18) | 151 | 56.77 |
  Rectosigmoid junction (C19) | 18 | 6.77 |
  Rectum (C20) | 98 | 36.84 |
  T1,T2 | 29 | 10.90 |
  T3,T4 | 227 | 85.30 |
  T missing | 10 | 3.80 |
  N0 | 74 | 27.80 |
  N1,2 | 179 | 67.30 |
  N status missing | 13 | 4.90 |
 Synchronous metastases | 166 | 62.41 |
Prior treatment | ||
 Systemic chemotherapy | 248 | 93.23 |
 Median lines of chemotherapy (range) | 2 (0–8) |  |
 Radiochemotherapy | 30 | 11.28 |
 Surgery for colorectal primary | 263 | 98.87 |
 Radiation therapy for colorectal primary | 21 | 7.89 |
 Surgery for liver metastases | 91 | 34.21 |
 Other local treatment for liver metastases | 40 | 15.04 |
 Surgery for lung metastases | 14 | 5.26 |
 Surgery for other metastases | 20 | 7.52 |
 Local therapy for other metastases | 5 | 1.88 |
First interventional treatment | ||
 Mean age (SD) in years | 66,5 (+/−9.6) |  |
 Age > 70 years | 89 | 33.5 |
 Median Karnofsky index (range) in % | 80 (50–100) |  |
 Liver metastases | 251 | 96.99 |
 Liver metastases only | 121 | 45.50 |
 Liver involvement > 25% | 45 | 16.92 |
 Lung involvement | 100 | 37.60 |
 Other | 83 | 31.20 |
 ≥ 2 organ systems involved | 140 | 52.63 |