Table 1 Candidate prognostic factors in the derivation and validation datasets
From: External validation of a Cox prognostic model: principles and methods
Variable name | Variable | (Definition/units) | Â | n(%) or mean (SD) | Â | |
|---|---|---|---|---|---|---|
| Â | Â | Â | Derivation | Validation | ||
Tumour size | sized0 | (≤20 mm) | 501 | (32%) | 180 | (26%) |
| Â | sized1 | (20 to 50 mm) | 783 | (51%) | 453 | (66%) |
| Â | sized2 | (>50 mm) | 262 | (17%) | 53 | (8%) |
Menopausal status | meno | (premenopausal) | 628 | (41%) | 290 | (42%) |
| Â | Â | (postmenopausal) | 918 | (59%) | 396 | (58%) |
Hormone treatment | hormon | (no) | 1207 | (78%) | 440 | (64%) |
| Â | Â | (yes) | 339 | (22%) | 246 | (36%) |
Age | age | (years) | 56.0 | (13.0) | 53.1 | (10.1) |
Positive lymph nodes | nodes | (number) | 5.2 | (4.9) | 5.0 | (5.5) |
Progesterone recep. | pgr | (fmol/l) | 156 | (299) | 110 | (202) |
Oestrogen recep. | er | (fmol/l) | 165 | (267) | 96 | (153) |