Multivariate analysis of prognostic factors using the Cox proportional hazards model with forward stepwise selection in 182 patients with HGA and spectra obtained at LTEa
| Variable/Value | No. | Hazard Ratio | P |
|---|---|---|---|
| Clinical parameters/treatment | <.001 | ||
| Conservative support | 58 | 12.241 (7.556–19.831) | |
| Radiotherapy alone | 34 | 1.784 (1.116–2.853) | |
| Chemoradiotherapy | 90 | 1.000 | |
| Spectroscopy parameters | |||
| Intensity signals normalized to unit-length (NI) | |||
| NI0.98 | <.001 | ||
| <0.0267 | 103 | 0.499 (0.339–0.736) | |
| >0.0267 | 79 | 1.000 | |
| NI1.25 | .015 | ||
| <0.0098 | 60 | 0.574 (0.368–0.897) | |
| >0.0098 | 122 | 1.000 |
a Age (<50 years vs > 50 years), sex, WHO grade, KPS, and extent of surgery were not selected as elective prognostic factors.