Multivariate Analyses for Disease-Free Survival (n = 188, Events = 95)
| Variable | Coefficient | Hazard ratio (confidence interval) | P |
|---|---|---|---|
| Age | 0.01 | 1.13 (0.89, 1.44) | 0.30 |
| Sex | −0.23 | 0.79 (0.52, 1.21) | 0.29 |
| Grade | |||
| High vs. low | 0.59 | 1.80 (0.80, 4.05) | 0.15 |
| Intermediate vs. low | 0.26 | 1.3 (0.59, 2.86) | 0.52 |
| Subtype | |||
| Cartilage vs. bone | 0.16 | 1.18 (0.42, 3.32) | 0.75 |
| Soft tissue vs. bone | −0.02 | 0.98 (0.40, 2.41) | 0.97 |
| Size (sqrt) | −0.00 | 0.93 (0.71, 1.21) | 0.6 |
| SUVmax (sqrt) | −0.05 | 0.96 (0.74, 1.23) | 0.72 |
| Heterogeneity (sqrt) | 0.51 | 1.75 (1.28, 2.40) | <0.001 |
As in Table 4, continuous variable, hazard ratio, and confidence intervals are interpreted as increase in survival risk associated with increase of 1 SD of covariate. Significant variables are in bold type. sqrt = square root.