Research Article
Prediction of Solitary Plasmacytoma of Bone in Elderly Patients: A Nomogram and a Risk Classification System for Overall Survival
Table 2
Univariate and multivariate analyses of variables associated with overall survival.
| Variables | Univariate analysis | Multivariate analysis | HR (95% CI) | value | HR (95% CI) | value |
| Age, year | | | | | 60-70 | Reference | | Reference | | 71-82 | 1.926 (1.526, 2.432) | ≤0.001 | 1.856 (1.469, 2.345) | ≤0.001 | >82 | 4.857 (3.691, 6.492) | ≤0.001 | 4.305 (3.256, 5.692) | ≤0.001 | Sex | | | | | Female | Reference | | | | Male | 0.867 (0.707, 1.062) | 0.167 | | | Race | | | | | Black | Reference | | | White | 0.943 (0.709, 1.255) | 0.689 | | Other | 1.269 (0.806, 1.998) | 0.304 | | Marital status | | | | | No | Reference | | Reference | | Yes | 0.593 (0.483, 0.727) | ≤0.001 | 0.670 (0.544, 0.824) | ≤0.001 | Primary site | | | | | Trunk | Reference | | | | Extremities | 1.117 (0.850, 1.469) | 0.427 | | | Facial/skull bone | 1.256 (0.902, 1.750) | 0.177 | | | Grade | | | | | I/II | Reference | | | | III/IV | 1.616 (0.679, 3.848) | 0.278 | | | Pre-B cell | 1.048 (0.533, 2.062) | 0.892 | | | Stage | | | | | Localized | Reference | | | | Distant | 1.055 (0.811, 1.372) | 0.690 | | | Surgery | | 0.083 | | | No | Reference | Reference | | Yes | 0.802 (0.624, 1.030) | 0.902 (0.702, 1.160) | 0.422 | Chemotherapy | | | | | No | Reference | | | | Yes | 1.037 (0.810, 1.327) | 0.774 | | | Radiotherapy | | | | | No | Reference | | Reference | | Yes | 0.599 (0.480, 0.746) | ≤0.001 | 0.695 (0.557, 0.868) | ≤0.001 |
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