Skip to main content

Table 3 Survival analysis of each preoperative factor

From: Analysis of the predictive role and new proposal for surgical strategies based on the modified Tomita and Tokuhashi scoring systems for spinal metastasis

Preoperative factor No. of patients Survival period (months) P value
    Mean (95% CI) Median (95% CI)  
Age Less than 65 87 19.4 (13.6 - 25.2) 5.8 (4.3 - 7.3) 0.235
65 or more 25 8.6 (5.7 - 11.6) 6.1 (3.8 - 8.5)
Gender Male 87 16.5 (11.3 - 21.7) 5.8 (4.9 - 6.8) 0.460
Female 25 20.7 (9.9 - 31.4) 8.0 (2.0 - 13.9)
Spinal level Cervical 21 9.9 (3.6 - 16.2) 4.2 (3.7 - 4.6) 0.373
Thoracic 53 17.7 (11.1 - 24.3) 6.5 (3.4 - 9.7)
Lumbosacral 27 14.9 (8.5 - 21.3) 5.9 (4.9 - 6.8)
Multiple 11 18.3 (2.4 - 34.1) 7.7 (3.4 - 11.9)
Operation type Type 1 3 35.7 (16.2 - 55.3) N/A 0.228
Type 2 56 14.1 (9.7 - 18.6) 5.6 (2.2 - 9.0)
Type 3 41 17.6 (9.6 - 25.7) 6.1 (5.3 - 6.9)
Type 4 12 8.8 (2.1 - 15.6) 5.3 (0.2 - 10.3)
Time interval to metastasis* None 36 24.4 (14.7 - 34.1) 7.8 (1.9 - 13.8) 0.023*
<1 year 20 7.4 (2.9 - 11.9) 5.1 (2.0 - 8.2)
>1 year 56 17.3 (10.7 - 24.0) 5.5 (4.3 - 6.8)
Time interval to operation Immediate 84 19.7 (13.9 - 25.5) 6.2 (3.8 - 8.7) 0.039
Delayed 28 8.1 (4.5 - 11.7) 5.0 (3.0 - 7.1)
Total 112 17.3 (12.6 - 22.1) 5.8 (5.0 - 6.7)  
  1. *The interval between the diagnosis of primary malignancy and that of spinal metastasis; the interval between the diagnosis of spinal metastasis and surgery: these intervals were significantly associated with survival according to the log-rank test. N/A, estimation data not available due to the lack of uncensored cases.