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Table 3 Pairwise comparisons of survival between subgroups

From: Preoperative palsy score has no significant association with survival in non-small-cell lung cancer patients with spinal metastases who undergo spinal surgery

Variable Chi-square p value
Histology   
 Adeno vs Non-adeno 8.7 0.003*
Sex   
 F vs M 1.5 0.220
Age (year)   
 ≤54 vs 55–74 0.19 0.660
 ≤54 vs ≥75 7.3 0.007*
 55–74 vs ≥75 6.41 0.010*
Pre-op PS   
 0 vs 1 0.45 0.500
 0 vs 2 13.44 <0.001*
 1 vs 2 13.99 <0.001*
Pre-op palsy   
 0 vs 1 0.027 0.870
Post-op palsy   
 0 vs 1 1.95 0.160
 0 vs 2 6 0.010*
 1 vs 2 9.12 0.003*
BMI   
 1 vs 2 0.02 0.878
 1 vs 3 1.07 0.301
 2 vs 3 0.97 0.324
Number of vertebra involved   
 <3 vs ≥3 0.23 0.630
Other bone metastasis   
 Without vs with 0.05 0.818
Visceral metastasis   
 Without vs with 0.33 0.567
  1. *Significant at p-value <0.05
  2. Adeno adenocarcinoma, Non-adeno non-adenocarcinoma, PS performance status, BMI body mass index, BMI 1 underweight, 2 eutrophic, 3 overweight/obese