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Table 3 Results of univariate log-rank analysis of prognostic factors for bone recurrence-free survival in all patients (n = 161) receiving esophagectomy or stage II + III patients (n = 133) receiving esophagectomy

From: Is there a role of whole-body bone scan in patients with esophageal squamous cell carcinoma

Factors No. of patients (All, n= 161) Bone recurrence-free survival (All, n = 161) No. of patients (Stage II + III, n = 133) Bone recurrence-free survival (Stage II + III, n = 133)
No. of events P value No. of events P value
Bone scan before op       
Absent 42 6 0.009* 34 6 0.003*
Present 119 4   99 4  
Sex       
Male 156 10 0.480 129 10 0.475
Female 5 0   4 0  
Age       
<55y/o 88 4 0.417 71 4 0.584
>55y/o 73 6   62 6  
Tumor location       
Upper/middle 82 4 0.514 66 4 0.555
Lower 79 6   67 6  
Protocol       
Op 95 5 0.336 69 5 0.715
Pre-op CCRT + op 66 5   64 5  
T stage       
T1 + 2 53 2 0.160 25 2 0.757
T3 + 4 108 8   108 8  
N stage       
Negative 75 2 0.014* 47 2 0.100
Positive 86 8   86 8  
7thAJCC stage       
I + II 80 2 0.004* 52 2 0.037*
III 81 8   81 8  
Surgical margin       
Positive 12 0 0.505 10 0 0.604
Negative 149 10   123 10  
  1. Op, operation; CCRT, concurrent chemoradiotherapy *Statistically significant.