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Table 3 Nasopharyngeal Carcinoma Survival Rate and Adjusted Hazard Ratios by Physician Caseload Groups and the Characteristics of the Patients and Providers (n = 1225)

From: Survival rate in nasopharyngeal carcinoma improved by high caseload volume: a nationwide population-based study in Taiwan

Variable Adjusted hazard ratio 95% CI p
Physician characteristics    
   Physician volume    
Low (3-17) 1   
Medium (17-53) 0.884 0.70-1.16 0.884
High (54-130) 0.60 0.45-0.78 < 0.001
   Physician age    
40 years 1   
41-50 years 1.22 0.97-1.52 0.086
≥51 years 0.78 0.59-1.02 0.073
Hospital characteristics    
   Hospital ownership    
Public 1   
Non-for-profit 1.11 0.87-1.42 0.414
For-profit 0.94 0.65-1.36 0.746
   Hospital level    
Medical center 1   
Regional hospital 0.88 0.68-1.16 0.368
District hospital 1.25 0.77-2.03 0.376
Patient characteristics    
   Patient gender    
Female 1   
Male 0.93 0.75-1.15 0.509
   Patient age    
35-44 years 1   
45-54 years 1.15 0.89-1.49 0.277
55-64 years 1.10 0.83-1.45 0.507
65-74 years 1.12 0.81-1.56 0.488
75 years 0.88 0.48-1.51 0.675
   Charlson Comorbidity Index score    
< 4 1   
4 1.28 1.04-1.56 0.018
   Treatment modality    
Radiotherapy 1   
Chemoradiotherapy 1.03 0.82-1.29 0.784
   Geographic location    
North 1   
Central 1.18 0.90-1.55 0.242
Southern and Eastern 1.30 1.00-1.70 0.051
   Enrollee category    
EC 1-2 1   
EC 3 1.35 0.71-2.55 0.358
EC 4 1.04 0.86-1.26 0.698
  1. 95% CI, 95% confidence interval.