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Table 3 Poisson regression: excess risk of death by stratified by country

From: Do Asian breast cancer patients have poorer survival than their western counterparts? A comparison between Singapore and Stockholm

  Singapore Stockholm
  Hazard ratio 95% confidence interval P value Hazard ratio 95% confidence interval P value
Year of follow-up       
   1 year 1.00 (Reference)   1.00 (Reference)  
   2 years 1.32 1.14 to 1.51 <0.001 1.69 1.47 to 1.94 <0.001
   3 years 1.21 1.04 to 1.40 0.013 1.90 1.65 to 2.18 <0.001
   4 years 1.12 0.95 to 1.31 0.178 1.71 1.48 to 1.98 <0.001
   5 years 0.96 0.81 to 1.14 0.631 1.84 1.59 to 2.14 <0.001
Age group       
   <35 years 1.00 (Reference)   1.00 (Reference)  
   35 to 54 years 0.65 0.54 to 0.78 <0.001 0.71 0.57 to 0.88 0.002
   45 to 54 years 0.66 0.55 to 0.79 <0.001 0.56 0.45 to 0.69 <0.001
   55 to 64 years 0.91 0.75 to 1.10 0.314 0.60 0.49 to 0.74 <0.001
   65 to 74 years 0.77 0.62 to 0.96 0.022 0.78 0.64 to 0.96 0.019
   75+ years 1.06 0.81 to 1.39 0.673 0.89 0.71 to 1.10 0.281
Stage       
   Local 1.00 (Reference)   1.00 (Reference)  
   Regional 3.66 3.22 to 4.17 <0.001 4.02 3.66 to 4.41 <0.001
   Distant 13.29 11.41 to 15.48 <0.001 17.25 15.09 to 19.71 <0.001
Period of diagnosis       
   1980 to 1989 1.00 (Reference)   1.00 (Reference) <0.001
   1990 to 1999 0.53 0.48 to 0.58 <0.001 0.91 0.83 to 0.99 0.027