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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