Table 3 Rate ratio (RR) of excess mortality or hospitalization associated with influenza between the post-SARS and pre-SARS (reference) periods in Hong Kong and Brisbane; and the ratio of RR (RRR) between Hong Kong (HK) and Brisbane

RR

95% CI

RR

95% CI

RR

95% CI

RR

95% CI

RR

95% CI

RR

95% CI

 All-causes

1.22

(1.10,1.35)

0.87

(0.62,1.21)

1.48

(1.35,1.63)

0.93

(0.72,1.19)

2.62

(2.25,3.05)

4.39

(2.67,7.22)

 CRD

0.90

(0.80,1.01)

0.79

(0.54,1.15)

1.11

(1.00,1.23)

3.54

(2.23,5.62)

1.25

(1.08,1.45)

4.75

(2.55,8.83)

 P&I

2.50

(2.00,3.13)

NE

1.26

(1.06,1.49)

NE

1.53

(1.23,1.91)

NE

 COPD

1.04

(0.78,1.38)

1.03

(0.44,2.39)

NE

1.71

(0.54,5.37)

NE

1.39

(0.62,3.13)

 Stroke

0.74

(0.50,1.09)

0.33

(0.13,0.80)

NE

0.31

(0.14,0.71)

1.18

(0.81,1.71)

0.58

(0.28,1.20)

 IHD

0.45

(0.34,0.58)

1.09

(0.62,1.90)

0.48

(0.40,0.58)

1.36

(0.81,2.27)

0.16

(0.11,0.23)

NE

 CRD

0.86

(0.82,0.91)

26.82

(9.56,75.24)

5.25

(4.86,5.68)

NE

15.83

(13.50,18.56)

28.09

(9.80,80.53)

 P&I

2.79

(2.57,3.03)

3.49

(1.96,6.21)

5.18

(4.74,5.67)

NE

6.37

(5.65,7.19)

2.02

(1.20,3.40)

 COPD

1.04

(0.96,1.14)

1.33

(0.91,1.93)

9.12

(7.77,10.71)

1.35

(0.96,1.89)

NE

1.10

(0.76,1.59)

 Stroke

0.15

(0.12,0.19)

NE

0.02

(0.01,0.05)

NE

NE

NE

 IHD

NE

NE

NE

NE

NE

NE

 All-causes

1.41

(1.28,1.56)

2.39

(1.83,3.12)

1.16

(1.06,1.28)

2.06

(1.67,2.55)

2.96

(2.55,3.44)

7.21

(4.48,11.62)

 CRD

1.16

(1.04,1.29)

0.98

(0.69,1.38)

1.06

(0.96,1.18)

4.10

(2.61,6.44)

1.48

(1.29,1.71)

2.19

(1.12,4.27)

 P&I

2.44

(1.95,3.05)

NE

1.51

(1.28,1.77)

NE

1.69

(1.37,2.09)

NE

 COPD

1.07

(0.81,1.41)

1.75

(0.83,3.67)

NE

7.42

(2.82,19.54)

NE

1.86

(0.87,3.96)

 Stroke

1.26

(0.90,1.77)

0.29

(0.12,0.72)

NE

0.77

(0.42,1.39)

1.43

(1.01,2.03)

0.43

(0.20,0.93)

 IHD

0.74

(0.59,0.92)

NE

0.34

(0.27,0.41)

NE

0.40

(0.31,0.51)

NE