Table 2 Estimated incidence rate and incidence rate ratios of anaphylaxis from 2009–2019

Population of Hong Kong [10]

6,966,400

7,052,100

7,109,500

7,171,000

7,210,900

7,252,900

7,309,700

7,377,100

7,413,100

7,486,400

7,500,700

Aged 0–19

1,281,000

(18.4%)

1,257,600

(17.8%)

1,236,900

(17.4%)

1,220,100

(17.0%)

1,194,600

(16.6%)

1,183,300

(16.3%)

1,174,500 (16.1%)

1,167,600 (15.8%)

1,152,800 (15.5%)

1,155,900 (15.4%)

1,161,800 (15.4%)

Estimated incidence rates (per 100,000 population)

 Total incidence rate

2.27

2.44

2.15

2.19

2.80

4.44

4.47

4.35

4.59

4.69

4.68

Paediatric

2.11

2.54

1.70

1.64

2.68

5.07

4.94

4.20

5.99

6.32

7.40

Adult

2.30

2.42

2.25

2.30

2.83

4.32

4.38

4.38

4.33

4.39

4.18

Incidence rate ratios^a

 Total incidence rate ratio (95% confidence interval)

Ref

1.07 (0.83, 1.28)

0.95 (0.78, 1.22)

0.96 (0.79, 1.23)

1.23 (0.89, 1.35)

1.96 (1.11, 1.62)

1.97 (1.11, 1.62)

1.92 (1.10, 1.60)

2.02 (1.12, 1.64)

2.07 (1.14, 1.65)

2.06 (1.13, 1.65)

Paediatric (95% confidence interval)

Ref

1.20 (0.65, 1.81)

0.81 (0.51, 1.61)

0.78 (0.50, 1.60)

1.27 (0.66, 1.85)

2.40 (0.93, 2.30)

2.34 (0.92, 2.28)

1.99 (0.84, 2.16)

2.84 (1.01, 2.45)

3.00 (1.04, 2.50)

3.51 (1.12, 2.66)

Adult (95% confidence interval)

Ref

1.05 (0.81, 1.30)

0.98 (0.78, 1.26)

1.00 (0.79, 1.27)

1.23 (0.87, 1.37)

1.88 (1.07, 1.62)

1.90 (1.07, 1.63)

1.90 (1.07, 1.63)

1.88 (1.07, 1.62)

1.91 (1.08, 1.63)

1.82 (1.05, 1.60)