Table 3 Differences in notification (N) and hospitalization (H) rates by age group as compared to those aged 10–14 years. Values represent incidence rate ratios (95% confidence intervals) adjusted by year and gender

2.53 (2.43, 2.63)

3.09 (3.01, 3.18)

1.18 (1.14, 1.21)

2.25 (1.89, 2.68)

1.52 (1.33, 1.73)

0.76 (0.65, 0.88)

2.53 (2.28, 2.81)

7.03 (6.58, 7.51)

2.11 (1.96, 2.27)

2.85 (1.65, 4.92)

5.38 (3.74, 7.74)

2.18 (1.47, 3.23)

8.33 (6.50, 10.7)

11.0 (8.9, 13.5)

2.17 (1.71, 2.75)

5.56 (2.94, 10.5)

7.20 (4.37, 11.9)

1.85 (1.04, 3.28)

4.12 (3.71, 4.57)

10.6 (9.82, 11.4)

3.25 (3.00, 3.52)

5.34 (2.85, 10.0)

5.35 (3.24, 8.82)

1.43 (0.79, 2.57)

6.52 (6.06, 7.02)

5.31 (4.99, 5.65)

1.63 (1.52, 1.75)

10.8 (8.48, 13.7)

4.23 (3.38, 5.29)

1.44 (1.11, 1.86)

0.14 (0.02, 1.02)

1.65 (1.07, 2.55)

1.89 (1.26, 2.83)

0.25 (0.06, 1.01)

1.26 (0.82, 1.94)

1.48 (1.00, 2.20)

1.74 (1.14, 2.65)

4.57 (3.59, 5.81)

2.52 (1.96, 3.24)

2.24 (0.92, 5.44)

6.02 (3.51, 10.3)

3.98 (2.30, 6.88)

9.30 (8.21, 10.5)

6.27 (5.61, 7.00)

1.06 (0.92, 1.22)

19.4 (10.3, 36.6)

3.79 (1.97, 7.29)

1.93 (0.96, 3.88)