Table 1.
GBS rates in England between 2019 and July 2021, separated by age group
| Age group, years | Number of cases | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 2019 | 2020 | 2021 January –July (Estimated annual 2021 total) | |||||||
| GBS cases | ONS (million) | GBS rate per 100 000 patient years | GBS cases | ONS (million) | GBS rate per 100 000 patient years | GBS cases | ONSa (million) | GBS rate per 100 000 patient years | |
| 18–29 | 109 | 8.55 | 1.28 | 90 | 8.48 | 1.06 | 38 (65) | 8.48 | 0.77 |
| 30–39 | 117 | 7.54 | 1.55 | 99 | 7.56 | 1.31 | 48 (82) | 7.56 | 1.09 |
| 40–49 | 120 | 7.13 | 1.68 | 110 | 7.11 | 1.55 | 84 (144) | 7.11 | 2.04 |
| 50–59 | 191 | 7.58 | 2.52 | 138 | 7.64 | 1.81 | 161 (276) | 7.64 | 3.63 |
| 60–69 | 213 | 5.91 | 3.60 | 200 | 5.98 | 3.34 | 145 (248) | 5.98 | 4.18 |
| 70–79 | 202 | 4.72 | 4.28 | 163 | 4.82 | 3.38 | 101 (173) | 4.82 | 3.61 |
| 80+ | 98 | 2.84 | 3.45 | 60 | 2.86 | 2.10 | 27 (46) | 2.86 | 1.63 |
Estimated annual total for 2021 (italics) was extrapolated assuming stable GBS incidence across the year based on numbers from January to July 2021. GBS rate = incidence rate of GBS cases (per 100 000 patient years, assuming that each individual in the ONS population estimate was followed for a full year, or in the case of 2021 estimates, for 7 months); ONS = Office of National Statistics population estimates.
For 2021, ONS population estimates were assumed to be the same as for 2020.