Table 2.
Estimated incidence of admission with SARS-CoV-2 infection in pregnancy among different population subgroups
| Characteristic | Estimated No of maternities | No of pregnant women admitted with SARS-CoV-2 | Incidence per 1000 maternities | Rate ratio (95% CI) |
|---|---|---|---|---|
| Age*, years: | ||||
| <20 | 2532 | 4 | 1.6 | 0.4 (0.1 to 1.1) |
| 20-34 | 63 768 | 248 | 3.9 | 1 (reference) |
| ≥35 | 19 992 | 175 | 8.8 | 2.3 (1.8 to 2.7) |
| Body mass index†: | ||||
| Normal (<25) | 36 377 | 126 | 3.5 | 1 (reference) |
| Overweight (25 to <30) | 20 836 | 141 | 6.8 | 2.0 (1.5 to 2.5) |
| Obese (≥30) | 16 154 | 140 | 8.7 | 2.5 (2.0 to 3.2) |
| Ethnic group (England only)‡: | ||||
| White | 49 282 | 173 | 3.5 | 1 (reference) |
| Asian | 7400 | 103 | 13.9 | 4.0 (3.1 to 5.1) |
| Black | 3135 | 89 | 28.4 | 8.1 (6.2 to 10.5) |
| Chinese/other | 2960 | 28 | 9.5 | 2.7 (1.7 to 4.0) |
| Mixed | 1304 | 9 | 6.9 | 2.0 (0.9 to 3.8) |
*
Estimated number of maternities based on number of maternities in UK occurring during March and 14/30 of April 2018. Four women with unknown age excluded from denominator.
†
Estimated number of maternities based on number of maternities in GB during March and 14/30 of April in year April 2016 to 31 March 2017. Women with unknown body mass index excluded from both numerator (20) and denominator (12 291).
‡
Estimated number of maternities based on number of maternities in England occurring during March and 14/30 of April 2018. Women with unknown ethnicity excluded from both numerator (10) and denominator (7996).