TABLE 1.
Characteristics and birth outcomes of pregnant women with a positive SARS‐CoV‐2 PCR test within 7 days prior to admission and up to 2 days after giving birth from March to August 2020 by cause of admission and country.
| BOSS | ItOSS | NethOSS | NOSS | UKOSS | ||
|---|---|---|---|---|---|---|
| National, Belgium | National, Italy | National, the Netherlands | National, Denmark, Finland, Iceland & Norway | Regional, Sweden | National, United Kingdom | |
| Hospital admission, n | ||||||
| COVID‐19‐related admissions | 33 | 153 | 45 | 24 | 29 | 656 |
| Non‐COVID‐19‐related admissions | 265 | 386 | 48 | 32 | 151 | 514 |
| Age ≥35 years, n (%) | ||||||
| COVID‐19‐related admissions | 8 (24.2) | 55 (35.9) | 11 (24.4) | 7 (29.2) | 11 (37.9) | 226 (34.5) |
| Non‐COVID‐19‐related admissions | 53 (20.0) | 119 (31.4) | 16 (33.3) | 9 (28.1) | 51 (33.8) | 130 (25.3) |
| BMI >30 kg/m2, n (%) | ||||||
| COVID‐19‐related admissions | 7 (21.9) | 30 (19.9) a | 11 (28.9) | 8 (33.3) | 9 (34.6) | 213 (33.6) |
| Non‐COVID‐19‐related admissions | 48 (19.5) | 33 (8.7) a | 15 (34.9) | 5 (15.6) | 32 (21.2) | 129 (25.8) |
| Migrant background or BAME ethnicity, n (%) | ||||||
| COVID‐19‐related admissions | NA | 57 (37.3) | 19 (47.5) | 11 (45.8) | 22 (78.6) | 364 (56.1) |
| Non‐COVID‐19‐related admissions | NA | 101 (26.2) | 16 (34.0) | 14 (45.2) | 84 (56.8) | 179 (35.5) |
| Multiparous, n (%) | ||||||
| COVID‐19‐related admissions | 23 (69.7) | 101 (66.4) | 22 (48.9) | 15 (62.5) | 21 (77.8) | 396 (60.6) |
| Non‐COVID‐19‐related admissions | 184 (69.4) | 203 (52.7) | 29 (60.4) | 21 (65.6) | 96 (63.6) | 284 (56.0) |
| Gestational age at infection | ||||||
| First trimester, n (%) | ||||||
| COVID‐19‐related admissions | 0 | 8 (5.3) | 1 (2.2) | 3 (13.0) | 0 | 23 (3.5) |
| Non‐COVID‐19‐related admissions | 2 (0.8) | 2 (0.5) | 2 (4.2) | 1 (3.1) | 0 | 14 (2.7) |
| Second trimester, n (%) | ||||||
| COVID‐19‐related admissions | 12 (36.4) | 24 (15.8) | 13 (28.9) | 6 (26.1) | 5 (20.8) | 107 (16.3) |
| Non‐COVID‐19‐related admissions | 6 (2.3) | 7 (1.9) | 1 (2.1) | 3 (9.4) | 7 (4.7) | 34 (6.6) |
| Third trimester, n (%) | ||||||
| COVID‐19‐related admissions | 21 (63.6) | 120 (78.9) | 31 (68.9) | 14 (60.9) | 21 (87.5) | 526 (80.2) |
| Non‐COVID‐19‐related admissions | 257 (97.0) | 365 (97.6) | 45 (93.8) | 28 (87.5) | 141 (95.3) | 466 (90.7) |
| Cesarean section, n (%) | ||||||
| COVID‐19‐related admissions | 8 (24.2) | 53 (46.1) | 15 (34.9) | 11 (47.8) | 9 (33.3) | 313 (47.7) |
| Non‐COVID‐19‐relatedadmissions | 45 (17.0) | 113 (30.7) | 15 (31.3) | 4 (18.2) | 43 (28.7) | 213 (42.7) |
| Preterm birth (<37 weeks), n (%) | ||||||
| COVID‐19‐related admissions | 1 (3.0) | 20 (17.4) | 8 (18.6) | 5 (21.7) | 3 (12.5) | 136 (20.7) |
| Non‐COVID‐19‐related admissions | 20 (7.6) | 41 (11.5) | 6 (13.3) | 1 (3.3) | 23 (15.5) | 64 (12.7) |
Abbreviations: BAME, black, Asian and minority ethnic; BMI, body mass index; COVID‐19, coronavirus disease 2019; NA, not available.
a
These cases were reported with a check‐box obesity (yes/no), resulting in fewer cases missing than for numerical BMI value.