Table 1.
Distribution of characteristics among 1 033 699 women aged 15–45 in Norway who were pregnant between 1 March 2020 and 28 February 2021
| Characteristics |
Women who were pregnant (n = 102 820) |
Women who were not pregnant (n = 930 879) |
|---|---|---|
| Age at start of follow‐up, mean (SD) | 30.8 (5.1) | 30.2 (8.8) |
| Country of birth, n (%) | ||
| Norway | 73 936 (71.9) | 705 553 (75.8) |
| Another Scandinavian country | 2 026 (2.0) | 14 186 (1.5) |
| Outside of Scandinavia | 26 528 (25.8) | 208 193 (22.4) |
| Unknown | 330 (0.3) | 2 947 (0.3) |
| Marital status, n (%) | ||
| Single | 59 163 (57.5) | 636 473 (68.4) |
| Married/registered partner | 39 520 (38.4) | 241 090 (25.9) |
| Other | 4 137 (4.0) | 53 316 (5.7) |
| Educational level, n (%) | ||
| Elementary school | 16 243 (15.8) | 221 684 (23.8) |
| Highschool | 19 416 (18.9) | 230 053 (24.7) |
| Vocational | 1 566 (1.5) | 13 955 (1.5) |
| Up to 4 years of university | 37 289 (36.3) | 272 101 (29.2) |
| More than 4 years of university | 20 049 (19.5) | 102 543 (11.0) |
| Unknown | 8 257 (8.0) | 90 543 (9.7) |
| Household income, n (%) | ||
| 1st tertile (≤500 730 NOK) | 30 241 (29.4) | 304 914 (32.8) |
| 2nd tertile (500 731–846 668 NOK) | 41 219 (40.1) | 293 937 (31.6) |
| 3rd tertile (>846 668 NOK) | 28 081 (27.3) | 307 073 (33.0) |
| Unknown | 3 279 (3.2) | 24 955 (2.7) |
| Chronic conditions, n (%) | ||
| Diabetes | 1 203 (1.2) | 10 365 (1.1) |
| Cerebrovascular disease | 104 (0.1) | 1 339 (0.1) |
| Other chronic cardiovascular disorders | 823 (0.8) | 6 783 (0.7) |
| Immune deficiency | 37 (0.04) | 453 (0.05) |
| Reduced immune function due to medications | 1 566 (1.5) | 14 713 (1.6) |
| Chronic lung disease | 3 505 (3.4) | 36 953 (4.0) |
| Neurological disorders | 93 (0.1) | 2 263 (0.2) |
| Kidney failure | 27 (0.03) | 507 (0.05) |
| Organ transplant | 21 (0.02) | 628 (0.07) |
| Haematological cancer | 95 (0.1) | 1 036 (0.1) |
| Other types of cancer | 94 (0.1) | 2 405 (0.3) |