Table 3.
Baseline characteristics of the pregnancy episodes in the February 2018 Pregnancy Register
| Episodes with recorded outcome missing N (%) | Conflicting episodes N (%) | All episodes in the Pregnancy Register N (%) |
|
| Number of patients | 643 689 (26.4) | 210 593 (8.6) | 2 438 493 |
| Mean patient follow-up time (years) | 11.92 | 12.92 | 12.93 |
| Mean number of pregnancy episodes per patient | 3.63 | 4.66 | 3.44 |
| Pregnancy end was during UTS follow-up and current registration | 516 818 (55.4) | 160 936 (64.1) | 1 926 077 (33.1) |
| Age group of the patient at the end of the pregnancy episode | |||
| 11–14 | 1344 (0.1) | 76 (0.0) | 7867 (0.1) |
| 15–19 | 72 543 (7.8) | 15 420 (6.1) | 551 025 (9.5) |
| 20–24 | 196 979 (21.1) | 48 273 (19.2) | 1 397 717 (24.0) |
| 25–29 | 254 352 (27.3) | 65 601 (26.1) | 1 624 350 (27.9) |
| 30–34 | 235 995 (25.3) | 69 236 (27.6) | 1 339 439 (23.0) |
| 35–39 | 126 369 (13.6) | 40 079 (16.0) | 685 421 (11.8) |
| 40–44 | 37 640 (4.0) | 11 355 (4.5) | 194 354 (3.3) |
| 45–49 | 7382 (0.8) | 953 (0.4) | 24 208 (0.4) |
| Year pregnancy episode ended | |||
| pre-1950 | 1417 (0.2) | 41 (0.0) | 16 695 (0.3) |
| 1950–1959 | 8061 (0.9) | 522 (0.2) | 98 436 (1.7) |
| 1960–1969 | 19 312 (2.1) | 1887 (0.8) | 283 757 (4.9) |
| 1970–1979 | 24 296 (2.6) | 3882 (1.5) | 493 217 (8.5) |
| 1980–1989 | 38 768 (4.2) | 9135 (3.6) | 803 380 (13.8) |
| 1990–1999 | 248 016 (26.6) | 54 254 (21.6) | 1 530 212 (26.3) |
| 2000–2009 | 336 523 (36.1) | 116 429 (46.4) | 1 705 380 (29.3) |
| 2010–2018 | 256 211 (27.5) | 64 843 (25.8) | 893 304 (15.3) |
| Total pregnancies | 932 604 | 251 026 | 5 824 381 |
UTS, up-to-standard.