Table I.
Fertility patterns among women with a registered reproductive outcome between the age of 15–45 years, according to asthma status.
| Total (n = 206 693) | Reference women without asthma (n = 200 248) | Women with asthma (n = 6445) |
|---|---|---|
| Age at index healthcare visit | ||
| <25 | 102 648 (51.3%) | 3976 (61.7%) |
| 25–29 | 45 492 (22.7%) | 1274 (19.8%) |
| 30–34 | 33 770 (16.9%) | 783 (12.1%) |
| 35–39 | 14 882 (7.4%) | 353 (5.5%) |
| 40–45 | 3456 (1.7%) | 59 (0.9%) |
| Approximated age of reproductive start | ||
| <25 | 38 885 (19.4%) | 1456 (22.6%) |
| 25–29 | 60 771 (30.3%) | 2179 (33.8%) |
| 30–34 | 60 187 (30.1%) | 1725 (26.8%) |
| 35–39 | 30 090 (15.0%) | 845 (13.1%) |
| 40–45 | 10 315 (5.2%) | 240 (3.7%) |
| Childbirth | 164 979 (82.4%) | 5329 (82.7%) |
| Age of delivery | ||
| No delivery | 35 269 (17.6%) | 1116 (17.3%) |
| <25 | 84 949 (42.4%) | 3280 (50.9%) |
| 25–29 | 40 183 (20.1%) | 1113 (17.3%) |
| 30–34 | 27 833 (13.9%) | 650 (10.1%) |
| 35–39 | 10 369 (5.2%) | 257 (4.0%) |
| 40–45 | 1645 (0.8%) | 29 (0.4%) |
| Year of delivery | ||
| 1998–2004 | 57 415 (28.7%) | 749 (11.6%) |
| 2005–2009 | 35 652 (17.8%) | 1210 (18.8%) |
| 2010–2014 | 36 886 (18.4%) | 1710 (26.5%) |
| 2015–2019 | 35 026 (17.5%) | 1660 (25.8%) |
| Endometriosis | 393 (0.2%) | 20 (0.3%) |
| PCOS | 1035 (0.5%) | 50 (0.8%) |
| Infertility (diagnosis or treatment)a | 16 220 (8.1%) | 712 (11.0%) |
| With subsequent childbirth | 7599 (3.8%) | 356 (5.5%) |
| Not leading to childbirth | 6672 (3.3%) | 278 (4.3%) |
| Infertility diagnosisb | 14 792 (7.4%) | 642 (10.0%) |
| Unspecified | 8413 (4.2%) | 349 (5.4%) |
| Unexplained after examination | 2155 (1.1%) | 118 (1.8%) |
| Myoma | 99 (0.0%) | 5 (0.1%) |
| Ovarian failure | 211 (0.1%) | 7 (0.1%) |
| Anovulation | 2176 (1.1%) | 88 (1.4%) |
| Tubal factor infertility | 844 (0.4%) | 39 (0.6%) |
| Medically assisted reproductionc | ||
| Ovulation stimulation | 419 (0.2%) | 9 (0.1%) |
| Intrauterine insemination | 596 (0.3%) | 39 (0.6%) |
| Embryo transfer | 43 (0.0%) | 2 (0.0%) |
| In vitro fertilization | 1826 (0.9%) | 87 (1.3%) |
| Intracytoplasmic sperm injection | 1973 (1.0%) | 95 (1.5%) |
| Other treatment | 152 (0.1%) | 7 (0.1%) |
| Pregnancy lossd | 25 119 (12.5%) | 1059 (16.4%) |
| Induced abortion | 35 815 (17.9%) | 1471 (22.8%) |
| Obesity | 13 951 (7.0%) | 1024 (15.9%) |
a
Women having either infertility diagnoses or undergoing medically assisted reproduction.
b
Strict clinical infertility diagnosis, excluding women with polycystic ovary syndrome (PCOS) and endometriosis.
c
Last treatment/procedure registered.
d
Miscarriage, ectopic pregnancy or molar pregnancy.