Percentage of deliveries between 2004 and 2010 restricted to women who received ≥2 prescriptions for an asthma medication in the year before pregnancy, during pregnancy or the year following pregnancy
| An asthma medication prescription during | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of eligible deliveries in entire cohort | Mean maternal age at pregnancy start for entire cohort | One year before pregnancy | Any of the pregnancy trimesters | One year following pregnancy | ||||||||
| Country/region | N | Years | SD* | N | Per cent | (95% CI) | N | Per cent | (95% CI) | N | Per cent | (95% CI) |
| Denmark† | 320 846 | 30.0 | (4.9) | 12 593 | 3.9 | (3.9 to 4.0) | 10 650 | 3.3 | (3.3 to 3.4) | 10 900 | 3.4 | (3.3 to 3.5) |
| Italy—Tuscany | 157 916 | 31.8 | (4.9) | 7551 | 4.8 | (4.7 to 4.9) | 4930 | 3.1 | (3.0 to 3.2) | 7113 | 4.5 | (4.4 to 4.6) |
| Italy—Emilia Romagna | 128 429 | 32.3 | (4.9) | 9895 | 7.7 | (7.6 to 7.9) | 6831 | 5.3 | (5.2 to 5.4) | 9453 | 7.4 | (7.2 to 7.5) |
| Norway‡ | 301 820 | 29.7 | (5.1) | 10 016 | 3.3 | (3.3 to 3.4) | 7908 | 2.6 | (2.6 to 2.7) | 8080 | 2.7 | (2.6 to 2.7) |
| The Netherlands | 14 607 | 30.2 | (4.8) | 751 | 4.9 | (4.6 to 5.2) | 601 | 4.1 | (3.8 to 4.4) | 538 | 3.7 | (3.4 to 4.0) |
| UK* | 182 920 | 30.2 | (6.1) | 14 773 | 8.1 | (8.0 to 8.2) | 14 402 | 7.9 | (7.8 to 8.0) | 14 582 | 8.0 | (7.8 to 8.3) |
| Wales | 58 106 | 27.7 | (6.1) | 4858 | 8.4 | (8.1 to 8.6) | 4617 | 8.0 | (7.7 to 8.2) | 4683 | 8.1 | (3.3 to 3.5) |
| Total across countries | 1 165 435 | |||||||||||
*Excluding Wales to avoid duplication of pregnancies in the Welsh Secure Anonymised Information Linkage (SAIL) Databank.
†2004–2009.
‡2005–2010.
SD, standard deviation.