WEUSRTP4850: Phase II: ICS/LABA Use in Pregnancy and Outcomes

"Fluticasone propionate is an inhaled corticosteroid used for the treatment of asthma, often in combination with the long-acting β-agonist salmeterol. For the primary endpoint, exposure status will be determined based on the individual receiving a prescription for the drug of interest (fluticasone propionate or another inhaled corticosteroid) in the 2 weeks immediately before the LMP date or during the first trimester of pregnancy.~Sensitivity analysis will be carried out categorising exposure based on mapping the duration of prescriptions based on the number of inhalers, number of puffs within an inhaler and the prescribed daily dose."