Nwaru, Bright ITibble, HollyShah, Syed APillinger, RebeccaMclean, SusannahRyan, DermotCritchley, Hilary O DPrice, DavidHawrylowicz, Catherine M.Simpson, Colin R.Soyiri, Ireneous N.Appiagyei, FrancisSheikh, Aziz2020-09-282020-09-282021-01-15Nwaru, B I, Tibble, H, Shah, S A, Pillinger, R, Mclean, S, Ryan, D, Critchley, H O D, Price, D, Hawrylowicz, C M, Simpson, C R, Soyiri, I N, Appiagyei, F & Sheikh, A 2021, 'Hormonal contraception and the risk of severe asthma exacerbation : 17-year population-based cohort study', Thorax, vol. 76, pp. 109-115. https://doi.org/10.1136/thoraxjnl-2020-2155400040-6376ORCID: 0000-0002-2876-6089https://hdl.handle.net/2164/15176FUNDING: This work was supported by Asthma UK, grant number: AUK-IG-2016-346 and Health Data Research UK. We thank Optimum Patient Care (OPC) and Observational and Pragmatic Research Institute Pte Ltd (OPRI) for making the OPCRD database (www.opcrd.co.uk) available free of charge. BN acknowledges the support of Knut and Alice Wallenberg Foundation, the Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, Sweden, and the VBG Group Herman Krefting Foundation on Asthma and Allergy. AS acknowledges support of Health Data Research UK (BREATHE). ACKNOWLEDGEMENTS: We would like to thank Dr Lynn Morrice for administrative assistance and members of the Patient and Public Involvement group of the Asthma UK Centre for Applied Research who helped shape this project during the grant application stage. We also thank Dr Susannah McLean who helped with selection of Read codes and design of strategy for determining start and end dates of pregnancies. We are grateful to Optimum Patient Care (OPC) and Observational and Pragmatic Research Institute Pte Ltd (OPRI) for making the OPCRD database (www.opcrd.co.uk) available free of charge. We also thank Derek Skinner of OPRI who contributed to the creation of the study data-cut, identification of READ codes and IMD Centiles.7859535engAsthma exacerbationwomencombined hormonaloestrogenprogesteronesex hormonesclinical epidemiologyasthmaasthma epidemiologyhormonal contraceptionPROGESTERONELUNG-FUNCTIONREGULATORY TCAREWOMENUKREPLACEMENT THERAPYESTROGENBODY-MASS INDEXEPIDEMIOLOGYR MedicinePulmonary and Respiratory MedicineAsthma UKAUK-IG-2016-346OtherSupplementary DataRJournal article10.1136/thoraxjnl-2020-215540http://www.scopus.com/inward/record.url?scp=85096794701&partnerID=8YFLogxK76