Nwaru, Bright I.Shah, Syed A.Tibble, HollyPillinger, RebeccaMcLean, SusannahRyan, DermotCritchley, HilaryHawrylowicz, Catherine M.Simpson, Colin R.Soyiri, Ireneous N.Appiagyei, FrancisPrice, DavidSheikh, Aziz2021-09-172021-09-172021-07Nwaru, B I, Shah, S A, Tibble, H, Pillinger, R, McLean, S, Ryan, D, Critchley, H, Hawrylowicz, C M, Simpson, C R, Soyiri, I N, Appiagyei, F, Price, D & Sheikh, A 2021, 'Hormone Replacement Therapy and Risk of Severe Asthma Exacerbation in Perimenopausal and Postmenopausal Women : 17-Year National Cohort Study', The Journal of Allergy and Clinical Immunology: In Practice, vol. 9, no. 7, pp. 2751-2760.e1. https://doi.org/10.1016/j.jaip.2021.02.0522213-2198RIS: urn:11091543D0452E9C5B05AC386602A198https://hdl.handle.net/2164/17100This 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. B. I. Nwaru 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. A. Sheikh acknowledges support of Health Data Research UK (BREATHE).101160329engAsthma exacerbationCombined hormone therapyEstrogen-only therapyHormone replacement therapyMenopauseWomenCohort studyR MedicineRJournal article10.1016/j.jaip.2021.02.05297