1. Randomized comparison of early supplemental oxygen versus ambient air in patients with confirmed myocardial infarction : Sex-related outcomes from DETO2X-AMI
- Author
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Alfredsson, J., James, S. K., Erlinge, D., Herlitz, Johan, Fröbert, O., Dworeck, C., Redfors, B., Arefalk, G., Östlund, O., Jernberg, T., Mars, K., Haaga, U., Lindahl, B., Swahn, E., Lawesson, S. S., Hofmann, R., and Investigators, for the DETO2X-SWEDEHEART
- Subjects
Male ,Time Factors ,all cause mortality ,medicine.medical_treatment ,treatment indication ,Myocardial Infarction ,clinical outcome ,heart failure ,population ,oxygen therapy ,030204 cardiovascular system & hematology ,law.invention ,cause of death ,0302 clinical medicine ,Randomized controlled trial ,law ,hospital readmission ,Cause of Death ,Oxygen therapy ,dipeptidyl carboxypeptidase inhibitor ,Cardiac and Cardiovascular Systems ,Registries ,030212 general & internal medicine ,Myocardial infarction ,comparative study ,Aged, 80 and over ,oxygen supply ,Kardiologi ,Incidence ,Incidence (epidemiology) ,adult ,Hazard ratio ,beta adrenergic receptor blocking agent ,Middle Aged ,Survival Rate ,aged ,Treatment Outcome ,female ,priority journal ,Cardiology ,Female ,Cardiology and Cardiovascular Medicine ,hospitalization ,medicine.medical_specialty ,sex difference ,Subgroup analysis ,Patient Readmission ,Article ,ticagrelor ,03 medical and health sciences ,male ,Internal medicine ,medicine ,Humans ,follow up ,controlled study ,human ,cardiovascular function ,outcome assessment ,Aged ,Heart Failure ,Sweden ,clopidogrel ,long term care ,ST segment elevation myocardial infarction ,business.industry ,diuretic agent ,Oxygen Inhalation Therapy ,acetylsalicylic acid ,medicine.disease ,major clinical study ,Confidence interval ,oxygen saturation ,prasugrel ,angiotensin receptor antagonist ,acute heart infarction ,calcium channel blocking agent ,Heart failure ,randomized controlled trial ,ambient air ,incidence ,business ,oxygen ,Follow-Up Studies - Abstract
Background The purpose of this study is to investigate the impact of oxygen therapy on cardiovascular outcomes in relation to sex in patients with confirmed myocardial infarction (MI). Methods The DETermination of the role of Oxygen in suspected Acute Myocardial Infarction trial randomized 6,629 patients to oxygen at 6 L/min for 6-12 hours or ambient air. In the present subgroup analysis including 5,010 patients (1,388 women and 3,622 men) with confirmed MI, we report the effect of supplemental oxygen on the composite of all-cause death, rehospitalization with MI, or heart failure at long-term follow-up, stratified according to sex. Results Event rate for the composite endpoint was 18.1% in women allocated to oxygen, compared to 21.4% in women allocated to ambient air (hazard ratio [HR] 0.83, 95% confidence interval [CI] 0.65-1.05). In men, the incidence was 13.6% in patients allocated to oxygen compared to 13.3% in patients allocated to ambient air (HR 1.03, 95% CI 0.86-1.23). No significant interaction in relation to sex was found ( P = .16). Irrespective of allocated treatment, the composite endpoint occurred more often in women compared to men (19.7 vs 13.4%, HR 1.51; 95% CI, 1.30-1.75). After adjustment for age alone, there was no difference between the sexes (HR 1.06, 95% CI 0.91-1.24), which remained consistent after multivariate adjustment. Conclusion Oxygen therapy in normoxemic MI patients did not significantly affect all-cause mortality or rehospitalization for MI or heart failure in women or men. The observed worse outcome in women was explained by differences in baseline characteristics, especially age. (Am Heart J 2021;237:13 & ndash;24.) Funding Agencies|Swedish Research CouncilSwedish Research CouncilEuropean Commission [VR20130307]; Swedish HeartLung FoundationSwedish Heart-Lung Foundation [HLF 2018-0187]; Region Stockholm [K 2017-4577]
- Published
- 2021