Background: In people with type 2 diabetes at high risk of cardiovascular or kidney disease, sodium-glucose co-transporter 2 (SGLT2) inhibitors consistently reduce the risk of hospitalisations for heart failure. Less is known about their effects on hospitalisation from any cause, especially in people with type 2 diabetes without atherosclerotic cardiovascular disease, which includes most of the global population of people with type 2 diabetes. We aimed to assess the effect of the SGLT2 inhibitor, dapagliflozin, on the risks of hospitalisations for any cause and for specific causes in people with type 2 diabetes with and without atherosclerotic cardiovascular disease., Methods: The DECLARE-TIMI 58 trial was a double-blind, multicentre, randomised, placebo-controlled study. People with type 2 diabetes and either risk factors for or established atherosclerotic cardiovascular disease were randomly assigned (1:1) to receive oral dapagliflozin 10 mg or placebo once daily. In these post-hoc analyses, the effects of dapagliflozin on risks of first non-elective any-cause and cause-specific hospitalisation were assessed with Cox proportional hazards regression models overall and in the subset of participants without prevalent atherosclerotic cardiovascular disease. The risk of total (first plus subsequent) non-elective hospitalisations was assessed with Lin-Wei-Ying-Yang model. Investigator-reported System Organ Class terms were used to classify cause-specific hospitalisations. The trial is registered with ClinicalTrials.gov, NCT01730534., Findings: Between April 25, 2013, and Sept 18, 2018, 17 160 people (6422 [37·4%] women, 10 738 [62·6%] men; mean age 63·9 years [SD 6·8]) were enrolled in the original trial, of whom 10186 (59·4%) had multiple risk factors for but did not have established atherosclerotic cardiovascular disease, and 6835 (39·8%) had both no evidence of atherosclerotic cardiovascular disease and low KDIGO risk. Over a median follow-up of 4·2 years (IQR 3·9-4·4), dapagliflozin was associated with a lower risk of first non-elective hospitalisation for any cause (2779 [32·4%] of 8582 people in the dapagliflozin group vs 3036 [35·4%] of 8578 people in the placebo group; hazard ratio [HR] 0·89 [95% CI 0·85-0·94]) and total (first plus subsequent) non-elective hospitalisations for any cause (risk ratio 0·92 [95% CI 0·86-0·97]). The association between dapagliflozin use and the risk of first non-elective hospitalisation for any cause was consistent in subgroups of participants with (HR 0·92 [95% CI 0·85-0·99] and without (0·87 [0·81-0·94]) atherosclerotic cardiovascular disease at baseline (p interaction=0·31). Compared with the placebo group, the dapagliflozin group had lower risk of first hospitalisations due to cardiac disorders (HR 0·91 [95% CI 0·84-1·00]), metabolism and nutrition disorders (0·73 [0·60-0·89]), renal and urinary disorders (0·61 [0·49-0·77]), and due to any other cause excluding these three causes (0·90 [0·85-0·96]). Treatment with dapagliflozin was also associated with a lower risk of hospitalisations due to musculoskeletal and connective tissue disorders (HR 0·81 [0·67-0·99]) and infections and infastations (HR 0·86 [0·78-0·96])., Interpretation: Dapagliflozin reduced the risk of first and total non-elective hospitalisations for any cause in people with type 2 diabetes, regardless of the presence of atherosclerotic cardiovascular disease, including hospitalisations not directly attributed to cardiac, kidney, or metabolic causes. These findings might have implications on health-related quality of life for people with type 2 diabetes and on health-care costs attributable this condition., Funding: AstraZeneca., Competing Interests: Declaration of interests MS reports travel support from AstraZeneca and Novo Nordisk paid to Hadassah Medical Center, Jerusalem, Israel. SDW reports grants from AstraZeneca, Bristol-Myers Squibb, Sanofi, and Amgen; grants and personal fees from Arena, Daiichi Sankyo, Eisai, Eli Lilly, and Janssen; grants and consulting fees from Merck; and personal fees from Aegerion, Allergan, AngelMed, Boehringer Ingelheim, Boston Clinical Research Institute, Icon Clinical, Lexicon, St Jude Medical, Xoma, Servier, AstraZeneca, and Bristol-Myers Squibb. SDW's spouse is employed by Merck. IR reports being a member of an advisory board for AstraZeneca, Eli Lilly, Novo Nordisk. Consultancy fees AstraZeneca, Insuline Medical, Concenter BioPharma, and Pluristem; and Speaker's Bureau from AstraZeneca, Eli Lilly and Company, Novo Nordisk, and Sanofi. ELG and SAM are members of the TIMI Study Group, which has received institutional research grant support through Brigham and Women's Hospital from Abbott, Amgen, Anthos Therapeutics, ARCA Biopharma, AstraZeneca, Daiichi-Sankyo, Eisai, Intarcia, Ionis Pharmaceuticals, Janssen Research and Development, MedImmune, Merck, Novartis, Pfizer, Regeneron Pharmaceuticals, Roche, Siemens Healthcare Diagnostics, Softcell Medical, The Medicines Company, and Zora Biosciences. AR and IY report hourly payments from AstraZeneca paid to Hadassah Medical Center and hourly payments from Novo Nordisk. TAZ reports research grants from the Austrian Science Funds and the German Research Foundation, honoraria for serving on advisory boards from Boehringer Ingelheim; personal fees from AstraZeneca, Boehringer Ingelheim, and Sun Pharmaceutical Industries; and educational grants from Eli Lilly. MF, PAJ, IAMG-N, and AML are employees at BioPharmaceuticals Research & Development, AstraZeneca, Gothenburg, Sweden. LAL reports research funding from Astra Zeneca and Lexicon; has provided continuing medical education on behalf of AstraZeneca, Boehringer Ingelheim, Eli Lilly, Merck, Novo Nordisk, Pfizer, and Servier; and has acted as an advisor to AstraZeneca, Boehringer Ingelheim, Eli Lilly, Merck, Novo Nordisk, Pfizer, and Sanofi. DLB reports being a member of an advisory board for from AngioWave, Bayer, Boehringer Ingelheim, Cardax, CellProthera, Cereno Scientific, Elsevier Practice Update Cardiology, High Enroll, Janssen, Level Ex, McKinsey, Medscape Cardiology, Merck, MyoKardia, NirvaMed, Novo Nordisk, PhaseBio, PLx Pharma, Regado Biosciences, and Stasys; is a member of the Board of Directors for AngioWave (with stock options), Boston VA Research Institute, Bristol-Myers Squibb (holds stock), DRS.LINQ (with stock options), High Enroll (holds stock), Society of Cardiovascular Patient Care, and TobeSoft; is the Inaugural Chair of the American Heart Association Quality Oversight Committee; consultantcy fees from Broadview Ventures; is a member of Data Monitoring Committees for Acesion Pharma, Assistance Publique-Hôpitaux de Paris, Baim Institute for Clinical Research (formerly Harvard Clinical Research Institute, for the PORTICO trial, funded by St Jude Medical, now Abbott), Boston Scientific, Cleveland Clinic, Contego Medical, Duke Clinical Research Institute, Mayo Clinic, Mount Sinai School of Medicine, Novartis, Population Health Research Institute; Rutgers University; Honoraria from the American College of Cardiology, Arnold and Porter law firm, Baim Institute for Clinical Research (formerly Harvard Clinical Research Institute), Belvoir Publications, Canadian Medical and Surgical Knowledge Translation Research Group, Cowen and Company, Duke Clinical Research Institute, HMP Global, Journal of the American College of Cardiology, K2P, Level Ex, Medtelligence/ReachMD, MJH Life Sciences, Oakstone CME, Piper Sandler, Population Health Research Institute, Slack Publications, Society of Cardiovascular Patient Care, WebMD, Wiley; is the Deputy Editor of Clinical Cardiology; is the Chair of the NCDR-ACTION Registry Steering Committee; is the Chair of the VA CART Research and Publications Committee; is named on the patent for sotagliflozin, which is assigned to Brigham and Women's Hospital who assigned to Lexicon (neither DLB nor Brigham and Women's Hospital receive any income from this patent); research funding from Abbott, Acesion Pharma, Afimmune, Aker Biomarine, Amarin, Amgen, AstraZeneca, Bayer, Beren, Boehringer Ingelheim, Boston Scientific, Bristol-Myers Squibb, Cardax, CellProthera, Cereno Scientific, Chiesi, CinCor, CSL Behring, Eisai, Ethicon, Faraday Pharmaceuticals, Ferring Pharmaceuticals, Forest Laboratories, Fractyl, Garmin, HLS Therapeutics, Idorsia, Ironwood, Ischemix, Janssen, Javelin, Lexicon, Lilly, Medtronic, Merck, Moderna, MyoKardia, NirvaMed, Novartis, Novo Nordisk, Owkin, Pfizer, PhaseBio, PLx Pharma, Recardio, Regeneron, Reid Hoffman Foundation, Roche, Sanofi, Stasys, Synaptic, The Medicines Company, Youngene, and 89Bio; royalties from Elsevier; is a site coinvestigator for Abbott, Biotronik, Boston Scientific, CSI, Endotronix, St Jude Medical (now Abbott), Philips, SpectraWAVE, Svelte, Vascular Solutions; is a trustee of the American College of Cardiology; and has done unfunded research for FlowCo and Takeda. DKM reports research support for Clinical Trials Leadership from Boehringer Ingelheim, Sanofi, Merck, Pfizer, AstraZeneca, Novo Nordisk, Esperion, Lilly USA, Lexicon, and CSL Behring; and honoraria for consultancy from Lilly USA, Boehringer Ingelheim, Merck, Novo Nordisk, Applied Therapeutics, Metavant, Sanofi, Altimmune and Intercept Pharma, CSL Behring, Bayer, and GlaxoSmithKline. JPHW reports consultancy and speaking engagements contracted via the University of Liverpool, Liverpool, UK (no personal payment) from Alnylam, AstraZeneca, Boehringer Ingelheim, Janssen Pharmaceuticals, Eli Lilly, Napp, Novo Nordisk, Mundipharma, Pfizer, Rhythm Pharmaceuticals, Saniona, and Ysopia; grants paid to the University of Liverpool from AstraZeneca and Novo Nordisk; and honoraria and lecture fees (personal) from AstraZeneca, Boehringer Ingelheim, Merck, Napp, Novo Nordisk, Mundipharma, Sanofi, and Takeda. AC reports grants and personal fees from AstraZeneca and Novo Nordisk and personal fees from Boehringer Ingelheim, Eli Lilly, Sanofi, Pfizer, and Medial Early-Sign. MSS reports grants and consulting fees from Amgen, AstraZeneca, Intarcia, Janssen Research & Development, Medicines Company, MedImmune, Merck, and Novartis; consulting fees from Anthos Therapeutics, Bristol-Myers Squibb, CVS Caremark, DalCor, Dyrnamix, Esperion, IFM Therapeutics, and Ionis; and grants from Bayer, Daiichi-Sankyo, Eisai, GlaxoSmithKline, Pfizer, Poxel, Quark Pharmaceuticals, and Takeda; MSS is a member of the TIMI Study Group, which has also received institutional research grant support through Brigham and Women's Hospital from Abbott, Aralez, Roche, and Zora Biosciences. OM reports being a member of an advisory board for Novo Nordisk, Eli Lilly, Sanofi, Merck Sharp & Dohme, Boehringer Ingelheim, Bayer, AstraZeneca; research grant support paid to Hadassah Hebrew University Hospital from Novo Nordisk, AstraZeneca; and Speaker's Bureau from AstraZeneca, Novo Nordisk, Eli Lilly, Sanofi, Merck Sharp & Dohme, and Boehringer Ingelheim., (Copyright © 2023 Elsevier Ltd. All rights reserved.)