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Vaccaro O, Masulli M, Nicolucci A, Bonora E, Del Prato S, Maggioni AP, Rivellese AA, Squatrito S, Giorda CB, Sesti G, Mocarelli P, Lucisano G, Sacco M, Signorini S, Cappellini F, Perriello G, Babini AC, Lapolla A, Gregori G, Giordano C, Corsi L, Buzzetti R, Clemente G, Di Cianni G, Iannarelli R, Cordera R, La Macchia O, Zamboni C, Scaranna C, Boemi M, Iovine C, Lauro D, Leotta S, Dall'Aglio E, Cannarsa E, Tonutti L, Pugliese G, Bossi AC, Anichini R, Dotta F, Di Benedetto A, Citro G, Antenucci D, Ricci L, Giorgino F, Santini C, Gnasso A, De Cosmo S, Zavaroni D, Vedovato M, Consoli A, Calabrese M, di Bartolo P, Fornengo P, Riccardi G. Effects on the incidence of cardiovascular events of the addition of pioglitazone versus sulfonylureas in patients with type 2 diabetes inadequately controlled with metformin (TOSCA.IT): a randomised, multicentre trial. Lancet Diabetes Endocrinol 2017; 5:887-897. [PMID: 28917544 DOI: 10.1016/s2213-8587(17)30317-0] [Citation(s) in RCA: 183] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 08/29/2017] [Accepted: 08/29/2017] [Indexed: 12/24/2022]
Abstract
BACKGROUND The best treatment option for patients with type 2 diabetes in whom treatment with metformin alone fails to achieve adequate glycaemic control is debated. We aimed to compare the long-term effects of pioglitazone versus sulfonylureas, given in addition to metformin, on cardiovascular events in patients with type 2 diabetes. METHODS TOSCA.IT was a multicentre, randomised, pragmatic clinical trial, in which patients aged 50-75 years with type 2 diabetes inadequately controlled with metformin monotherapy (2-3 g per day) were recruited from 57 diabetes clinics in Italy. Patients were randomly assigned (1:1), by permuted blocks randomisation (block size 10), stratified by site and previous cardiovascular events, to add-on pioglitazone (15-45 mg) or a sulfonylurea (5-15 mg glibenclamide, 2-6 mg glimepiride, or 30-120 mg gliclazide, in accordance with local practice). The trial was unblinded, but event adjudicators were unaware of treatment assignment. The primary outcome, assessed with a Cox proportional-hazards model, was a composite of first occurrence of all-cause death, non-fatal myocardial infarction, non-fatal stroke, or urgent coronary revascularisation, assessed in the modified intention-to-treat population (all randomly assigned participants with baseline data available and without any protocol violations in relation to inclusion or exclusion criteria). This study is registered with ClinicalTrials.gov, number NCT00700856. FINDINGS Between Sept 18, 2008, and Jan 15, 2014, 3028 patients were randomly assigned and included in the analyses. 1535 were assigned to pioglitazone and 1493 to sulfonylureas (glibenclamide 24 [2%], glimepiride 723 [48%], gliclazide 745 [50%]). At baseline, 335 (11%) participants had a previous cardiovascular event. The study was stopped early on the basis of a futility analysis after a median follow-up of 57·3 months. The primary outcome occurred in 105 patients (1·5 per 100 person-years) who were given pioglitazone and 108 (1·5 per 100 person-years) who were given sulfonylureas (hazard ratio 0·96, 95% CI 0·74-1·26, p=0·79). Fewer patients had hypoglycaemias in the pioglitazone group than in the sulfonylureas group (148 [10%] vs 508 [34%], p<0·0001). Moderate weight gain (less than 2 kg, on average) occurred in both groups. Rates of heart failure, bladder cancer, and fractures were not significantly different between treatment groups. INTERPRETATION In this long-term, pragmatic trial, incidence of cardiovascular events was similar with sulfonylureas (mostly glimepiride and gliclazide) and pioglitazone as add-on treatments to metformin. Both of these widely available and affordable treatments are suitable options with respect to efficacy and adverse events, although pioglitazone was associated with fewer hypoglycaemia events. FUNDING Italian Medicines Agency, Diabete Ricerca, and Italian Diabetes Society.
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Affiliation(s)
- Olga Vaccaro
- Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy.
| | - Maria Masulli
- Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy
| | - Antonio Nicolucci
- Center for Outcomes Research and Clinical Epidemiology (CORESEARCH), Pescara, Italy
| | - Enzo Bonora
- Division of Endocrinology, Diabetes and Metabolism, University and Hospital Trust of Verona, Verona, Italy
| | - Stefano Del Prato
- Department of Clinical & Experimental Medicine, University of Pisa, Pisa, Italy
| | - Aldo P Maggioni
- National Association of Hospital Cardiologists (ANMCO) Research Center, Florence, Italy
| | - Angela A Rivellese
- Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy
| | | | - Carlo B Giorda
- Diabetes Unit, Azienda Sanitaria Locale (ASL) Torino 5, Torino, Italy
| | - Giorgio Sesti
- Department of Medical and Surgical Sciences, Magna Graecia University of Catanzaro, Italy
| | - Paolo Mocarelli
- University Department Laboratory Medicine, Hospital of Desio, Monza, Italy
| | - Giuseppe Lucisano
- Center for Outcomes Research and Clinical Epidemiology (CORESEARCH), Pescara, Italy
| | - Michele Sacco
- Center for Outcomes Research and Clinical Epidemiology (CORESEARCH), Pescara, Italy
| | - Stefano Signorini
- University Department Laboratory Medicine, Hospital of Desio, Monza, Italy
| | | | | | | | | | - Giovanna Gregori
- Diabetes Unit, Massa Carrara, Azienda Unità Sanitarie Locali (USL) Toscana Nord Ovest, Carrara, Italy
| | - Carla Giordano
- Section of Endocrinology, Diabetology and Metabolic Diseases, University of Palermo, Palermo, Italy
| | - Laura Corsi
- Diabetes Unit, ASL 4 Chiavarese, Chiavari, Italy
| | | | - Gennaro Clemente
- Institute for Research on Population and Social Policies-National Research Council, Penta di Fisciano, Italy
| | | | - Rossella Iannarelli
- Diabetes Unit, Department of Medicine, San Salvatore Hospital, L'Aquila, Italy
| | - Renzo Cordera
- Diabetes Unit, School of Medicine, University of Genova, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) San Martino Hospital, Genova, Italy
| | - Olga La Macchia
- Endocrinology, Azienda Ospedaliero Universitaria Ospedali Riuniti, Foggia, Italy
| | | | - Cristiana Scaranna
- Endocrinology and Diabetology, Azienda Socio Sanitaria Territoriale (ASST) Papa Giovanni XXIII, Bergamo, Italy
| | - Massimo Boemi
- Diabetes and Metabolism Unit, IRCCS Istituto Nazionale Riposo e Cura Anziani, Ancona, Italy
| | - Ciro Iovine
- Diabetes Unit, University of Naples Federico II, Naples, Italy
| | - Davide Lauro
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Sergio Leotta
- UOC Diabetologia Ospedale Sandro Pertini, Rome, Italy
| | | | | | - Laura Tonutti
- Endocrinology, Diabetes, Metabolism and Clinical Nutrition Unit, Azienda Sanitaria Universitaria Integrata di Udine, Udine, Italy
| | - Giuseppe Pugliese
- Department of Clinical and Molecular Medicine, Sapienza University, Rome, Italy
| | | | | | - Francesco Dotta
- Diabetes Unit, Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Antonino Di Benedetto
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Giuseppe Citro
- Endocrinology and Diabetes Unit, Azienda Sanitaria Locale di Potenza, Potenza, Italy
| | | | | | - Francesco Giorgino
- Department of Emergency and Organ Transplantation, Endocrinology and Metabolic Diseases, University of Bari Aldo Moro, Bari, Apulia, Italy
| | - Costanza Santini
- Department Endocrinology and Diabetology, Cesena Hospital, Cesena, Italy
| | - Agostino Gnasso
- Department of Clinical and Experimental Medicine, Magna Graecia University of Catanzaro, Italy
| | - Salvatore De Cosmo
- Unit of Internal Medicine, IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | | | - Monica Vedovato
- Metabolism Unit, Azienda Ospedaliera di Padova, Padova, Italy
| | - Agostino Consoli
- Department of Medicine and Aging Sciences, and Aging and Translational Medicine Research Center (CeSI-Met), D'Annunzio University, Chieti-Pescara, Italy
| | | | - Paolo di Bartolo
- Diabetes Unit, Ravenna Internal Medicine Department, Romagna Local Health Unit, Ravenna, Italy
| | - Paolo Fornengo
- Department of Medical Sciences, University of Turin, Turin, Italy
| | - Gabriele Riccardi
- Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy
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