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Evans M, Engberg S, Faurby M, Fernandes JDDR, Hudson P, Polonsky W. Adherence to and persistence with antidiabetic medications and associations with clinical and economic outcomes in people with type 2 diabetes mellitus: A systematic literature review. Diabetes Obes Metab 2022; 24:377-390. [PMID: 34779107 PMCID: PMC9299643 DOI: 10.1111/dom.14603] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/21/2021] [Accepted: 10/31/2021] [Indexed: 12/28/2022]
Abstract
We designed a systematic literature review to identify available evidence on adherence to and persistence with antidiabetic medication in people with type 2 diabetes (T2D). Electronic screening and congress searches identified real-world noninterventional studies (published between 2010 and October 2020) reporting estimates of adherence to and persistence with antidiabetic medication in adults with T2D, and associations with glycaemic control, microvascular and/or macrovascular complications, hospitalizations and healthcare costs. Ninety-two relevant studies were identified, the majority of which were retrospective and reported US data. The proportions of patients considered adherent (median [range] 51.2% [9.4%-84.3%]) or persistent (median [range] 47.7% [16.9%-94.0%]) varied widely across studies. Multiple studies reported an association between greater adherence/persistence and greater reductions in glycated haemoglobin levels. Better adherence/persistence was associated with fewer microvascular and/or macrovascular outcomes, although there was little consistency across studies in terms of which outcomes were improved. More adherent and more persistent patients were typically less likely to be hospitalized or to have emergency department visits/admissions and spent fewer days in hospital annually than less adherent/persistent patients. Greater adherence and persistence were generally associated with lower hospitalization costs, higher pharmacy costs and lower or budget-neutral total healthcare costs compared with lower adherence/persistence. In conclusion, better adherence and persistence in people with T2D is associated with lower rates of microvascular and/or macrovascular outcomes and inpatient hospitalization, and lower or budget-neutral total healthcare expenditure. Education and treatment strategies to address suboptimal adherence and persistence are needed to improve clinical and economic outcomes.
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Affiliation(s)
- Marc Evans
- Department of Diabetes and EndocrinologyUniversity Hospital LlandoughPenarthUK
| | | | | | | | | | - William Polonsky
- Behavioral Diabetes InstituteSan DiegoCaliforniaUSA
- Department of MedicineUniversity of CaliforniaSan DiegoCaliforniaUSA
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Chan JCN, Gagliardino JJ, Ilkova H, Lavalle F, Ramachandran A, Mbanya JC, Shestakova M, Dessapt-Baradez C, Chantelot JM, Aschner P. One in Seven Insulin-Treated Patients in Developing Countries Reported Poor Persistence with Insulin Therapy: Real World Evidence from the Cross-Sectional International Diabetes Management Practices Study (IDMPS). Adv Ther 2021; 38:3281-3298. [PMID: 33978906 PMCID: PMC8189989 DOI: 10.1007/s12325-021-01736-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 03/30/2021] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Although poor adherence to insulin is widely recognised, periodic discontinuation of insulin may cause more severe hyperglycaemia than poor adherence. We assessed persistence with insulin therapy in patients with type 1 (T1D) or type 2 diabetes (T2D) in developing countries and the reasons for insulin discontinuation. METHODS The International Diabetes Management Practices Study collected real-world data from developing countries in seven waves between 2005 and 2017. In Wave 7 (2016-2017), we asked adult patients with T1D and insulin-treated T2D to report whether they had ever discontinued insulin, the estimated duration of discontinuation and underlying reasons. RESULTS Among 8303 patients recruited from 24 countries by 620 physicians, 4596 were insulin-treated (T1D: 2000; T2D: 2596). In patients with T1D, 14.0% (95% CI: 12.5-15.6) reported having self-discontinued insulin for a median duration of 1.0 month (IQR: 0.5, 3.5). The respective figures in patients with T2D were 13.7% (12.4-15.1) and 2.0 months (IQR: 1.0, 6.0). The main reasons for discontinuation were impact on social life (T1D: 41.0%; T2D: 30.5%), cost of medications and test strips (T1D: 34.4%; T2D: 24.5%), fear of hypoglycaemia (T1D: 26.7%; T2D: 28.0%) and lack of support (T1D: 26.4%; T2D: 25.9%). Other factors included age < 40 years, non-university education and short disease duration (T1D: ≤ 1 year; T2D: > 1-≤ 5 years). Patients with T1D who did not perform self-monitoring of blood glucose (SMBG) or self-adjust their insulin dosage, and patients with T1D or T2D without glucose meters were less likely to persist with insulin. Nearly 50% of patients who reported poor persistence had HbA1c > 75 mmol/mol (> 9%) and > 50% of physicians recommended diabetes education programmes to improve treatment persistence. CONCLUSION In developing countries, poor persistence with insulin is common among insulin-treated patients, supporting calls for urgent actions to ensure easy access to insulin, tools for SMBG and education.
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Affiliation(s)
- Juliana C N Chan
- Department of Medicine and Therapeutics, Hong Kong Institute of Diabetes and Obesity and Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, The Prince of Wales Hospital, Shatin, Hong Kong SAR, China.
| | - Juan José Gagliardino
- CENEXA, Center of Experimental and Applied Endocrinology (La Plata National University-La Plata National Scientific and Technical Research Council), La Plata, Argentina
| | - Hasan Ilkova
- Division of Endocrinology Metabolism and Diabetes, Department of Internal Medicine, Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Fernando Lavalle
- Facultad de Medicina de la Universidad Autónoma de Nuevo León, Monterrey, Mexico
| | - Ambady Ramachandran
- India Diabetes Research Foundation, Dr. A. Ramachandran's Diabetes Hospitals, Chennai, India
| | - Jean Claude Mbanya
- Biotechnology Center, Doctoral School of Life Sciences, Health and Environment, Faculty of Medicine and Biomedical Sciences, University of Yaounde I, Yaounde, Cameroon
| | - Marina Shestakova
- Endocrinology Research Center, Moscow, Russia
- I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | | | | | - Pablo Aschner
- Javeriana University School of Medicine, Bogotá, Colombia
- San Ignacio University Hospital, Bogotá, Colombia
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Stegbauer C, Falivena C, Moreno A, Hentschel A, Rosenmöller M, Heise T, Szecsenyi J, Schliess F. Costs and its drivers for diabetes mellitus type 2 patients in France and Germany: a systematic review of economic studies. BMC Health Serv Res 2020; 20:1043. [PMID: 33198734 PMCID: PMC7667793 DOI: 10.1186/s12913-020-05897-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 11/03/2020] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Type 2 diabetes represents an increasingly critical challenge for health policy worldwide. It absorbs massive resources from both patients and national economies to sustain direct costs of the treatment of type 2 diabetes and its complications and indirect costs related to work loss and wages. More recently, there are innovations based on remote control and personalised programs that promise a more cost-effective diabetes management while reducing diabetes-related complications. In such a context, this work attempts to update cost analysis reviews on type 2 diabetes, focusing on France and Germany, in order to explore most significant cost drivers and cost-saving opportunities through innovations in diabetes care. Although both countries approach care delivery differently, France and Germany represent the primary European markets for diabetes technologies. METHODS A systematic review of the literature listed in MEDLINE, Embase and EconLit has been carried out. It covered interventional, observational and modelling studies on expenditures for type 2 diabetes management in France or Germany published since 2012. Included articles were analysed for annual direct, associated and indirect costs of type 2 diabetes patients. An appraisal of study quality was performed. Results were summarised narratively. RESULTS From 1260 records, the final sample was composed of 24 papers selected according to predefined inclusion/exclusion criteria. Both France and Germany revealed a predominant focus on direct costs. Comparability was limited due to different study populations and cost categories used. Indirect costs were only available in Germany. According to prior literature, reported cost drivers are hospitalisation, prescriptions, higher HbA1c and BMI, treatment with insulin and complications, all indicators of disease severity. The diversity of available data and included costs limits the results and may explain the differences found. CONCLUSIONS Complication prevention and glycaemic control are widely recognized as the most effective ways to control diabetes treatment costs. The value propositions of self-based supports, such as hybrid closed-loop metabolic systems, already implemented in type 1 diabetes management, are the key points for further debates and policymaking, which should involve the perspectives of caregivers, patients and payers.
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Affiliation(s)
- Constance Stegbauer
- aQua Institute for Applied Quality Improvement and Research in Health Care GmbH, Maschmühlenweg 8-10, 37073, Göttingen, Lower Saxony, Germany.
| | - Camilla Falivena
- Health & Not for Profit Division, CERGAS, SDA Bocconi School of Management Governments, Via Sarfatti, 10, Milan, 20136, Italy
| | - Ariadna Moreno
- CRHIM - Center for Research in Healthcare Innovation Management, IESE Business School - University of Navarra, C. d'Arnús i de Garí, 3-7, Barcelona, 08034, Catalonia, Spain
| | - Anna Hentschel
- aQua Institute for Applied Quality Improvement and Research in Health Care GmbH, Maschmühlenweg 8-10, 37073, Göttingen, Lower Saxony, Germany
| | - Magda Rosenmöller
- CRHIM - Center for Research in Healthcare Innovation Management, IESE Business School - University of Navarra, C. d'Arnús i de Garí, 3-7, Barcelona, 08034, Catalonia, Spain
| | - Tim Heise
- Profil, Hellersbergstr. 9, Neuss, 41460, North Rhine-Westphalia, Germany
| | - Joachim Szecsenyi
- aQua Institute for Applied Quality Improvement and Research in Health Care GmbH, Maschmühlenweg 8-10, 37073, Göttingen, Lower Saxony, Germany
| | - Freimut Schliess
- Profil, Hellersbergstr. 9, Neuss, 41460, North Rhine-Westphalia, Germany
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Initial Therapy, Regimen Change, and Persistence in a Spanish Cohort of Newly Treated Type 2 Diabetes Patients: A Retrospective, Observational Study Using Real-World Data. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17103742. [PMID: 32466267 PMCID: PMC7277774 DOI: 10.3390/ijerph17103742] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/18/2020] [Accepted: 05/20/2020] [Indexed: 12/18/2022]
Abstract
The World Health Organization considers the non-adherence to medication a significant issue with global impact, especially in chronic conditions such as type 2 diabetes. We aim to study antidiabetic treatment initiation, add-on, treatment switching, and medication persistence. We conducted an observational study on 4247 individuals initiating antidiabetic treatment between 2013 and 2014 in the EpiChron Cohort (Spain). We used Cox regression models to estimate the likelihood of non-persistence after a one-year follow-up, expressed as hazard ratios (HRs). Metformin was the most frequently used first-line antidiabetic (80% of cases); combination treatment was the second most common treatment in adults aged 40–79 years, while dipeptidyl peptidase-4 inhibitors were the second most common in individuals in their 80s and over, and in patients with renal disease. Individuals initiated on metformin were less likely to present addition and switching events compared with any other antidiabetic. Almost 70% of individuals initiated on monotherapy were persistent. Subjects aged 40 and over (HR 0.53–0.63), living in rural (HR 0.79) or more deprived areas (HR 0.77–0.82), or receiving polypharmacy (HR 0.84), were less likely to show discontinuation. Our findings could help identify the population at risk of discontinuation, and offer them closer monitoring for proper integrated management to improve prognosis and health outcomes.
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Pscherer S, Anderten H, Pfohl M, Fritsche A, Borck A, Pegelow K, Bramlage P, Seufert J. Titration of insulin glargine 100 U/mL when added to oral antidiabetic drugs in patients with type 2 diabetes: results of the TOP-1 real-world study. Acta Diabetol 2020; 57:89-99. [PMID: 31342163 DOI: 10.1007/s00592-019-01383-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Accepted: 06/21/2019] [Indexed: 10/26/2022]
Abstract
AIMS Adequate insulin titration is crucial for optimal glycaemic control in type 2 diabetes (T2D). We aimed to explore the factors and outcomes associated with titration of glargine 100 U/mL (Gla-100) in patients uncontrolled on oral antidiabetic drugs (OAD) and initiating insulin therapy. METHODS Patients from the Titration and Optimization (TOP)-1 registry were stratified by the magnitude of Gla-100 up-titration during the first month (no [< 1 Units (U)/day (d)], minimal [≥ 1 and < 5 U/d], moderate [≥ 5 and ≤ 8 U/d] and strong [> 8 U/d]). The primary endpoint was a fasting blood glucose (FBG) ≤ 110 mg/dL on ≥ 2 occasions and/or individual HbA1c target by 12 months. RESULTS Of 2308 patients, 905, 715, 409 and 279 underwent no, minimal, moderate and strong titration, respectively. Age decreased across increasing titration groups (p = 0.02) while body mass index (BMI) (p < 0.0001), FBG (p < 0.0001), and HbA1c (p < 0.0001) increased. At 12 months, the proportions of patients achieving the primary endpoint were comparable across groups (66.1% overall), though a smaller proportion of no titration patients met both their individual HbA1c target and FBG ≤ 110 mg/dL compared to moderate and strong titration patients (20.1% vs. 27.2% and 26.2%, p = 0.033 and 0.023, respectively). HbA1c was also comparable, though FBG was higher in the no titration group (126.2 vs. 122.6, 121.5 and 120.9 mg/dL, p < 0.02). A similar, small reduction in body weight occurred in all groups; hypoglycaemia rates were comparable across groups. CONCLUSIONS In real-world, titration of Gla-100 during the first month appears to coincide with a number of baseline factors. Insulin dose to meet HbA1c and FBG targets remains suboptimal in the majority of T2D patients.
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Affiliation(s)
- Stefan Pscherer
- Klinik für Innere Medizin III, Sophien-und Hufeland-Klinikum, Henry-van-de-Velde-Straße 2, Weimar, Germany.
| | - Helmut Anderten
- Gemeinschaftspraxis Anderten-Krok & Partner, Hildesheim, Germany
| | - Martin Pfohl
- Medizinische Klinik I, Evang. Bethesda-Krankenhaus, Duisburg, Germany
| | - Andreas Fritsche
- Klinik für Innere Medizin IV, Universitätsklinikum Tübingen, Tübingen, Germany
| | - Anja Borck
- Sanofi-Aventis Deutschland GmbH, Berlin, Germany
| | | | - Peter Bramlage
- Institut für Pharmakologie und Präventive Medizin, Mahlow, Germany
| | - Jochen Seufert
- Klinik für Innere Medizin II, Universitätsklinikum Freiburg, Freiburg, Germany
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Hamersky CM, Fridman M, Gamble CL, Iyer NN. Injectable Antihyperglycemics: A Systematic Review and Critical Analysis of the Literature on Adherence, Persistence, and Health Outcomes. Diabetes Ther 2019; 10:865-890. [PMID: 31054132 PMCID: PMC6531561 DOI: 10.1007/s13300-019-0617-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Indexed: 12/25/2022] Open
Abstract
INTRODUCTION Improving real-world medication adherence to injectable antihyperglycemics in type 2 diabetes mellitus (T2DM) is a clinical challenge. Quantification of the level of adherence required to achieve a minimal clinically important difference (MCID) in glycemic control would assist in meeting this goal. The study objective was to review the literature regarding the relationships of medication adherence and persistence with health outcomes in adult T2DM patients using injectable antihyperglycemics. METHODS Systematic searches were conducted using electronic databases to identify publications over the last decade. Publications were screened against established eligibility criteria. Study data were extracted, evaluated, and used to identify strengths, limitations, and gaps in current evidence. RESULTS Eligibility criteria were met by 38 studies, and this report analyzed 34 studies related to glycemic control (n = 25), healthcare resource use (n = 9), and healthcare costs (n = 14). Eight of these studies examined adherence to glucagon-like peptide-1 receptor agonists (GLP-1 RA), including 1 study regarding adherence to GLP-1 RA or to insulin, and 1 study investigating a GLP-1 RA/insulin combination; the remaining studies involved insulin. Studies used a broad range of measures to classify adherence and persistence, and most measures were unable to reliably evaluate the complexities of patient behavior over time. Better adherence to injectable antihyperglycemic medications was generally found to be associated with improved glycemic control, although no studies attempted to identify a MCID. Although higher diabetes-related pharmacy and total healthcare costs were reported for adherent or persistent patients, these patients tended to have lower diabetes-related and all-cause medical costs. CONCLUSION Results of this review confirmed the effectiveness of injectable antihyperglycemic medications for glycemic control, suggesting that there are clinical and financial consequences to nonadherence. Although attempts were made to quantify the effects of nonadherence, the interpretation of study results was limited by the lack of a MCID and inadequate study design. FUNDING Novo Nordisk, Inc., Plainsboro Township, NJ, USA. Plain language summary available for this article.
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Guerci B, Chanan N, Kaur S, Jasso-Mosqueda JG, Lew E. Lack of Treatment Persistence and Treatment Nonadherence as Barriers to Glycaemic Control in Patients with Type 2 Diabetes. Diabetes Ther 2019; 10:437-449. [PMID: 30850934 PMCID: PMC6437240 DOI: 10.1007/s13300-019-0590-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Indexed: 01/01/2023] Open
Abstract
Treatment persistence (continuing to take medication for the prescribed period) and treatment adherence (complying with the prescription in terms of drug schedules and dosage) are both important when treating chronic diseases such as type 2 diabetes (T2D). They can be indicators of patient satisfaction with treatment. In T2D, the achievement of optimal outcomes requires both persistence with and adherence to prescribed therapy. Poor persistence with and adherence to T2D medication can have profound consequences for the patient, including non-achievement of glycaemic goals and an increased risk of long-term complications and mortality. Therefore, poor treatment persistence and adherence may also have economic consequences, including increased healthcare resource utilization and healthcare costs. Treatment persistence and adherence are affected by several factors, including the mode of administration, administration frequency/regimen complexity, and patient expectations. The aims of this review are as follows: to provide an overview of persistence with and adherence to different antidiabetes therapies for patients with T2D in the real-world setting; examine factors contributing to poor treatment persistence and adherence; and assess available data on the impact of poor treatment persistence and/or adherence on clinical and economic outcomes. Numerous potential targets for improving treatment persistence and/or adherence are identified, including developing less complex treatment regimens with lower pill burdens or less frequent injections, improving the convenience of drug-delivery systems, such as the use of insulin pen devices rather than the conventional vial and syringe, and developing therapies with an improved safety profile to alleviate patient fears of adverse effects, such as weight gain and risk of hypoglycaemia.Funding: Sanofi.
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Affiliation(s)
- Bruno Guerci
- Brabois Hospital and CIC INSERM ILCV, University Hospital of Nancy, Vandoeuvre Lès Nancy, France.
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Drummond R, Baru A, Dutkiewicz M, Basse A, Tengmark BO. Physicians' real-world experience with IDegLira: results of a European survey. BMJ Open Diabetes Res Care 2018; 6:e000531. [PMID: 29942526 PMCID: PMC6014227 DOI: 10.1136/bmjdrc-2018-000531] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 05/15/2018] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE This study aimed to build on the current clinical findings and investigate physicians' experiences and level of satisfaction in using insulin degludec/liraglutide (IDegLira) to treat patients with type 2 diabetes (T2D). RESEARCH DESIGN AND METHODS This multicountry, European online survey included respondents from primary (n=132) and secondary (n=103) care and examined physicians' use, confidence and satisfaction with IDegLira. To standardize responses, 24 of 28 questions pertained to an 'average patient' with T2D who has no major comorbidities, aged 35-70 years, with average cognitive ability/normal mental status and body mass index ≥25 kg/m2. RESULTS The majority (70%) of respondents prescribe IDegLira in the same visit they first mention it, with uncontrolled glycated hemoglobin (HbA1c) (44%) and weight gain (22%) being the most common reasons. On average, physicians reported that patients weighed 95 kg and the HbA1c level was 9.0% at initiation. Physicians also reported the average HbA1c target set was 7.1%; 76% of patients achieved their target. On average, patients achieved their HbA1c target in <6 months, and the average dose of IDegLira in patients in glycemic control was 28 dose steps. Respondents were more satisfied with IDegLira than basal-bolus therapy across all parameters assessed, including reaching HbA1c targets (59%), number of injections (77%) and avoiding weight gain (84%). Correspondingly, 77% of physicians reported that IDegLira had more potential to improve patient motivation compared with basal-bolus to reach target blood glucose levels. CONCLUSIONS Real-world experience of IDegLira is consistent with previous trials/studies, with no major differences between primary and secondary care. Importantly, the majority of respondents were more/much more satisfied with IDegLira than with basal-bolus therapy.
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Affiliation(s)
- Russell Drummond
- Department of Diabetes, Endocrinology and Clinical Pharmacology, Glasgow Royal Infirmary, Glasgow, UK
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Kennedy-Martin T, Boye KS, Peng X. Cost of medication adherence and persistence in type 2 diabetes mellitus: a literature review. Patient Prefer Adherence 2017; 11:1103-1117. [PMID: 28721024 PMCID: PMC5501621 DOI: 10.2147/ppa.s136639] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
PURPOSE To explore published evidence on health care costs associated with adherence or persistence to antidiabetes medications in adults with type 2 diabetes mellitus (T2DM). METHODS Primary research studies published between January 2006 and December 2015 on compliance, adherence, or persistence and treatment in patients with T2DM that document a link with health care costs were identified through literature searches in bibliographic databases and 2015 abstract books for relevant DM congresses. Results were assessed for relevance by two reviewers. The review was part of a larger overview evaluating the impact of adherence and persistence on a range of clinical and economic outcomes; only findings from the cost element are reported herein. RESULTS A total of 4,662 de-duplicated abstracts were identified and 110 studies included in the wider review. Of these, 19 reported an association between adherence (n=13), persistence (n=5), or adherence and persistence (n=1), and health care costs. All studies were retrospective, with sample sizes ranging from 301 to 740,195. Medication possession ratio was the most commonly employed adherence measure (n=11). The majority of adherence studies (n=9) reported that medication adherence was associated with lower total health care costs. Pharmacy costs were often increased in adherent patients but this was offset by beneficial effects on other costs. Findings were more variable in persistence studies; three reported that higher pharmacy costs in persistent patients were not sufficiently offset by savings in other areas to result in a reduction in total health care costs. CONCLUSIONS Few studies have evaluated the relationship between adherence, persistence, and health care costs in T2DM. However, it has been consistently shown that medication nonadherence increases health care costs, suggesting that cost savings from better adherence could be substantial. Available data support the economic case for identification of strategies that facilitate improved medication adherence in patients with T2DM.
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Affiliation(s)
| | - Kristina S Boye
- Global Health Outcomes, Eli Lilly and Company, Indianapolis, IN, USA
| | - Xiaomei Peng
- Global Health Outcomes, Eli Lilly and Company, Indianapolis, IN, USA
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Kalirai S, Duan R, Liu D, Reed BL. Economic Impact of Treatment Duration and Persistence with Basal Insulin in Previously Insulin-Naive Users. J Manag Care Spec Pharm 2017; 23:327-336. [PMID: 28230446 PMCID: PMC10398170 DOI: 10.18553/jmcp.2017.23.3.327] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Although insulin is a well-established therapy that is associated with improved clinical outcomes, adherence and persistence with insulin regimens are poor in patients with type 2 diabetes mellitus (T2DM). Diabetes-related health care costs and the impact of insulin persistence patterns on these health care costs have been previously studied; however, these aspects of insulin therapy have limited data beyond the first year of use and have not been characterized among patients previously naive to basal insulin. OBJECTIVES To (a) describe and compare medical- and pharmacy-related costs, health care resource utilization, and comorbidities and complications during the initial year and second (experienced) year of basal insulin therapy, and (b) describe and compare the impact of continuous versus interrupted basal insulin use during each year. METHODS This was a retrospective observational database analysis using claims from multiple U.S. commercial health plans (Truven Health MarketScan) in previously insulin-naive patients with T2DM who were initiated on basal insulin. Data collected included all-cause and diabetes-related medical and pharmacy costs, health care resource utilization (i.e., number and type of outpatient visits, hospitalization, emergency department [ED] visits), medication use, and preselected comorbidities and complications. This cost analysis described and compared health care costs and resource use between the initial and experienced years and further compared health care costs and resource use between continuers and interrupters within each of those years. RESULTS A total of 23,645 patients were included in the analysis; 12,224 were classified as continuers and 11,421 were classified as interrupters. Among all patients, mean increases from the initial year to the experienced year were observed for all-cause medical costs ($12,690-$13,408; P = 0.048), all-cause pharmacy costs ($6,253-$6,559; P < 0.001), and all-cause health care costs ($18,943-$19,967; P = 0.006), after adjusting for inflation. All-cause pharmacy costs were significantly higher for continuers versus interrupters, but total diabetes-related medical care costs, all-cause ED costs, and all-cause medical costs were significantly lower, resulting in similar all-cause health care costs between continuers and interrupters in both the initial and experienced years. Among all patients, diabetes-related inpatient visits and outpatient primary care physician (PCP) visits, total medical inpatient visits, and total medical outpatient PCP visits were significantly higher in the initial year than in the experienced year; however, there were fewer diabetes-related ED visits in the initial year. CONCLUSIONS Initiation of basal insulin appears to be associated with increased health care costs, and treatment persistence pattern (continuers vs. interrupters) is further correlated with health care expenditures. Although associated with decreased pharmacy costs, interruption of therapy increases medical costs, underscoring the importance of addressing persistence to therapy. DISCLOSURES This study was funded by Eli Lilly and Company and Boehringer Ingelheim. Eli Lilly reviewed and approved this manuscript for submission. All the authors are employees and minor shareholders of Eli Lilly and Company. Study concept and design were contributed by Kalirai, Duan, and Reed. Duan and Liu collected the data, and data interpretation was performed by Kalirai. The manuscript was written by all the authors and revised by Kalirai.
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Affiliation(s)
| | - Ran Duan
- 1 Eli Lilly and Company, Indianapolis, Indiana
| | - Dongju Liu
- 1 Eli Lilly and Company, Indianapolis, Indiana
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