PMID- 31098887 OWN - NLM STAT- MEDLINE DCOM- 20200205 LR - 20200225 IS - 1618-7601 (Electronic) IS - 1618-7598 (Linking) VI - 20 IP - 7 DP - 2019 Sep TI - Costs of people with diabetes in relation to average glucose control: an empirical approach controlling for year of onset cohorts. PG - 989-1000 LID - 10.1007/s10198-019-01072-z [doi] AB - OBJECTIVE: To estimate the impact of glycaemic control and time since diabetes diagnosis on care costs incurred by people with type 2 diabetes mellitus (T2DM). RESEARCH DESIGN AND METHODS: Random-effects linear regression models were run to test the impact of average glucose control (HbA1c) and time since diabetes diagnosis on total care spending in people with T2DM, adjusting for year of onset and other covariates. Two datasets were linked, Vektis (healthcare costs reimbursed by the Dutch mandatory health insurance) and Zodiac (clinical and sociodemographic data). The sample includes 22,612 observations, grouped in 5653 individuals from the Northern part of the Netherlands, covering 4 years (2008-2011). RESULTS: A 1% point increase in HbA1c is associated with a 2.2% higher total care costs. However, when treatment modality is included, the results are modified. A 1% point increase (11 mol/mol) in HbA1c is significantly associated with 3.4% higher total care costs for individuals without glucose-lowering treatment. Being treated with insulin is significantly associated with an increase in costs of 30-38% for every additional percentage point of HbA1c, depending on the covariates included. Without controlling for year of onset, an additional year of diabetes duration relates to 2.6% higher care costs, while this is 4.9% controlling for year of onset. The effect of HbA1c and diabetes duration differs between types of costs. CONCLUSION: HbA1c, insulin treatment and diabetes duration are the main drivers of increasing care costs. The results signal the relevance of controlling for HbA1c together with treatment modality, diabetes duration and year of diagnosis effects. FAU - Rodriguez-Sanchez, Beatriz AU - Rodriguez-Sanchez B AUID- ORCID: 0000-0002-6146-068X AD - Department of Economic Analysis and Finance, Faculty of Law and Social Sciences, University of Castilla la Mancha, Cobertizo de San Pedro Martir s/n, 45071, Toledo, Spain. Beatriz.RSanchez@uclm.es. FAU - Feenstra, Talitha L AU - Feenstra TL AD - Department of Epidemiology, University Medical Centrum of Groningen, Groningen, The Netherlands. FAU - Bilo, Henk J G AU - Bilo HJG AD - Department of Internal Medicine-Management, University Medical Centrum of Groningen, Groningen, The Netherlands. FAU - Alessie, Rob J M AU - Alessie RJM AD - Department of Economics, Econometrics and Finance, University of Groningen, Groningen, The Netherlands. LA - eng PT - Journal Article PT - Observational Study DEP - 20190516 PL - Germany TA - Eur J Health Econ JT - The European journal of health economics : HEPAC : health economics in prevention and care JID - 101134867 RN - 0 (Blood Glucose) SB - IM MH - Aged MH - *Blood Glucose/analysis MH - Diabetes Mellitus, Type 2/*economics/therapy MH - Female MH - *Health Expenditures/trends MH - Humans MH - Male MH - Middle Aged MH - Netherlands MH - Prospective Studies MH - Regression Analysis OTO - NOTNLM OT - Average glucose control OT - Care costs OT - Diabetes duration OT - Diabetes treatment OT - Type 2 diabetes mellitus OT - Year of onset cohorts EDAT- 2019/05/18 06:00 MHDA- 2020/02/06 06:00 CRDT- 2019/05/18 06:00 PHST- 2018/11/12 00:00 [received] PHST- 2019/05/07 00:00 [accepted] PHST- 2019/05/18 06:00 [pubmed] PHST- 2020/02/06 06:00 [medline] PHST- 2019/05/18 06:00 [entrez] AID - 10.1007/s10198-019-01072-z [pii] AID - 10.1007/s10198-019-01072-z [doi] PST - ppublish SO - Eur J Health Econ. 2019 Sep;20(7):989-1000. doi: 10.1007/s10198-019-01072-z. Epub 2019 May 16.