PMID- 22936821 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20121002 LR - 20240318 IS - 2044-6055 (Electronic) IS - 2044-6055 (Linking) VI - 2 IP - 4 DP - 2012 TI - A prospective observational study of quality of diabetes care in a shared care setting: trends and age differences (ZODIAC-19). LID - 10.1136/bmjopen-2012-001387 [doi] LID - e001387 AB - OBJECTIVE: The Zwolle Outpatient Diabetes project Integrating Available Care (ZODIAC) study was initiated in 1998 to investigate the effects of shared care for patients with type 2 diabetes mellitus (T2DM) in the Netherlands, and to reduce the number of diabetes-related complications. Benchmarking the performance of diabetes care was and is an important aspect of this study. We aimed to investigate trends in diabetes care, within the ZODIAC study for a wide variety of quality indicators during a long follow-up period (1998-2008), with special interest for different age groups. DESIGN: Prospective observational cohort study. SETTING: Primary care, Zwolle, The Netherlands. PARTICIPANTS: Patients with T2DM. METHODS: A dataset of quality measures was collected annually during the patient's visit to the practice nurse or general practitioner. Linear time trends from 1998 to 2008 were estimated using linear mixed models in which we adjusted for age and gender. Age was included in the model as a categorical variable: for each follow-up year all participants were categorised into the categories <60, 60-75 and >75 years. Differences in trends between the age categories were investigated by adding an interaction term to the model. RESULTS: The number of patients who were reported to participate increased in the period 1998-2008 from 1622 to 27 438. All quality indicators improved in this study, except for body mass index. The prevalence albuminuria decreased in an 11-year-period from 42% to 21%. No relevant differences between the trends for the three age categories were observed. During all years of follow-up, mean blood pressure and body mass index were the lowest and highest, respectively, in the group of patients <60 years (data not shown). CONCLUSIONS: Quality of diabetes care within the Dutch ZODIAC study, a shared care project, has considerably improved in the period 1998-2008. There were no relevant differences between trends across various age categories. FAU - van Hateren, Kornelis J J AU - van Hateren KJ AD - Diabetes Centre, Isala Clinics, Zwolle, The Netherlands. FAU - Drion, Iefke AU - Drion I FAU - Kleefstra, Nanne AU - Kleefstra N FAU - Groenier, Klaas H AU - Groenier KH FAU - Houweling, Sebastiaan T AU - Houweling ST FAU - van der Meer, Klaas AU - van der Meer K FAU - Bilo, Henk J G AU - Bilo HJ LA - eng PT - Journal Article DEP - 20120829 PL - England TA - BMJ Open JT - BMJ open JID - 101552874 PMC - PMC3432849 EDAT- 2012/09/01 06:00 MHDA- 2012/09/01 06:01 PMCR- 2012/08/29 CRDT- 2012/09/01 06:00 PHST- 2012/09/01 06:00 [entrez] PHST- 2012/09/01 06:00 [pubmed] PHST- 2012/09/01 06:01 [medline] PHST- 2012/08/29 00:00 [pmc-release] AID - bmjopen-2012-001387 [pii] AID - 10.1136/bmjopen-2012-001387 [doi] PST - epublish SO - BMJ Open. 2012 Aug 29;2(4):e001387. doi: 10.1136/bmjopen-2012-001387. Print 2012.