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01.12.2012 | Original investigation | Ausgabe 1/2012 Open Access

Cardiovascular Diabetology 1/2012

Characteristics of poorly controlled Type 2 diabetes patients in Swiss primary care

Cardiovascular Diabetology > Ausgabe 1/2012
Anja Frei, Stefanie Herzog, Katja Woitzek, Ulrike Held, Oliver Senn, Thomas Rosemann, Corinne Chmiel
Wichtige Hinweise

Competing interests

The authors declare that they have no competing interests.

Authors’ contributions

TR, AF and CC were the initiators of the study and participated together with OS in the design of the study. AF and TR organised the recruitment of the practices. AF, CC and TR developed the questionnaires. SH and KW organised the data collection and management. UH and OS supervised the analyses and gave statistical and methodical input. AF, CC and SH performed the statistical analysis. AF, CC and OS drafted the report which the paper is based on. All authors contributed in writing and revising the manuscript. All authors read and approved the final manuscript.



Although a variety of treatment guidelines for Type 2 diabetes patients are available, a majority of patients does not achieve recommended targets. We aimed to characterise Type 2 diabetes patients from Swiss primary care who miss HbA1c treatment goals and to reveal factors associated with the poorly controlled HbA1c level.


Cross-sectional study nested within the cluster randomised controlled Chronic Care for Diabetes study. Type 2 diabetes patients with at least one HbA1c measurement ≥7.0 % during the last year were recruited from Swiss primary care. Data assessment included diabetes specific and general clinical measures, treatment factors and patient reported outcomes.


326 Type 2 diabetes patients from 30 primary care practices with a mean age 67.1 ± 10.6 years participated in the study. The patients’ findings for HbA1c were 7.7 ± 1.3 %, for systolic blood pressure 139.1 ± 17.6 mmHg, for diastolic blood pressure 80.9 ± 10.5 mmHg and for low density lipoprotein 2.7 ± 1.1. 93.3 % of the patients suffered from at least one comorbidity and were treated with 4.8 ± 2.1 different drugs. No determining factor was significantly related to HbA1c in the multiple analysis, but a significant clustering effect of GPs on HbA1c could be found.


Within our sample of patients with poorly controlled Type 2 diabetes, no “bullet points” could be pointed out which can be addressed easily by some kind of intervention. Especially within this subgroup of diabetes patients who would benefit the most from appropriate interventions to improve diabetes control, a complex interaction between diabetes control, comorbidities, GPs’ treatment and patients’ health behaviour seems to exist. So far this interaction is only poorly described and understood.

Trial registration

Current Controlled Trials ISRCTN05947538.
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