Condition category
Nutritional, Metabolic, Endocrine
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting

Plain English Summary

Background and study aims
The increasing occurrence of multiple, co-occurring long-term disease conditions places a burden for modern health systems. Methods to manage patient care (care management interventions) in Germany have been evaluated with promising results. However, further studies are necessary to explore the full potential of care management interventions for the improvement of outpatient diabetes care. The aim of this study is to find out how well a GP surgery net-based, IT-supported care management intervention with integrated telephone monitoring works for patients with type II diabetes and multiple co-occurring long-term conditions.

Who can participate?
Patients with type II diabetes and at least two severe long-term conditions, who are enrolled in the Disease-Management-Program Diabetes mellitus type 2 (DMP Diabetes) can participate in the study.

What does the study involve?
Patients will be randomly allocated to case management (PTC) or usual care (TAU). Both PTC and TAU receive usual care. Patients allocated to PTC receive an 18-month care management intervention given by a trained health care assistant as an add-on to usual care. This complex care management intervention consists of the two main elements: assessments including home visits and regular telephone-monitoring.

What are the possible benefits and risks of participating?
All participants and informal care givers help to improve the care given for patients with diabetes and multiple co-occurring conditions in the future. In addition patients in the PTC will potentially benefit by an improved diabetes-related self-care behaviour. There aren’t any risks expected for patients and informal care givers taking part in this study.

Where is the study run from?
The study is run by Genossenschaft Gesundheitsprojekt Mannheim e.G. (GGM), Germany from 30 primary care practices (PCP).

When is the study starting and how long is it expected to run for?
The study starts in February 2014 and is expected to run for 18 months.

Who is funding the study?
The Federal Ministry for Education and Research (BMBF), Germany.

Who is the main contact?
Dr Dominik Ose, MPH

Trial website

Contact information



Primary contact

Prof Dr. med. Joachim Szecsenyi


Contact details

Voßstr. 2
Geb. 37

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

A multi-center, individual-level randomized, 18-month, parallel-group superiority trial to compare the efficacy of a complex primary care practice network-based care management intervention versus usual care in the improvement of self-care behavior among patients with type II diabetes and multiple comorbidities (GEDIMAplus)


Study hypothesis

To assess the efficacy of a primary care practice net-based, IT-supported care management intervention with integrated telephone monitoring for patients with diabetes type II and multiple co-occurring chronic conditions.

Ethics approval

The Medical University of Heidelberg Ethics Committee, Germany, 02/12/2013, Ref.: S-590/2013

Study design

Prospective 18-month multi-center investigator-blinded two-armed open label individual-level randomized parallel-group superiority trial (RCT)

Primary study design


Secondary study design

Randomised controlled trial

Trial setting

GP practices

Trial type


Patient information sheet

Not available in web format, please use the contact details below to request a patient information sheet


Diabetes mellitus type 2 and mulitple co-occuring chronic conditions.


Participants are randomized to two groups:
1. Intervention:
The 18-month care management intervention (GEDIMAplus) is delivered by a trained health care assistant as add-on to usual care and consists of 2 main elements: 3 home visits including structured assessment of medical and social needs and 24 structured telephone monitoring contacts. All elements are IT-supported using a care manager-software as intervention platform. In addition goal setting between primary care physicians and patient based on the results of the assessment will take place.
2. Control: usual care in the scope of the statutory health care system (DMP Diabetes).

Care for other diseases (chronic or acute) besides diabetes is managed by PCP physicians individually based on personal experience, guidelines and/or patients’ preferences.

Data collection: baseline (T0), primary endpoint after 9 months (T1), follow-up after 18 months (T2)

Intervention type



Not Applicable

Drug names

Primary outcome measure

Change in diabetes related selfcare behavior using a German version of the revised “Summary of diabetes self-care activities measure” (SDSCA-G) after 9 months.

Secondary outcome measures

1. Change in SDSCA-G at T2
2. Mean change in each of the five dimension of self-care captured by the SDSCA-G
3. Mean change in physician-reported glycosylated hemoglobin A1 (HbA1c %) at T1/T2
4. The cumulative incidence of physician-reported (severe) symptomatic hypoglycemia at T1/T2
5. Mean change in patient-reported health related quality of life (HRQL) at T1/T2
6. Mean change in patient-reported self-efficacy to cope with chronic conditions
7. Differences in service utilization
8. Costs of health care provision and financial burden of informal care between intervention and control group

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

Primary care practices (PCPs):
PCP physicians must fulfill the following criteria: Specialized in General Practice, Internal Medicine or Practical Physician (praktischer Arzt) and function as “Primary care physician” (Hausarzt) according to German regulations. Both single and group practices (Gemeinschaftspraxen) are eligible to participate.

To be eligible for participation in the study, patients have to be:
1. Aged 18 years or above
2. Diagnosed with type 2 diabetes mellitus (ICD 10: E11-E14)
3. Enrolled in the DMP Diabetes, and diagnosed with at least two severe chronic comorbidities („schwerwiegende chronische Erkrankung“) according to the definition enshrined in § 62 SGB V. Additionally, written informed consent is a prerequisite for participation in the study.

Patient’s caregiving family member:
A caregiving family member is defined as the family member who (from the patients’ perspective) spends the largest amount of time with informal care (e.g. spouse, partner, father, mother, son, daughter, others) and lives in the same household.

Participant type


Age group




Target number of participants

A total of 592 patients (291 per arm) will be recruited in 30 PCPs.

Participant exclusion criteria

PCPs and patients’ caregiving family members:
PCPs and patients’ caregiving family members who do not fulfill the inclusion criteria will be excluded.

1. Patients who do not fulfill the inclusion criteria will be excluded. Additional exclusion criteria are patients with: Severe acute psychiatric disorders, e.g. schizophrenia, schizotypal and delusional disorders (ICD 10: F20-F29), dementia (ICD 10: F00-F03), mental and behavioral disorders due to psychoactive substance use (ICD 10: F11-F16; F18; F19) (except for alcohol (ICD 10: F10) and tobacco use (ICD 10: F17)), malignant neoplasms (ICD 10: C00-C97) and/or current chemotherapy or radiotherapy, transplanted organ and tissue status (ICD 10: Z94), care involving dialysis (ICD 10: Z49), insurmountable language and communication problems, emergency cases.

Recruitment start date


Recruitment end date



Countries of recruitment


Trial participating centre

Voßstr. 2, Geb. 37

Sponsor information


Federal Ministry for Education and Research (BMBF) (Germany)

Sponsor details

Hannoversche Straße 28-30

Sponsor type




Funder type


Funder name

Federal Ministry for Education and Research (BMBF), Germany, in the scope of the project 'Gesundheitsregion der Zukunft'

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Basic results (scientific)

Publication list

2014 protocol in:

Publication citations

  1. Protocol

    Bozorgmehr K, Szecsenyi J, Ose D, Besier W, Mayer M, Krisam J, Jacke CO, Salize HJ, Brandner R, Schmitt S, Kiel M, Kamradt M, Freund T, Practice network-based care management for patients with type 2 diabetes and multiple comorbidities (GEDIMAplus): study protocol for a randomized controlled trial., Trials, 2014, 15, 243, doi: 10.1186/1745-6215-15-243.

Additional files

Editorial Notes