Status: Planned
First registered on:
30/04/2018
Last updated on:
05/05/2018
1. Study identification
EU PAS Register NumberEUPAS23769
Official titleStudy about the results of the addition of a sulfonylurea, DPP4 inhibitors or SGLT2 inhibitors as a second antidiabetic drug in patients with diabetes mellitus type 2 in treatment with metformin and insufficient glycemic control.
Study title acronymeControl Met +
Study typeObservational study
Brief description of the studyMain objective:
To compare the proportion of patients that achieve the reduction of HbA1c of at least 0.5%, and weight reduction of at least 3%, after the addition of a sulfonylurea, an DPP-4i or an SGLT-2i to the treatment with metformin in patients with T2DM and insufficient glycemic control up to a maximum of 24-month follow-up period.
Methodology:
Retrospective longitudinal cohort study with a maximum of 24-month follow-up period. Data will be collected from SIDIAP databases, which obtains data from electronic health care records of 75% of the Catalonia population attended in Primary Care facilities. We define as study population; patients diagnosed with type 2 diabetes mellitus on treatment with metformin and insufficient glycemic control that initiate treatment with a sulphonylurea, a DPP-4i or a SGLT-2i as a second antidiabetic drug during 2010-2015. The 3 cohorts will be formed and matched by propensity score technique according to age, sex, HbA1c and weight at the time of inclusion. Main determinations: Weight and Hb1Ac during 6, 12 and 24 months of follow-up and baseline characteristics for demographic variables and comorbidities related to their addition to the prescribed treatment. Statistical analysis: For the main analysis it will be used, the regression model of the mixed effects line and the COX models for the estimation of incidence and risk rates. Each dependent variable will be adjusted for baseline demographic factors and for predictive factors.
Expected results:
The data obtained from this study will improve the knowledge about the effects of the addition of a second oral antidiabetic.
Relevance: There is a need for a large-scale observational study to know the effects of the three most common strategies for the second therapeutic choice for T2DM in real practice conditions.
Keywords: Complications; glycemic control; type 2 diabetes mellitus; treatment.
Was this study requested by a regulator?No
Is the study required by a Risk Management Plan (RMP)?
Not applicable
Regulatory procedure number (RMP Category 1 and 2 studies only)
Other study registration identification numbers and URLs as applicableEthical committee protocol number:
P17-205
Internal code:
DAP-MET-2018-01
ESR code:
ESR-16-12628
2. Research centres and Investigator details
Coordinating study entity
Centre to which the investigator belongsIDIAPJGol
Department/Research groupInstitut Universitari d'Investigació en Atenció Primària Jordi Gol
Organisation/affiliationIDIAPJGol
Details of (Primary) lead investigator
Title Dr
Last name Franch-Nadal
First name Josep
Is this study being carried out with the collaboration of a research network?
No
Other centres where this study is being conducted
Multiple centres
In total how many centres are involved in this Study?279
Countries in which this study is being conducted
National study
Spain
3. Study timelines: initial administrative steps, progress reports and final report
PlannedActual
Date when funding contract was signed15/05/2018
Start date of data collection01/06/2018
Start date of data analysis01/10/2018
Date of interim report, if expected03/12/2018
Date of final study report15/01/2019
4. Sources of funding
Please provide estimates of the percentage of funding by source for this study
Names(s)Approximate % funding
Pharmaceutical companiesAstraZeneca100
Charities
Government body
Research councils
EU funding scheme
5. Contact details for enquiries
Scientific Enquiries
Title Dr
Last name Josep
First name Franch-Nadal
Address line 1Av. Drassanes, 17-21
Address line 2
Address line 3
CityBarcelona
Postcode08001
CountrySpain
Phone number (incl. country code)34-93-4824694
Alternative phone number
Fax number (incl. country code)
Public Enquiries
Title Mr
Last name Vlacho
First name Bogdan
Address line 1Sardenya, 375
Address line 2
Address line 3
CityBarcelona
Postcode08025
CountrySpain
Phone number (incl. country code)34-93-637367612
Alternative phone number
Fax number (incl. country code)
6. Study drug(s) information
Substance class (ATC Code)A10BA02
Substance class (ATC Code)A10BB
Substance class (ATC Code)A10BH
Substance class (ATC Code)A10BK
7. Medical conditions to be studied
Medical condition(s)Yes
Diabetes mellitus management
8. Population under study
Age
Adults (18 - 44 years)
Adults (45 - 64 years)
Adults (65 - 74 years)
Adults (75 years and over)
Sex
Male
Female
9. Number of subjects
Estimated total number of subjects189776
Additional information
All subjects that meet the inclusion criteria during the study period will be included. The number of subjects available in the SIDIAP database will determine the study size. We currently know that for the period between 2010 and 2016, we have about 189,776 potential subjects who have some dispensation registry of SU, DPP-4i, thiazolidinediones/gliflozins.
10. Source of data
Is this study being carried out with an established data source?Yes
Data sources registered with ENCePP
Sources of data
Routine primary care electronic patient registry
Pharmacy dispensing records
11. Scope of the study
What is the scope of the study?
Risk assessment
Drug utilisation study
Effectiveness evaluation
Primary scope : Drug utilisation study
12. Main objective(s)
What is the main objective of the study?
The primary objective:
• To compare the proportion of patients achieving the reduction in HbA1c values of at least 0.5%, a weight reduction of at least 3%, after the addition of a SU, an DPP-4i or an SGLT-2i to the treatment with metformin in patients with T2DM and insufficient glycemic control in the medium-long term, up to a maximum of 24 months of follow-up.
Are there primary outcomes?Yes
As outcomes, we define the reduction of HbA1c of at least 0.5%, reduction of a weight of at least 3%, as well as occurrence of different side effects after index date for each cohort.
Are there secondary outcomes?No
13. Study design
What is the design of the study?
Cohort study
Drug utilisation study
14. Follow-up of patients
Will patients be followed up?Yes
Please describe duration of follow up
The follow-up period for each patient is defined between the index date and up to 24 months or premature discontinuation from the study. Premature discontinuation from the study is defined as death, the switch or addition of a new antidiabetic treatment, last billing of study drugs before 24 months after prescription, or transfers to
15. Data analysis plan
Please provide a brief summary of the analysis method
Descriptive statistics (Minimum, maximum, mean, standard deviation, frequency, and percentage) of each of the registered variables will be used to describe and evaluate the baseline characteristics of the cohorts. To evaluate the homogeneity of the groups, it will be calculated the differences between the means and standard deviation with respect to one of the group's pre and post-matching. And homogeneity for categorical variables would be done by comparison of the frequency distribution across levels of the variable.
For the main analysis, generalized linear mixed models (GLMM) will be used to evaluate changes in clinical parameters between groups during follow-up. Average changes or reductions in average means per temporal unit will be estimated after treatment. COX regression models will be used to estimate the risk of achieving the combined objective(reduction of HbA1c of at least 0.5%, weight reduction of at least 3% or both) during follow-up.
16. ENCePP seal
Are you requesting the ENCePP seal for this study?
Yes
17. Full protocol
18. Study Results
Not submitted
Please list the 5 most relevant publications using data from your study
ReferenceLink to web-publication
None
19. Other relevant documents
Other documents
DescriptionDocumentLatest version
Signed Code of
Conduct Checklist
Not submitted
Signed Code of Conduct Declaration
Not submitted
Signed Checklist for Study
Protocols
Submitted
