Impact of a device that continuously measures glucose levels and patient education using written information and a consultation with a physician specialising on diabetes on patients with prediabetes identified by point-of-care tests in community pharmacies

ISRCTN ISRCTN74492936
DOI https://doi.org/10.1186/ISRCTN74492936
Sponsor Medical University of Vienna
Funders Austrian Chamber of Pharmacists, Roche
Submission date
10/04/2026
Registration date
10/04/2026
Last edited
10/04/2026
Recruitment status
Not yet recruiting
Overall study status
Ongoing
Condition category
Nutritional, Metabolic, Endocrine
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data
Record updated in last year

Plain English summary of protocol

Not provided at time of registration

Contact information

Dr Christian Schoergenhofer
Scientific, Principal investigator, Public

Währinger Gürtel 18-20
Vienna
1090
Austria

ORCiD logoORCID ID 0000-0002-2286-1077
Phone +43 (0)14040029810
Email christian.schoergenhofer@meduniwien.ac.at

Study information

Primary study designInterventional
AllocationRandomized controlled trial
MaskingOpen (masking not used)
ControlPlacebo
AssignmentParallel
PurposePrevention, Screening, Treatment
Scientific titleImpact of continuous glucose monitoring and patient education on patients with prediabetes identified by point-of- care tests in community pharmacies
Study acronymCGM-Pharm
Study objectives 1. To investigate the effects of continuous glucose monitoring and patient education on HbA1c% concentrations in patients with prediabetes.
2. To investigate the number of patients with elevated HbA1c levels in point-of-care screening tests in community pharmacies (>5.7%; 5.7-6.4%; ≥6.5%)
3. To investigate the effects of continuous glucose monitoring and patient education on various glucose indices in patients with prediabetes (e.g., time in range, time above range, estimated HBA1c%, mean glucose, continuous overall net glycemic action [CONGA, 1h-, 2h-, 4h-based], standard deviation, coefficient of variability, mean amplitude of glycemic excursions [MAGE], etc).
4. To investigate the successful referral rate to treating physicians in patients with HbA1c levels compatible with diabetes (≥6.5%) when using short-message-service-based reminders
5. To investigate the successful referral rate to treating physicians in patients with HbA1c levels compatible with prediabetes (5.7-6.4%), when using short-message-service-based reminders
6. To semiquantitatively assess the patient experiences with continuous glucose monitoring and the consultation
Ethics approval(s)

1. Approved 08/04/2026, Ethics committee of the city of Vienna (Thomas-Klestil-Platz 8/2, TownTown - Eingang: 3, Vienna, 1030, Austria; +43 (0)1 4000-87754; ethikkommission@ma15.wien.gv.at), ref: EK_25_251_0326

2. Approved 27/02/2026, Ethics Committee of the Medical University of Vienna (Borschkegasse 8b/E06, Vienna, 1090, Austria; +43 (0)1 4040021470; ethik-kom@meduniwien.ac.at), ref: 2346/2025

Health condition(s) or problem(s) studiedPrediabetes defined as having an HbA1c of ≥5.7% and ≤6.4%
InterventionRandomization will be conducted with a web-based program available at https://www.meduniwien.ac.at/randomizer using permuted blocks of variable size.

A continuous glucose measurement sensor will be applied in the control group after randomization and after 4-6 weeks. Furthermore, patients will receive written information on prediabetes. After 4-9 days of wearing the sensor, a phone consultation with a diabetes specialist will be conducted, in which blood sugar levels and their relationship with food intake will be explained and discussed.

In the control group, patients will receive written information at the beginning of the study, a sensor after 3 months and a phone consultation.
Intervention typeMixed
Primary outcome measure(s)
  1. HbA1c% measured using capillary blood samples and point-of-care devices at baseline to 3 months
Key secondary outcome measure(s)
  1. Number of patients at screening with HbA1c ≥5.7% measured using capillary blood samples and point-of-care devices at baseline
  2. Number of patients at screening with HbA1c ≥6.5% measured using capillary blood samples and point-of-care devices at baseline
  3. Number of patients at screening with HbA1c ≥5.7% and ≤6.4% measured using capillary blood samples and point-of-care devices at baseline
  4. Successful referral rate to treating physicians for patients with HbA1c of ≥6.5% using short-message-service-based reminders measured using telephone call or email confirmation at 3 months after study HbA1c quantification
  5. Successful referral rate to treating physicians for patients with HbA1c of 5.7-6.4% using short-message-service-based reminders measured using telephone call or email confirmation at 3 months after study HbA1c quantification
  6. Successful referral rate to treating physicians for patients with HbA1c of ≥5.7% using short-message-service-based reminders measured using telephone call or email confirmation at 3 months after study HbA1c quantification
  7. HbA1c% concentrations after 6 months compared to baseline between interventional group and control group measured using HbA1c% measured using capillary blood samples and point-of-care devices at baseline to 6 months
  8. In the control group: HbA1c% concentrations after 6 months (3 months after continuous glucose measurement Phase) vs baseline and vs 3 months measured using capillary blood samples and point-of-care devices at 3 months to 6 months
  9. Various glucose indices compared between continuous glucose measurement Phase 1 and continuous glucose measurement Phase 2 in the interventional group (Time in Range, Time in Tight Range, continuous overall net glycemic action (CONGA)- 1h, CONGA-2h, CONGA-4h, mean glucose, median glucose, standard deviation of glucose, coefficient of variation of glucose, mean amplitude of glycemic excursions (MAGE), Mean of Daily Differences (MODD), time below range, time above range) measured using blood sugar concentrations quantified by continuous glucose measurement device at CGM phase 1 (first 10-14 days) and CGM Phase 2 (second 10-14 days), which takes place 4-6 weeks after randomization
  10. Various glucose indices within the continuous glucose measurement Phase 1 (in the intervention and control group) comparing the first 50% and the second 50% of the continuous glucose measurement duration (maximum 14 days, minimum to be eligible 7d, e.g. if the sensor is worn for 10 days – 5 vs 5 days) measured using blood sugar concentrations quantified by continuous glucose measurement device at CGM Phase 1 first half vs second half
  11. Patient experiences with continuous glucose monitoring and the consultation measured using questionnaire, Likert Scale at 3 months (interventional group); 6 months (control group)
Completion date13/04/2028

Eligibility

Participant type(s)
Age groupMixed
Lower age limit18 Years
Upper age limit100 Years
SexAll
Target sample size at registration100
Key inclusion criteria1. ≥18 years of age
2. Screening is recommended by the Austrian Diabetes Society: >45 years of age, or >35 years of age with ≥1 risk factor:
2.1. First-degree relatives with diabetes
2.2. BMI ≥25 kg/m² (or ≥23 kg/m² for people with Asian descent)
2.3. Metabolic syndrome
2.4. Arterial hypertension
2.5. Dyslipidemia
2.6. Steatosis hepatis
2.7. History of gestational diabetes
2.8. Polycystic ovary syndrome

For Interventional Trial:
1. HbA1c% of ≥5.7% and ≤6.4%
2. Willingness to participate in the study and comply with the study’s requirements:
2.1. To wear a continuous glucose monitoring sensor for the projected time (maximum 14 days)
2.2. To share quantified glucose concentrations with the study team
2.3. To participate in all planned visits within the planned time-frame
2.4. To document their food intake during CGM periods (e.g., via taking photos or notes)
2.5. To have a smartphone
Key exclusion criteriaFor Screening Part:
1. Prior diagnosis with prediabetes or diabetes
2. Treatment with antidiabetic drugs

For Interventional Trial:
1. Inability to comply with the trial’s requirements
2. Skin conditions or prohibiting the use of a glucose monitor (wounds, eczema, dermatitis, infections, sunburns, etc)
3. Allergies or intolerances against the sensor or its materials/constituents, e.g., allergies against acrylic adhesive, isobornyl acrylate (IBOA), polyurethane, epoxy resins, plaster and tapes
4. Pregnancy or breastfeeding
5. Planned magnetic resonance imaging or computed tomography scans during the times when the CGM should be worn
6. Planned treatment with diathermy
7. Pregnancy – females with an ongoing pregnancy with prediabetes must not participate in the trial
8. Intake of methyldopa or high doses of Vitamin C (>500 mg/day or intravenous Vitamin C)
9. Intake of systemic corticosteroids
Date of first enrolment13/04/2026
Date of final enrolment13/04/2027

Locations

Countries of recruitment

  • Austria

Study participating centres

Medical University of Vienna, Department of Clinical Pharmacology
Währinger Gürtel 18-20
1090
1090
Austria
Apotheke Trillerpark
Trillergasse 4/16
Vienna
1210
Austria
Mariatroster Apotheke "Zum hl. Ulrich"
Burggasse 2
Vienna
1070
Austria
Siebenbrunnen Apotheke
Siebenbrunnengasse 32
Vienna
1050
Austria
Marien-Apotheke
Schmalzhofgasse 1
1060
1060
Austria
Columbus Apotheke
Favoritenstraße 73
Vienna
1100
Austria
Ludwigs-Apotheke
Simmeringer Hauptstraße 128
1110
1110
Austria
Apotheke zum Heiligen Joseph
Schönbrunner Straße 194-196
Vienna
1120
Austria
Apotheke am Lainzer Platz
Lainzer Straße 139
Vienna
1130
Austria
Apotheke Maria vom Siege
Mariahilferstraße 154
Vienna
Austria
Austria
Linden-Apotheke
Hernalser Hauptstraße 155
Vienna
1170
Austria
Humanitas-Apotheke
Jedleseer 66/94
Austria
1210
Austria
Apotheke Neu Kagran
Erzherzog-Karl-Straße 84-88
Vienna
1220
Austria
Seestadt Apotheke
Maria-Tusch-Straße 12
Vienna
1220
Austria
Vital Apotheke
Gatterederstraße 9
Vienna
1230
Austria
Apotheke Schwenk zum heiligen Johann von Nepomuk
Schönbrunner Straße 259
Vienna
1120
Austria

Results and Publications

Individual participant data (IPD) Intention to shareNo
IPD sharing plan summaryNot expected to be made available
IPD sharing plan

Editorial Notes

10/04/2026: Study's existence confirmed by the Ethics Committee of the Medical University of Vienna.