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Completed

NCT Number: NCT02232698

An Evaluation of Novel Glucose Sensing Technology on Hypoglycaemia in Type 1 Diabetes (IMPACT)

The purpose of this study is to evaluate the impact of the Abbott Sensor Based Glucose Monitoring System on hypoglycaemia compared to Self Monitoring Blood Glucose (SMBG) testing using a randomised controlled study design in adults with Type 1 diabetes using insulin.

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Key information

Conditions

Type 1 Diabetes Mellitus Autoimmune Diseases Diabetes Mellitus Diabetes Mellitus, Type 1 Endocrine System Diseases Glucose Metabolism Disorders Immune System Diseases Metabolic Diseases Nutritional and Metabolic Diseases

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

VIVIT-Institut am Akad. Lehrkrankenhaus Feldkirch, Innere Medizin und Kardiologie, Feldkirch, Austria

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Diagnosed with Type 1 diabetes for ≥ 5 years
  • On their current insulin regimen for ≥ 3 months prior to study entry
  • Screening HbA1c result ≤ 7.5% (58 mmol/mol)
  • Reports self testing of blood glucose levels on a regular basis equivalent to a minimum of 3 times daily for at least 2 months prior to study entry
  • In the investigator's opinion the subject is considered technically capable of using the Abbott Sensor Based Glucose Monitoring System
  • Aged 18 years or over.

Exclusion criteria

  • Subject has been diagnosed with hypoglycaemic unawareness (i.e. subject has a diagnosis of impaired awareness of hypoglycaemia recorded in their medical notes OR in the investigator's opinion the subject currently experiences less than minimal warning symptoms for impending hypoglycaemia)
  • Subject is currently prescribed animal insulin
  • Subject is currently prescribed oral steroid therapy or is likely to require oral steroid therapy for any acute or chronic condition during the study
  • Has known allergy to medical grade adhesives
  • Currently participating in another device or drug study that could affect glucose measurements or glucose management
  • Currently using a Continuous Glucose Monitoring (CGM) device or has used one within the previous 4 months
  • Currently using Sensor augmented pump therapy
  • Is planning to use a CGM device at any time during the study
  • A female subject who is pregnant or planning to become pregnant within the study duration
  • A breast feeding mother
  • Currently receiving dialysis treatment or planning to receive dialysis during the study
  • Has a pacemaker
  • Has experienced an acute myocardial infarction within previous 6 months
  • Has a concomitant disease or condition that may compromise subject safety including; unstable coronary heart disease, cystic fibrosis, serious psychiatric disorder, or any other uncontrolled medical condition
  • Has experienced an episode of confirmed or suspected diabetic ketoacidosis (DKA) in the previous 6 months
  • In the investigator's opinion, the subject is considered unsuitable for inclusion in the study for any other reason.

Treatment and study plan

Sensor Based Glucose Monitoring System

Device

Subjects will wear the Abbott Sensor Based Glucose Monitoring System (unmasked) for 6 months to monitor their glucose levels.

All subjects will wear a masked Abbott Sensor Based Glucose Monitoring System, for 14 days prior to randomisation (Sensor glucose measurements not visible during this time).

Standard Blood Glucose Monitoring

Device

Subjects will use an Abbott Blood Glucose Monitoring System (standard blood glucose meter) for 6 months to monitor their glucose levels. A 14-day masked wear of the Abbott Sensor Based Glucose Monitoring System is included for these subjects at the 3 and 6 month time point, to collect glycaemic variability data for comparison to the intervention group of the study (Sensor glucose measurements not visible during this time).

All subjects will wear a masked Abbott Sensor Based Glucose Monitoring System, for 14 days prior to randomisation (Sensor glucose measurements not visible during this time).

Primary outcomes

  1. Time Spent <70 mg/dL

    Time frame: Baseline and Days 194 to 208

    Difference in time <70 mg/dL between intervention and control group assessed in days 194 to 208 adjusting for baseline (days 1 to 15).

Secondary outcomes

  1. HbA1c at 6 Months

    Time frame: Baseline and Day 208

    Difference in HbA1c between intervention and control group at day 208 adjusting for baseline HbA1c at day 1

  2. Time Spent <55 mg/dL and <40 mg/dL

    Time frame: Baseline and Days 194 to 208

    Difference in time <55 mg/dL & <40 mg/dL (hours per day) between intervention and control group assessed in days 194 to 208 adjusting for baseline (days 1 to 15).

  3. Frequency of Episodes <70 mg/dL, <55 mg/dL and <40 mg/dL

    Time frame: Baseline and Days 194-208

    Difference in frequency of episodes <70 mg/dL, <55 mg/dL and <40 mg/dL (number per day) between intervention and control group assessed in days 194 to 208 adjusting for baseline (days 1 to 15).

  4. Time Spent >180 mg/dL and >240 mg/dL

    Time frame: Baseline and Days 194 to 208

    Difference in time >180 mg/dL and >240 mg/dL (hours per day) between intervention and control group assessed in days 194 to 208 adjusting for baseline (days 1 to 15).

  5. Time in Range

    Time frame: Baseline and Days 194 to 208

    Difference in time in range 70-180 mg/dL between intervention and control group assessed in days 194 to 208 adjusting for baseline (days 1 to 15 time in range).

  6. Number of Glucose Measurements Performed

    Time frame: Days 1 to 208

    Number of blood glucose fingerstick tests per day by intervention and control group during baseline (days 1 to 15) and days 194 to 208. The number of sensor scans performed performed by the intervention group during days 15 to 208.

  7. System Utilisation

    Time frame: Days 15 to 208

    System utilisation assessed by percentage of sensor glucose data collected by the intervention group

  8. Change in Diabetes Treatment Satisfaction Questionnaire (DTSQc) Scores From Day 1 to Day 208

    Time frame: Baseline and Day 208

    The Diabetes Treatment Satisfaction Questionnaire change (DTSQc) score is used to assess relative change in participant satisfaction from baseline. The questionnaire consists of 8 items, 6 of which (1 and 4 through 8) assess treatment satisfaction. Each item is rated on a 7-point Likert scale (which ranges from -3 (much less satisfied) to +3 (much more satisfied). The scores from the 6 treatment satisfaction items are summed to a Total Treatment Satisfaction Score, which ranges from -18 (much less satisfied) to +18 (much more satisfied).

    There is one question to assess the change in perceived frequency of Hypoglycaemia and one question to assess change in perceived frequency of Hyperglycaemia. Each question is rated on a 7-point Likert scale (-3 to +3), -3 (much less of the time now) to +3 (much more of the time now).

    The ANCOVA adjusts for baseline DTSQs (status version).

Sponsors and collaborators

Lead sponsor

Abbott Diabetes Care

Industry

Registry information

Official study title

Randomised Controlled Study to Evaluate the Impact of Novel Glucose Sensing Technology on Hypoglycaemia in Type 1 Diabetes

Acronym: IMPACT

Important dates

Study start
2014
Primary completion
2015
Study completion
2015
First posted
Sep 5, 2014
Registry last updated
Apr 10, 2017

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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