Clinical Trial Results:
Dual-Hormone Closed-Loop Glucose Control in Type 1 Diabetes
Summary
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EudraCT number |
2019-001631-31 |
Trial protocol |
DK |
Global end of trial date |
19 Mar 2021
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Results information
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Results version number |
v1(current) |
This version publication date |
15 Mar 2023
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First version publication date |
15 Mar 2023
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Other versions |
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Summary report(s) |
Oral_presentation_ADA2021 |
Trial Information
Subject Disposition
Baseline Characteristics
End Points
Adverse Events
More Information
Subject Disposition
Baseline Characteristics
End Points
Adverse Events
More Information
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Trial identification
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Sponsor protocol code |
DHCL2019
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Additional study identifiers
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ISRCTN number |
- | ||
US NCT number |
NCT04053712 | ||
WHO universal trial number (UTN) |
- | ||
Other trial identifiers |
Former EUDRA-CT: 2014-003261-20, Former Protocol code number: DHCL2014 | ||
Sponsors
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Sponsor organisation name |
Steno Diabetes Center Copenhagen
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Sponsor organisation address |
Niels Steensens Vej 2, Gentofte, Denmark, 2820
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Public contact |
Ajenthen Ranjan, Steno Diabetes Center Copenhagen, +45 26196604, ajenthen.ranjan@regionh.dk
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Scientific contact |
Ajenthen Ranjan, Steno Diabetes Center Copenhagen, +45 26196604, ajenthen.ranjan@regionh.dk
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Paediatric regulatory details
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Is trial part of an agreed paediatric investigation plan (PIP) |
No
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Does article 45 of REGULATION (EC) No 1901/2006 apply to this trial? |
No
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Does article 46 of REGULATION (EC) No 1901/2006 apply to this trial? |
No
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Results analysis stage
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Analysis stage |
Final
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Date of interim/final analysis |
27 Feb 2023
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Is this the analysis of the primary completion data? |
Yes
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Primary completion date |
19 Mar 2021
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Global end of trial reached? |
Yes
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Global end of trial date |
19 Mar 2021
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Was the trial ended prematurely? |
No
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General information about the trial
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Main objective of the trial |
The aims of this two-phase project are to 1) demonstrate proof-of-concept and 2) to compare dual-hormone with single-hormone closed-loop glucose control.
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Protection of trial subjects |
Participants experiencing symptomatic hypoglycemia or a plasmaglucose (PG) <3.0 mmol/L (54 mg/dL) received 15 g oral glucose (dextrose tablets) rescue treatment and received another if not resolved after 15 minutes. In contrast, if PG remained > 16.0 mmol/L (288 mg/dL) for two hours despite solving any closed-system malfunctions, an insulin bolus was administered based on the participant’s insulin sensitivity factor (ISF) to aim for a PG of 7.0 mmol/L (126 mg/dL).
Side effects to glucagon (nausea, headache, stomachache, and palpitations) were scored using a 0–100 visual analog scale (VAS) every four hours from 7AM to 11PM.
Regardless of the mode of closed-loop control, the study visit lasted for 33 hours. The study pumps and the continuos glucose monitors (CGMs) were then disconnected and the participants were allowed to reconnect their own pump and CGM.
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Background therapy |
- | ||
Evidence for comparator |
- | ||
Actual start date of recruitment |
01 Jun 2019
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Long term follow-up planned |
No
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Independent data monitoring committee (IDMC) involvement? |
Yes
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Population of trial subjects
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Number of subjects enrolled per country |
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Country: Number of subjects enrolled |
Denmark: 13
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Worldwide total number of subjects |
13
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EEA total number of subjects |
13
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Number of subjects enrolled per age group |
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In utero |
0
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Preterm newborn - gestational age < 37 wk |
0
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Newborns (0-27 days) |
0
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Infants and toddlers (28 days-23 months) |
0
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Children (2-11 years) |
0
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Adolescents (12-17 years) |
0
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Adults (18-64 years) |
13
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From 65 to 84 years |
0
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85 years and over |
0
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Recruitment
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Recruitment details |
Participants were recruited from the outpatient clinic at Steno Diabetes Center Copenhagen, Denmark, from August 2019 to December 2020. | |||||||||
Pre-assignment
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Screening details |
Inclusion criteria were age ≥18 years, T1D duration > 2 years, use of insulin pumps for ≥ 1 years, glycated hemoglobin (HbA1c) level ≤ 8.5% (69 mmol/mol), and current use of faster insulin aspart (Novo Nordisk, Bagsværd, Denmark). | |||||||||
Pre-assignment period milestones
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Number of subjects started |
13 | |||||||||
Number of subjects completed |
13 | |||||||||
Period 1
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Period 1 title |
Overall trial (overall period)
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Is this the baseline period? |
Yes | |||||||||
Allocation method |
Randomised - controlled
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Blinding used |
Single blind | |||||||||
Roles blinded |
Subject | |||||||||
Blinding implementation details |
The pumps were filled with FiAsp® and GlucaGen® during the DHCL visit or filled with FiAsp® and isotonic saline during SHCL, respectively. Participants were masked for the contents in the pumps.
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Arms
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Are arms mutually exclusive |
Yes
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Arm title
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Dual-hormone --> Single hormone | |||||||||
Arm description |
Participants went through Dual-hormone and then Single-hormone treatment | |||||||||
Arm type |
Experimental | |||||||||
Investigational medicinal product name |
GlucaGen
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Powder and solution for solution for injection
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Routes of administration |
Subcutaneous use
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Dosage and administration details |
Variable dose between 0-1mg given based on an algorithm for the treatment and prevention of hypoglycemia.
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Investigational medicinal product name |
Fiasp
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Powder and solution for solution for injection
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Routes of administration |
Injection
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Dosage and administration details |
Variable dose given by the insulin pump
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Investigational medicinal product name |
Saline
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Powder and solution for solution for injection
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Routes of administration |
Injection
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Dosage and administration details |
Saline was stored in an insulin pump but did not deliver any saline during the trials (e.g. functioned as a dummy-pump)
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Arm title
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Single-hormone --> Dual-hormone | |||||||||
Arm description |
Participants went through single-hormone and then dual-hormone treatment | |||||||||
Arm type |
Experimental | |||||||||
Investigational medicinal product name |
Fiasp
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Powder and solution for solution for injection
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Routes of administration |
Injection
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Dosage and administration details |
Variable dose given by the insulin pump
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Investigational medicinal product name |
Saline
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Powder and solution for solution for injection
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Routes of administration |
Injection
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Dosage and administration details |
Saline was stored in an insulin pump but did not deliver any saline during the trials (e.g. functioned as a dummy-pump)
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Investigational medicinal product name |
GlucaGen
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Powder and solution for solution for injection
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Routes of administration |
Subcutaneous use
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Dosage and administration details |
Variable dose between 0-1mg given based on an algorithm for the treatment and prevention of hypoglycemia.
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Baseline characteristics reporting groups
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Reporting group title |
Dual-hormone --> Single hormone
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Reporting group description |
Participants went through Dual-hormone and then Single-hormone treatment | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reporting group title |
Single-hormone --> Dual-hormone
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Reporting group description |
Participants went through single-hormone and then dual-hormone treatment | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Subject analysis sets
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Subject analysis set title |
DHCL
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Subject analysis set type |
Intention-to-treat | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Subject analysis set description |
Data were analyzed in an intention-to-treat approach including periods with any malfunction of the infusion set (e.g. occlusions, kinking of the tube), missing CGM values, and loss of connectivity between study devices to run the closed-loop systems .
Repeated-measures ANOVA with a compound symmetry covariance structure was used to test the differences between the two study visits, adjusting for the study order. If data had a skewed distribution, logarithmic transformations were used. If the transformations could not normalize the distribution, nonparametric Wilcoxon signed rank tests were used. Spearman correlations were used to determine relationships. The difference of the time course of PG, insulin and glucagon was tested with a linear mixed model with random effects. A P value of <0.05 was considered statistically significant. Non-predefined outcomes were Bonferroni adjusted for multiple comparisons within each parameter.
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Subject analysis set title |
SHCL
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Subject analysis set type |
Intention-to-treat | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Subject analysis set description |
Completers of SIngle-hormone
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End points reporting groups
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Reporting group title |
Dual-hormone --> Single hormone
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Reporting group description |
Participants went through Dual-hormone and then Single-hormone treatment | ||
Reporting group title |
Single-hormone --> Dual-hormone
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Reporting group description |
Participants went through single-hormone and then dual-hormone treatment | ||
Subject analysis set title |
DHCL
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Subject analysis set type |
Intention-to-treat | ||
Subject analysis set description |
Data were analyzed in an intention-to-treat approach including periods with any malfunction of the infusion set (e.g. occlusions, kinking of the tube), missing CGM values, and loss of connectivity between study devices to run the closed-loop systems .
Repeated-measures ANOVA with a compound symmetry covariance structure was used to test the differences between the two study visits, adjusting for the study order. If data had a skewed distribution, logarithmic transformations were used. If the transformations could not normalize the distribution, nonparametric Wilcoxon signed rank tests were used. Spearman correlations were used to determine relationships. The difference of the time course of PG, insulin and glucagon was tested with a linear mixed model with random effects. A P value of <0.05 was considered statistically significant. Non-predefined outcomes were Bonferroni adjusted for multiple comparisons within each parameter.
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Subject analysis set title |
SHCL
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Subject analysis set type |
Intention-to-treat | ||
Subject analysis set description |
Completers of SIngle-hormone
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End point title |
Percentage of time in CGM-range below 3.9 mmol/l | ||||||||||||
End point description |
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End point type |
Primary
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End point timeframe |
0-33 hours
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Statistical analysis title |
Wilcoxon Signed Rank Test | ||||||||||||
Comparison groups |
DHCL v SHCL
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Number of subjects included in analysis |
26
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Analysis specification |
Pre-specified
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Analysis type |
superiority | ||||||||||||
P-value |
= 0.26 | ||||||||||||
Method |
Wilcoxon (Mann-Whitney) | ||||||||||||
Confidence interval |
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End point title |
Number of carbohydrate interventions to treat hypoglycemia | |||||||||
End point description |
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End point type |
Primary
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End point timeframe |
0-33 hours
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Statistical analysis title |
McNemar | |||||||||
Comparison groups |
DHCL v SHCL
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Number of subjects included in analysis |
26
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Analysis specification |
Pre-specified
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Analysis type |
superiority | |||||||||
P-value |
= 0.03 | |||||||||
Method |
Mcnemar | |||||||||
Confidence interval |
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End point title |
Mean glucose | ||||||||||||
End point description |
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End point type |
Secondary
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End point timeframe |
0-33 hours
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Statistical analysis title |
Mixed Model analysis | ||||||||||||
Statistical analysis description |
Repeated-measures ANOVA with a compound symmetry covariance structure was used to test the differences between the two study visits, adjusting for the study order. If data had a skewed distribution, logarithmic transformations were used
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Comparison groups |
DHCL v SHCL
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Number of subjects included in analysis |
26
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Analysis specification |
Pre-specified
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Analysis type |
superiority | ||||||||||||
P-value |
= 0.3 | ||||||||||||
Method |
Mixed models analysis | ||||||||||||
Confidence interval |
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End point title |
Number of events below 3.9 mmol/L | |||||||||
End point description |
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End point type |
Secondary
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End point timeframe |
0-33 hours
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Statistical analysis title |
McNemar | |||||||||
Comparison groups |
DHCL v SHCL
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Number of subjects included in analysis |
26
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Analysis specification |
Pre-specified
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Analysis type |
superiority | |||||||||
P-value |
= 0.13 | |||||||||
Method |
Mcnemar | |||||||||
Confidence interval |
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End point title |
Percentage of time in CGM-range between 3.9 and 10 mmol/l | ||||||||||||
End point description |
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End point type |
Secondary
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End point timeframe |
0-33 hours
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Statistical analysis title |
Mixed Model analysis | ||||||||||||
Statistical analysis description |
Repeated-measures ANOVA with a compound symmetry covariance structure was used to test the differences between the two study visits, adjusting for the study order. If data had a skewed distribution, logarithmic transformations were used
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Comparison groups |
DHCL v SHCL
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Number of subjects included in analysis |
26
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Analysis specification |
Pre-specified
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Analysis type |
superiority | ||||||||||||
P-value |
= 0.36 | ||||||||||||
Method |
Mixed models analysis | ||||||||||||
Confidence interval |
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End point title |
Percentage of time in CGM-range above 10.0 mmol/l | ||||||||||||
End point description |
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End point type |
Secondary
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End point timeframe |
0-33 hours
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Statistical analysis title |
Mixed Model analysis | ||||||||||||
Statistical analysis description |
Repeated-measures ANOVA with a compound symmetry covariance structure was used to test the differences between the two study visits, adjusting for the study order. If data had a skewed distribution, logarithmic transformations were used
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Comparison groups |
DHCL v SHCL
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Number of subjects included in analysis |
26
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Analysis specification |
Pre-specified
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Analysis type |
superiority | ||||||||||||
P-value |
= 0.46 | ||||||||||||
Method |
Mixed models analysis | ||||||||||||
Confidence interval |
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End point title |
Percentage of time in CGM-range below 3.0 mmol/l | ||||||||||||
End point description |
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End point type |
Secondary
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End point timeframe |
0-33 hours
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Statistical analysis title |
Wilcoxon Signed Rank Test | ||||||||||||
Comparison groups |
DHCL v SHCL
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Number of subjects included in analysis |
26
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Analysis specification |
Pre-specified
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Analysis type |
superiority | ||||||||||||
P-value |
= 0.46 | ||||||||||||
Method |
Wilcoxon (Mann-Whitney) | ||||||||||||
Confidence interval |
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End point title |
Coefficient of variation for sensor glucose | ||||||||||||
End point description |
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End point type |
Secondary
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End point timeframe |
0-33 hours
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Statistical analysis title |
Mixed Model analysis | ||||||||||||
Statistical analysis description |
Repeated-measures ANOVA with a compound symmetry covariance structure was used to test the differences between the two study visits, adjusting for the study order. If data had a skewed distribution, logarithmic transformations were used
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Comparison groups |
DHCL v SHCL
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Number of subjects included in analysis |
26
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Analysis specification |
Pre-specified
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Analysis type |
superiority | ||||||||||||
P-value |
= 0.3 | ||||||||||||
Method |
Mixed models analysis | ||||||||||||
Confidence interval |
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End point title |
Mean insulin bolus dose | ||||||||||||
End point description |
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End point type |
Secondary
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End point timeframe |
0-33 hours
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Statistical analysis title |
Mixed Model analysis | ||||||||||||
Comparison groups |
DHCL v SHCL
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Number of subjects included in analysis |
26
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Analysis specification |
Pre-specified
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Analysis type |
superiority | ||||||||||||
P-value |
= 0.17 | ||||||||||||
Method |
Mixed models analysis | ||||||||||||
Confidence interval |
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End point title |
Mean insulin basal dose | ||||||||||||
End point description |
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End point type |
Secondary
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End point timeframe |
0-33 hours
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Statistical analysis title |
Mixed Model analysis | ||||||||||||
Comparison groups |
DHCL v SHCL
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Number of subjects included in analysis |
26
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Analysis specification |
Pre-specified
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Analysis type |
superiority | ||||||||||||
P-value |
= 0.18 | ||||||||||||
Method |
Mixed models analysis | ||||||||||||
Confidence interval |
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End point title |
Mean glucagon dose | ||||||||||||
End point description |
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End point type |
Secondary
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End point timeframe |
0-33 hours
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No statistical analyses for this end point |
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Adverse events information
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Timeframe for reporting adverse events |
Adverse events were only reported while using the closed-loop systems, e.g. 0-33 hours during each study visit.
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Assessment type |
Systematic | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dictionary used for adverse event reporting
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Dictionary name |
RedCap | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dictionary version |
12.03.02
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Reporting groups
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Reporting group title |
SHCL: Single-hormone
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Reporting group description |
- | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reporting group title |
DHCL: Dual-hormone
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Reporting group description |
- | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Frequency threshold for reporting non-serious adverse events: 1% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Substantial protocol amendments (globally) |
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Were there any global substantial amendments to the protocol? No | |||
Interruptions (globally) |
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Were there any global interruptions to the trial? No | |||
Limitations and caveats |
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Limitations of the trial such as small numbers of subjects analysed or technical problems leading to unreliable data. | |||
None reported |