Effect of predicted low suspend pump treatment on improving glycaemic control and quality of sleep in children with type 1 diabetes and their caregivers: the QUEST randomized crossover study

Ulrike Schierloh, Gloria A Aguayo, Muriel Fichelle, Cindy De Melo Dias, Aljosa Celebic, Michel Vaillant, Katharine Barnard, Ohad Cohen, Carine de Beaufort, Ulrike Schierloh, Gloria A Aguayo, Muriel Fichelle, Cindy De Melo Dias, Aljosa Celebic, Michel Vaillant, Katharine Barnard, Ohad Cohen, Carine de Beaufort

Abstract

Background: In attempting to achieve optimal metabolic control, the day-to-day management is challenging for a child with type 1 diabetes (T1D) and his family and can have a major negative impact on their quality of life. Augmenting an insulin pump with glucose sensor information leads to improved outcomes: decreased haemoglobin A1c levels, increased time in glucose target and less hypoglycaemia. Fear of nocturnal hypoglycaemia remains pervasive amongst parents, leading to chronic sleep interruption and lack of sleep for the parents and their children. The QUEST study, an open-label, single-centre randomized crossover study, aims to evaluate the impact on time in target, in hypoglycaemia and hyperglycaemia and the effect on sleep and quality of life in children with T1D, comparing a sensor-augmented pump (SAP) with predictive low glucose suspend and alerts to the use of the same insulin pump with a flash glucose measurement (FGM) device not interacting with the pump.

Methods/design: Subjects meeting the inclusion criteria are randomized to treatment with the SAP or treatment with an insulin pump and independent FGM for 5 weeks. Following a 3-week washout period, the subjects cross over to the other study arm for 5 weeks. During the week before and in the last week of treatment, the subjects and one of their caregivers wear a sleep monitor in order to obtain sleep data. The primary endpoint is the between-arm difference in percentage of time in glucose target during the final 6 days of each treatment arm, measured by a blinded continuous glucose measurement (CGM). Additional endpoints include comparison of quantity and quality of sleep as well as quality of life perception of the subjects and one of their caregivers in the two different treatment arms. Recruitment started in February 2017. A total of 36 patients are planned to be randomized. The study recruitment was completed in April 2018.

Discussion: With this study we will provide more information on whether insulin pump treatment combined with more technology (SmartGuard® feature and alerts) leads to better metabolic control. The inclusion of indicators on quality of sleep with less sleep interruption, less lack of sleep and perception of quality of life in both children and their primary caregivers is essential for this study and might help to guide us to further treatment improvement.

Trial registration: ClinicalTrials.gov, NCT03103867 . Registered on 6 April 2017.

Keywords: Caregiver; Children; Flash glucose measurement; Quality of life; Sensor-augmented insulin pump; Sleep; Type 1 diabetes.

Conflict of interest statement

Ethics approval and consent to participate

A statement on ethics approval and consent is attached (Additional file 16).

The name of the Luxembourg Ethics committee is CNER (Comité national d’Ethique de Recherche).

Consent for publication

Consent forms were obtained from each participant and his participating parent.

Competing interests

The authors declare that they have no competing interests.

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Figures

Fig. 1
Fig. 1
Timeline of QUEST study
Fig. 2
Fig. 2
SPIRIT schedule of interventions and assessments

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