Clinical trial Recruiting at 1 site Observational Ages 18 to 75

Exploring how sleep patterns affect diabetes management

Official title: Chronotype of Patients With Diabetes and Effect on Glycaemic Control: The CODEC Study

Run by University of Leicester · NCT02973412 · Data updated 2026-11-12

This study is trying to see how different sleep patterns affect diabetes management in people aged 18 to 75 who have been living with diabetes for over six months.

Quick facts

Study typeObservational
Ages18 Years to 75 Years
SexAll
Enrollment3447 (estimated)
SponsorUniversity of Leicester
Academic / other
Locations1 site (Leicester)
StatusRecruiting
StartedDecember 7, 2016
Main results expectedDecember 31, 2027
Study endsDecember 31, 2027
Registry record updatedFebruary 15, 2024
Trial IDNCT02973412 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are adults aged 18-75 with Type 1 or established Type 2 diabetes who are managing their condition with therapy or lifestyle changes.

Probably not a fit

Patients with significant sleep disorders other than Obstructive Sleep Apnoea or those with terminal illnesses may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study aims to investigate the relationship between chronotype, which refers to an individual's natural sleep-wake cycle, and glycaemic control in patients with Type 1 and Type 2 diabetes. It will assess how sleep patterns may influence cardiometabolic health and various lifestyle factors in individuals diagnosed with diabetes. The study will include participants aged 18 to 75 years who have been diagnosed with diabetes for over six months and are currently managing their condition with glucose-lowering therapy or lifestyle modifications. By understanding these associations, the study seeks to identify new approaches to enhance diabetes management.

Why it matters

Potential benefit: If successful, this study could lead to improved diabetes management strategies tailored to individual sleep patterns.

How similar studies have gone: While there has been growing interest in the impact of sleep on diabetes management, this specific approach exploring chronotype in relation to glycaemic control is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Participant is willing and able to give informed consent for participation in the study
2. T1DM or established T2DM (\>6months since diagnosis)
3. Male or Female
4. Aged 18-75 years inclusive
5. BMI less than or equal to 45kg/m² inclusive
6. No known sleep disorders except Obstructive Sleep Apnoea (OSA)
7. On any glucose-lowering therapy (T1DM or T2DM) or lifestyle modification for management of T2DM
8. Good command of the English language

Exclusion Criteria:

1. Participant is unwilling or unable to give informed consent
2. Anyone without a good command of the English language
3. Anyone \<18 years of age and \>75 years of age
4. BMI greater than 45 kg/m²
5. A regular cannabis user i.e. weekly use
6. Have a terminal illness
7. A known sleep disorder that is not OSA
8. Regular use of the following medicines i.e. Weekly use: (Wakefulness promoting agents Modafinil, Amphetamine derivatives, Methylphenidate; Sedatives including benzodiazepines, Z-drugs (zopiclone, zolpidem \& zaleplon); Melatonin, including Circadin and melatonin analogues; Clonazepam and other drugs for nocturnal movement disorders).

Where it's running

  • Leicester Diabetes Centre, Leicester General Hospital
    Leicester, United Kingdom
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.