Continuous glucose monitoring for seafarers with insulin-dependent diabetes
Official title: The Seafarers' Continuous Glucose Monitoring Systems Study
Run by University of Surrey · NCT07251257 · Data updated 2026-11-12
This will try using real-time continuous glucose monitors for seafarers who take insulin to see if they can better track and manage glucose and record diabetes events while working at sea.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 50 (estimated) |
| Sponsor | University of Surrey Academic / other |
| Locations | 1 site (Guildford, Surrey) |
| Status | Recruiting |
| Started | November 20, 2025 |
| Main results expected | March 1, 2027 |
| Study ends | April 1, 2027 |
| Registry record updated | January 6, 2026 |
| Trial ID | NCT07251257 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are seafarers on insulin replacement therapy who hold a valid ML5 or ENG1 certificate and are willing to wear a CGM and log readings and events in the Fishers Watch app for 12 months.
✕Probably not a fit
People not working at sea, those not treated with insulin, or those unable or unwilling to use a CGM or smartphone app are unlikely to get benefit from this project.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This is an observational feasibility project enrolling seafarers who require insulin and hold a valid ML5 or ENG1 certificate, following them for 12 months. Participants who already use a real-time CGM may contribute their own device data, and all participants will be provided with a CE-marked Dexcom G7 for use during the year. A progressive web app (Fishers Watch) and questionnaires will be used to log glucose readings, hypoglycaemic/hyperglycaemic episodes, on- and off-duty periods, and related activities to support analysis. Data collection is designed to describe glucose patterns and the practicality of CGM use in the seafaring work environment rather than to test a new intervention.
Why it matters
Potential benefit: If successful, this could help insulin-treated seafarers reduce hypoglycaemia risk and improve safety and documentation while working at sea.
How similar studies have gone: Real-time CGM use has improved glucose management in insulin-treated populations generally, but targeted research specifically among seafarers is limited and this application is relatively novel.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria:• * Any ethnicity * Seafarers requiring insulin replacement therapy, * Holding a valid ML5 or ENG1 certificate * Able and willing to wear a Continuous Glucose Monitoring system (GCMS) for 12 months * Able and willing to document out of range glucose values and activities in Fishers Watch App a while at sea Exclusion Criteria: * Outside of the stated age range. * Not able to use using a CGM glucose monitoring system for monitoring the glucose levels.
Where it's running
-
University of Surrey FHMS Nutritional Sciences
Guildford, Surrey, United Kingdom Recruiting
Study contacts
- Principal investigator: David L Russell-Jones, MD — University of Surrey
- Study coordinator: Fariba Shojaee-Moradie, Ph.D.
- Email: f.shojaee-moradie@surrey.ac.uk
- Phone: +441483464049
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.