Efficacy and safety of a carbohydrate-counting smartphone application in type 1 diabetes

An open-label, multicenter, randomized-controlled trial to evaluate the efficacy and safety of a carbohydrate-counting smartphone application with food image recognition system in patients with type 1 diabetes - CARB-LIFE

Status

Recruiting

Phases

Phase 2

Study type

Interventional

Source

JPRN

Registry ID

JPRN-jRCTs042210167

Enrollment

Registered

2022-03-23

Start date

2022-05-25

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Type 1 diabetes Glucose, insulin treatment, insulin secretion

Interventions

Usage of a carbohydrate-counting smartphone application with food image recognition system

Smartphone application, carbohydrate-counting

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Patients with type 1 diabetes (acute onset, slowly progressive, and fulminant type 1 diabetes) 2. Patients who have a smartphone (iPhone: iOS12 or later) 3. HbA1c < 10.0% 4. Fasting C-peptide <0.6 ng/ml 5. Patients who recieved caobohydrate-counting instruction at least once

Exclusion criteria

Exclusion criteria: 1. Patients who are participating other clinical trials using glucose-monitoting devices 2. Patients who are not able to keep appointments to come to their hospitals 3. Patients who have any addictions (dependences) or psychotic disorders

Design outcomes

Primary

Measure	Time frame
Percentages of the time in targeted glucose range (TIR) 24 weeks after intervention	—

Secondary

Measure	Time frame
1. Percentages of the time in targeted glucose range (TIR) 12 weeks after intervention 2. Percentages of the time above targeted glucose range (TAR) 12 and 24 weeks after intervention 3. Percentages of the time below targeted glucose range (TBR) 12 and 24 weeks after intervention 4. Values of HbAc and glycated albumin 12 and 24 weeks after intervention 5. Total daily doses of insulin administration 12 and 24 weeks after intervention 6. Body weight and body mass index (BMI) 12 and 24 weeks after intervention 7. Changes in DTR-QOL scores between before and 24 weeks after intervention	—

Measure

Time frame

1. Percentages of the time in targeted glucose range (TIR) 12 weeks after intervention 2. Percentages of the time above targeted glucose range (TAR) 12 and 24 weeks after intervention 3. Percentages of the time below targeted glucose range (TBR) 12 and 24 weeks after intervention 4. Values of HbAc and glycated albumin 12 and 24 weeks after intervention 5. Total daily doses of insulin administration 12 and 24 weeks after intervention 6. Body weight and body mass index (BMI) 12 and 24 weeks after intervention 7. Changes in DTR-QOL scores between before and 24 weeks after intervention

—

Contacts

Public ContactDaisuke Chujo

Ichikawa Hospital, International University of Health and Welfare

chujo-daisuke-rv@ihwg.jp+81-47-375-1111

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026