ClinicalTrials.gg
WithdrawnNCT03315663Updated May 16, 2019

Personalized Smartphone-assisted Coaching System to Improve Glucose Homeostasis in Adults With Prediabetes - Main Study

An interventional study of Sweetch App & DBWS and Sweetch App Alone in Prediabetes, Hyperglycemia and Postprandial Hyperglycemia, sponsored by Johns Hopkins University. Withdrawn at 2 sites in United States. Open to participants aged 18 Years to 75 Years. Per ClinicalTrials.gov, last updated 2019-05-16.

Sponsored by Johns Hopkins University · Not applicable, Interventional, and Supportive care

Why this study was withdrawn
The study was withdrawn due to budgetary and other constraints.

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Phase
Not applicable
Study type
Interventional
Enrollment
0
Allocation
Randomized
Ages
18 Years to 75 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-15

Among 12 studies in Prediabetic State by Johns Hopkins University — 4 open to participants now, 4 under way, none of them phase 3. Prediabetic State · Johns Hopkins University.

Enrollment
12th of 12
0 · median 65
Started
2017
the only one that year
No phase
11 of 12
4 open now
Registered
3rd of 12
by date

Among the 12 studies in Prediabetic State by Johns Hopkins University, this one is the 12th largest by enrollment, is the only one that started in 2017, is one of 11 with no phase, and was the 3rd registered.

Prediabetic State

918 studies on the registry are indexed under Prediabetic State; 231 are open to participants now.

Browse Prediabetic State studies →

Open to participants now

4 of the 12 studies in Prediabetic State by Johns Hopkins University are open now, in 1 country. Recruiting first, the newest first:

By country, each count listing its studies:

All 4 open studies →

Where they have run

Who these studies take

Of the 144 Prediabetic State studies recruiting now, 51 (35%) set no upper age limit and 83 (58%) stop at 75 or younger; 12 take children under 18; 54 take healthy volunteers.

This study: 18 Years to 75 Years · all sexes · no healthy volunteers.

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02

Study summary

Sweetch is a personalized mobile-health platform coaching system (mobile phone app) designed to promote adherence to physical activity guidelines for people with prediabetes.

Read the detailed description

The mobile phone app Sweetch seeks to increase leisure time physical activity rather than formal exercise through the use of a behavioral analytics engine that continuously process various aspects of the user's life habits, taking into account the user's demographics, behavioral change status, schedule, actual activity patterns, and more. The rationale behind this approach is that long-term adherence and patient engagement are more likely to be achieved when demands on manual user data entry are kept at a minimum. Compared to similar smartphone-assisted prevention apps, there are two novel features of the Sweetch app that may increase its efficacy. First, it uses a "just-in-time" adaptive intervention" approach that tailors recommendations to the user's day-to-day routine and his or her readiness for behavioral change. Second, and most importantly, it requires no direct involvement by the user, since all the necessary data is collected using built-in tracking pedometers, accelerometer and Global Positioning System (GPS) sensors on smartphones. In contrast, interventions that focus on dietary changes (i.e. calorie reduction, change in macronutrient content), require active user tracking at every meal, which is difficult to maintain in the long-term even with the use of sophisticated, electronic calorie counting tools. For these reasons, the Sweetch app may achieve greater long-term adherence, which is usually a limiting factor to efficacy of mobile health interventions.

03

Conditions studied

  • Prediabetes
  • Hyperglycemia
  • Postprandial Hyperglycemia
  • Impaired Glucose Tolerance
  • Impaired Fasting Glucose

Keywords

  • Mobile Health
04

Who can participate

Ages eligible
18 Years to 75 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Adults aged 18 -75 years with prediabetes (fasting Blood Glucose (BG) 100-125 mg/dl, 5.7% - 6.4%, or 2 hour BG of 140-199 mg/dl following 75-gram oral glucose tolerance test)
  • 24 - 40 kg/m2
  • English speaker
  • Smartphone user (Android or Apple 5s and above)

Exclusion criteria

Exclusion Criteria:

  • Currently doing more than 150 minutes/week of moderate/vigorous physical activity
  • Presence of medical conditions that prevent adoption of moderate physical activity
  • Use of any glucose-lowering or weight loss medications within the previous 3 months
  • Current pregnancy (self-reported) or planning pregnancy during study period (self-reported)
  • Presence of any condition that can result in spurious readings (e.g. anemia [ level below lower limit of normal] secondary to iron, vitamin B12, or folate deficiencies; hemoglobinopathies)
  • Use of systemic
  • Use of antipsychotic medications (stable doses for at least three months of anti-depressants or anti-anxiety drugs will be allowed)
  • Severe mental illness or learning disability
  • Current participation in another clinical trial
  • Liver enzymes >3 x
  • Poor literacy (REALM-R score of 6 or less)
Terms in these criteria, in plain language(5)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

HbA1c

A blood test of average blood sugar over the past two to three months, given as a percentage or in mmol/mol. 6.5% (48 mmol/mol) or more is the usual threshold for diabetes, normally confirmed by a second test.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

Hemoglobin (Hb)

The protein in red blood cells that carries oxygen. A low level is anemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

05

Study design

Phase
Not applicable
Primary purpose
Supportive care
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
0 participants (actual)

Study arms

  • Active comparator
    Sweetch App + DBWS

    Participants receive usual care for prediabetes management. In addition, participants will be randomized to receive the Sweetch app plus weight monitoring via digital body weight scale (DBWS).

    Other: Sweetch App & DBWS

  • Active comparator
    Sweetch App Alone

    Participants receive usual care for prediabetes management. In addition, participants will be randomized to receive the Sweetch app alone.

    Other: Sweetch App Alone

Interventions

  • OtherSweetch App & DBWS

    Usual care for prediabetes management, Sweetch app, weight monitoring via digital body weight scale (DBWS).

  • OtherSweetch App Alone

    Usual care for prediabetes management, Sweetch app alone.

06

What researchers measure

Primary outcomes

  1. Safety of Sweetch's PIP compared to usual care to lower A1C

    Administration of study intervention will be halted when 3 grade 3 Adverse Events (AEs) determined to be "probably related" are reported to the Data Coordinating Center (DCC). The DCC will notify study sponsor \& investigators immediately when the third grade 3 event is reported \& enrollment screens will stop accepting new study participants. Study sponsor will inform the Data Safety and Monitoring Board (DSMB) members within 24 hours of this occurrence \& will provide DSMB with AE listing reports. The DSMB will convene an ad hoc meeting by teleconference or in writing as soon as possible. The DSMB will provide recommendations for proceeding with the study to study sponsor. If Sweetch Health determines that an unanticipated adverse device effect presents an unreasonable risk to subjects, investigations or parts of investigations presenting that risk will be terminated as soon as possible.

    Time frame: 2 years

  2. Effectiveness of Sweetch's PIP compared to usual care to lower A1C

    A1C is a continuous measure expressed in units of % and mmol/mol. Change in A1C will be calculated by subtracting the 6-month result from the baseline result. The primary effectiveness endpoint will be analyzed using linear regression models, where change in A1C at 6 months will be the dependent variable and treatment group will be the primary predictor variable. The baseline value of the outcome measure will be included as a covariate.

    Time frame: 2 years

Secondary outcomes

  1. Evaluation of whether intervention increases physical activity.

    Through the use of built-in accelerometers and pedometers on smartphones, the study will evaluate the percentage of weekly activity goals (individualized per subject) achieved per subject (range from 60 minutes to 150 minutes per week), proportion of subjects achieving 150 minutes of weekly activity taken as the average of months 4-6 at the 6-month time point, and average of months 7-12 at the 12-month time point. In addition, mean minutes of physical activity per week will be evaluated over intervals between study time points. Physical activity measures will be reported only in the intervention arm, since tracking of physical activity will not be possible in the control arm.

    Time frame: 12 months

  2. Evaluation of whether intervention reduces weight.

    Users update manually or weight data is synced from the digital scale. Data points measured are net weight change from baseline to 6 and 12 months; percentage weight change from baseline to 6 and 12 months; and proportion of subjects achieving 5% body weight loss at 6 and 12 months.

    Time frame: 12 months

  3. Evaluation of whether intervention reduces waist circumference.

    Waist circumference will be measured using a flexible tape measure according to the technique recommended by the American Society for Nutrition. We will evaluate percentage change in waist circumference from baseline to 6 and 12 month time points. The null hypothesis is that there is no difference between percentage change at 6 and 12 months between the intervention and control groups and the alternative hypothesis is that there is a greater percentage change in waist circumference from baseline in the intervention group.

    Time frame: 12 months

  4. Evaluation of whether intervention reduces blood pressure.

    Blood pressure will be measured in accordance with recommendations by the American Heart Association. Changes in systolic and diastolic blood pressure from baseline to 6 and 12 months. Systolic (SBP) and diastolic blood pressure (DBP) will be evaluated as separate continuous measures. The null hypothesis is that changes in SBP and DBP are no different between groups at both time points and the alternative hypothesis is that there is a greater reduction in SBP and DBP in the intervention group. Assuming a variance of 10.1 for change in SBP38 and a change of -1 mmHg in the control arm, the study would have 83% power to detect a between-group difference of 4 mmHg in SBP, which would be considered clinically meaningful. Assuming a variance of 7 for change in DBP and a change of -1 mmHg in the control arm38, the study would have 81% power to detect a between-group difference of 2.7 mmHg in DBP, which would be considered clinically meaningful.

    Time frame: 12 months

07

Study locations

2 sites
  • Johns Hopkins Medical Institutions
    Baltimore, Maryland 21287, United States
  • Reading Health System
    Reading, Pennsylvania 19607, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Jul 2017 to primary completion in Apr 2019, 21 months.

How these figures are worked out, and which studies are left out of them.

Registered
Sep 5, 2017
First posted
Oct 20, 2017
StartActual
Jul 1, 2017
Primary completionActual
Apr 19, 2019
CompletionActual
Apr 19, 2019
Last update
May 16, 2019
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on May 16, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03315663
Collaborators
Sweetch Health, Ltd
Responsible party
Sponsor
First posted
Oct 20, 2017
Start date
Jul 1, 2017
Primary completion
Apr 19, 2019
Completion
Apr 19, 2019
Last update
May 16, 2019

Study contacts

Adrian S. Dobs, MD MHS
principal investigator · Johns Hopkins University

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is withdrawn, as verified in May 2019. You cannot join it, but the record below documents what was studied.

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