Wireless Innovation for Seniors With Diabetes Mellitus

Reducing hypoglycemia is an important aspect of management of T1D in older adults, many of
whom have hypoglycemic unawareness, cognitive impairment, or both. CGM offers the opportunity
to reduce hypoglycemia and its related complications such as fractures from falls and
hospitalizations and improve quality of life including reducing hypoglycemic fear and
diabetes distress. Despite these potential benefits, CGM is used by only a small proportion
of older adults with T1D. Previous studies assessing CGM efficacy have included only a small
number of adults ≥ 60 years of age, excluded patients most prone to severe hypoglycemia,
focused on improving HbA1c rather than hypoglycemia, and used older generation CGM sensors.
These studies are not generalizable to the population of older adults with T1D. The potential
benefit of CGM in reducing hypoglycemia in the older adult population has not been well
studied. The goal of this study is to assess the potential benefits and risks of CGM in older
adults with T1D.

Inclusion Criteria:

To be eligible for the study, all participants must meet the following criteria:

1. Clinical diagnosis of insulin dependent presumed autoimmune type 1 diabetes by the
investigator and meeting at least one of the following criteria:

i. Age > 6 months and < 10 years old at diagnosis OR ii. Positive pancreatic
autoantibodies at any time (GAD-65, IA-2, ICA or ZnT8) or positive anti-insulin
autoantibody at diagnosis only (within 10 days of starting insulin) OR iii. Presence
of 2 or more of the following clinical indicators suggestive of type 1 diabetes:

1. Age at diagnosis < 40 years

2. Non-obese at diagnosis according to BMI (< 95th percentile pediatric and < 30
kg/m2 adult)

3. Diabetic ketoacidosis (DKA) at any time,

4. Plasma C-peptide level < 0.8 ng/ml (with blood glucose > 80 mg/dL if available)
at any time

5. Family history of type 1 diabetes in a first degree relative (parent, sibling, or
child).

2. Age ≥60 years

3. HbA1c <10.0% at screening or within 30 days prior to screening visit (the upper limit
was selected as a surrogate measure of likelihood of adherence to the protocol with
the belief that those with higher HbA1c levels are generally noncompliant with
diabetes management and thus not good candidates for the trial)

4. Insulin regimen involves either use of an insulin pump (a minimum of 40% of study
population) or multiple daily injections of insulin (minimum of 40% of study
population).

5. Participant is able to manage his/her diabetes with respect to insulin administration
and glucose monitoring (which may include assistance from spouse or other caregiver)

6. Participant understands the study protocol and agrees to comply with it

7. Participant comprehends written and spoken English

8. At least 240 hours (10 out of 14 days) of sensor glucose data with appropriate number
of calibrations from the blinded CGM pre-randomization phase

Exclusion Criteria:

Individuals meeting any of the following exclusion criteria at baseline will be excluded
from study participation.

1. Use of unblinded CGM, outside of a research study, as part of real-time diabetes
management in the last 3 months

2. At least 10% of time spent with sensor glucose levels < 54 mg/dl during the blinded
CGM screening period AND a severe hypoglycemic event in the past 6 months (a severe
hypoglycemic event that required assistance of another person due to altered
consciousness, and required another person to actively administer carbohydrate,
glucagon, or other resuscitative actions (see section 8.1).

3. Extreme visual or hearing impairment that would impair ability to use real-time CGM
assessed at screening visit

4. Known adhesive allergy or skin reaction during the blinded CGM pre-randomization phase
that would preclude participation in the randomized trial

5. Plans to begin non-insulin medication for blood glucose lowering during the course of
the study

6. Stage 4 or 5 renal disease or most recent GFR < 30 ml/min/m2 from local lab within the
past 6 months

7. The presence of a significant medical or psychiatric condition or use of a medication
that in the judgment of the investigator may affect completion of any aspect of the
protocol, or is likely to be associated with life expectancy of <1 year.

8. Clinical diagnosis of dementia (cognitive impairment that is mild and not considered
sufficient for diagnosis of dementia is acceptable)

9. Need for use of acetaminophen or acetaminophen-containing products on a regular basis
during the 6 months of the trial (unless stipulation no longer required with use of
newer generation sensors)

10. Inpatient psychiatric treatment in the past 6 months

11. Participation in an intervention study (including psychological studies) in past 6
weeks.

12. Expectation that participant will be moving out of the area of the clinical center
during the next 6 months, unless the move will be to an area served by another study
center.