Target Blood Sugar for Elderly Patients

Hospital/Inpatient Setting

The American Diabetes Association recommends target glucose levels of 140-180 mg/dL (7.8-10 mmol/L) for most elderly ICU patients 3, 4, 5
Initiate insulin therapy when glucose exceeds 180 mg/dL in elderly ICU patients 4, 6
More stringent goals of 110-140 mg/dL may be appropriate only for select patients (cardiac surgery, acute ischemic events) if achievable without hypoglycemia 4, 5
Target glucose levels of 140-180 mg/dL (7.8-10 mmol/L) are similar to ICU targets for non-ICU hospitalized patients 3, 7
These targets must be individualized based on clinical status, hypoglycemia risk, and presence of diabetes complications in non-ICU hospitalized patients 3, 7

The American Diabetes Association recommends target HbA1c levels of 7.0-7.5% for healthy elderly patients with few comorbidities and intact function 1, 2
Target HbA1c levels of <8.0% are recommended for patients with multiple coexisting chronic illnesses, 2+ instrumental activities of daily living impairments, or mild-to-moderate cognitive impairment 1, 2
Target HbA1c levels of 8.0-9.0% are recommended for patients with long-term care residence, end-stage chronic illnesses, moderate-to-severe cognitive impairment, or 2+ activities of daily living dependencies 1, 2

The evidence strongly demonstrates that tight glycemic control (HbA1c <7%) in elderly patients increases hypoglycemia risk without mortality benefit, according to the American College of Cardiology 2
Elderly patients aged ≥80 years are more than twice as likely to visit emergency departments and nearly five times as likely to be hospitalized for insulin-related hypoglycemia compared to middle-aged adults, according to the American College of Cardiology 2

Renal failure, sepsis, low albumin level, impaired counterregulatory hormone responses, and failure to perceive hypoglycemic symptoms are key risk factors for hypoglycemia in elderly patients, according to the American Diabetes Association 5

Never target HbA1c <6.5% in elderly patients, as this is associated with increased mortality without clinical benefit, according to the American College of Cardiology 2, 8
Avoid sliding scale insulin as sole regimen, as it results in undesirable hypoglycemia and hyperglycemia with increased hospital complications, according to the American Diabetes Association 6
Use basal-bolus or basal-plus regimens instead of sliding scale insulin, according to the American Diabetes Association 3, 6

Consider regimen simplification when severe or recurrent hypoglycemia occurs, wide glucose excursions are observed, cognitive or functional decline occurs, patient cannot manage complexity of insulin regimen, or significant change in social circumstances, according to the American Diabetes Association 1