Insulin Correction Factor Adjustment Guidelines

Introduction to Correction Factor Adjustment

The American Diabetes Association recommends recalculating the correction factor using the formula 1500/TDD or 1700/TDD based on the current total daily insulin dose, and adjusting it if correction doses consistently fail to bring glucose into target range 1
The correction factor should be adjusted if correction doses do not consistently bring glucose into target range, rather than adjusting basal insulin doses, as stated by the American Association of Clinical Endocrinologists 1

The Endocrine Society suggests calculating the correction factor using 1500/TDD or 1700/TDD, where TDD is the total daily insulin dose, and reassessing it every 3-6 months or when significant changes in weight, activity, or overall insulin requirements occur 1, 2
The European Association for the Study of Diabetes recommends recalculating TDD periodically, every few weeks to months, to update correction factors, not daily 3

The International Diabetes Federation advises monitoring whether correction doses bring glucose into target range consistently, and tracking post-correction glucose levels 2-4 hours after administering correction insulin to assess effectiveness 1
The American College of Endocrinology suggests avoiding common errors such as adjusting basal insulin when the problem is inadequate correction dosing, and not using daily TDD recalculation for correction doses 3

The American Diabetes Association notes that duration of diabetes influences correction factor values, with longer duration typically requiring different sensitivity factors 1
The European Society of Endocrinology states that changes in clinical status, such as illness, steroid use, or changes in physical activity, may temporarily alter insulin sensitivity and require correction factor modification 4, 5
The Endocrine Society recommends that for insulin pump users, approximately 40-60% of TDD should be basal delivery, with the remainder as mealtime and correction boluses 3

The American Association of Clinical Endocrinologists advises that when basal insulin exceeds 0.5 units/kg/day and glucose remains elevated, adding prandial insulin coverage is more appropriate than continuing to escalate correction doses alone 3, 2
The International Diabetes Federation suggests that the correction factor works in conjunction with the carbohydrate-to-insulin ratio (ICR), but should be adjusted separately, and that if glucose after meals is consistently out of target, the ICR should be adjusted, while if correction doses fail to normalize glucose, the correction factor should be adjusted 1

The American Diabetes Association recommends calculating the correction factor as 1500 divided by the total daily insulin dose (TDD) to determine how much one unit of insulin will lower blood glucose above a target level 6

The correction insulin dose can be calculated using the formula: (Current glucose - Target glucose) ÷ Correction factor, as recommended by the British Journal of Anaesthesia 6
The target glucose range for non-critically ill hospitalized patients is 80-180 mg/dL, according to the American Diabetes Association 7

Rapid-acting insulin remains active for approximately 3-4 hours, and the pump or bolus calculator should estimate remaining active insulin and subtract this from the calculated correction dose, as stated by the Diabetes Care journal 8
The American College of Clinical Endocrinologists recommends accounting for "insulin-on-board" (IOB) to prevent "stacking" and hypoglycemia when administering correction insulin 6

Correction insulin should be used in addition to scheduled basal and prandial insulin, not as monotherapy, as recommended by the American Diabetes Association 9, 7
For hospitalized patients, correction insulin should be administered every 4-6 hours using rapid-acting or regular insulin, according to the Diabetes Care journal 8

Insulin pump users should have their correction factor automatically applied by the pump's bolus calculator, and may need to adjust their correction factor by time of day, as stated by the British Journal of Anaesthesia 6
Hospitalized patients receiving enteral/parenteral nutrition should have correction insulin given subcutaneously every 6 hours with regular insulin or every 4 hours with rapid-acting insulin, as recommended by the Diabetes Care journal 8

The total insulin dose can be calculated as the meal bolus (based on carbohydrate-to-insulin ratio) + Correction dose (based on correction factor) - Insulin-on-board, as recommended by the British Journal of Anaesthesia 6