Effect of inhaled insulin on patient-reported outcomes and treatment preference in patients with type 1 diabetes.
OBJECTIVE
To compare patient-reported outcomes and treatment preference between preprandial inhaled insulin and preprandial subcutaneous (SC) insulin in the context of a clinical trial of crossover design with a primary objective of comparing HbA(1C) between groups.


METHODS
Multi-center, randomized, open-label, two-arm crossover trial conducted in the US and Canada with two 12-week periods comparing preference between preprandial human insulin inhalation powder (HIIP; AIR inhaled insulin) and preprandial SC insulin (regular human insulin or insulin lispro) in patients with type 1 diabetes. Patients received HIIP plus insulin glargine during period 1 and SC insulin plus insulin glargine during period 2, or the reverse sequence.


METHODS
SF-36 Vitality Subscale, Diabetes Symptom Checklist-Revised subscales, Diabetes Treatment Satisfaction Questionnaire, Insulin Delivery System Questionnaire, HIIP-specific questionnaire, preference question.


RESULTS
Of 137 patients entered, 119 completed the study (54% female, mean age 40.9 +/- 12.4 years, mean HbA(1C) 8.1 +/- 1.0%). Patients had significantly greater treatment satisfaction and more positive evaluation of their insulin delivery system (easier to control blood sugar, less lifestyle impact) with HIIP than with SC insulin (all p < 0.01). Patients preferring HIIP (80%) were significantly more confident about (p = 0.005) and comfortable with (p = 0.003) using the system than those preferring SC insulin. Results may not be generalizable to all patients with type 1 diabetes.


CONCLUSIONS
Some patients desire alternatives to insulin injection. In this study 80% preferred HIIP to injected insulin. Other patients feel more comfortable with familiar insulin delivery. Healthcare providers should help patients find insulin delivery that corresponds to individual preferences.
Hayes
Risa P
RP
Global Health Outcomes, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN 46285, USA. hayes_clarice@lilly.com
Muchmore
Douglas
D
Schmitke
Jennifer
J
D000280:Administration, Inhalation; D000328:Adult; D018592:Cross-Over Studies; D003922:Diabetes Mellitus, Type 1 / Q000188:drug therapy*; D005260:Female; D006442:Glycated Hemoglobin / Q000032:analysis; D006801:Humans; D007004:Hypoglycemic Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D007279:Injections, Subcutaneous; D007328:Insulin / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000627:therapeutic use*; D000069036:Insulin Glargine; D061268:Insulin Lispro; D049528:Insulin, Long-Acting; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction / Q000706:statistics & numerical data*; D011208:Powders; D011795:Surveys and Questionnaires; D016896:Treatment Outcome
D006442:Glycated Hemoglobin; D007004:Hypoglycemic Agents; D007328:Insulin; D000069036:Insulin Glargine; D061268:Insulin Lispro; D049528:Insulin, Long-Acting; D011208:Powders