Cystic Fibrosis-Related Diabetes Screening in Adults: A Gap Analysis and Evaluation of Accuracy of Glycated Hemoglobin Levels.

The rate of CFRD screening is suboptimal. An alternative screening algorithm using an A1C threshold of 5.5% has the potential to reduce the requirement for OGTTs by 36.7%. A1C levels cannot be used to identify impaired glucose tolerance.