"When studied in a large randomized controlled trial, digital CBT tailored to the individual reduced blood sugar levels, while also reducing the need for intensified medication use and improving blood pressure and body weight," said Marc P. Bonaca, MD, MPH, professor of medicine and director of vascular research at the University of Colorado School of Medicine in Aurora, Colorado, and the study's principal investigator. Digital CBT also had a positive effect on patient-reported outcomes, including depression and quality of life scores over six months, he said.