Emerging adulthood (EA), between 18 and 30 years of age, represents a high-risk period for patients with type 1 diabetes mellitus (T1DM). [1][2][3][4] Loss-to-follow-up rates (no appointment for >12 months) range from 25% to 40% up to years after discharge from pediatrics among T1DM EA patients, 3,5 which can compromise patient education and complication screening, and result in worsened glycemic control 6,7 and increased hospitalizations rates. 8 This study aims to understand transition care quality gaps in an interdisciplinary T1DM EA clinic in a large Canadian city. | MATERIALS AND METHODSThis study was undertaken in an interdisciplinary T1DM EA (18-25 years) program at an academic, ambulatory hospital in Toronto, Canada, consisting of four endocrinologists, two nurses, one dietician, and one social worker.A baseline audit of nonattendance rates of new and follow-up T1DM EA was conducted between February 1, 2015 and September 30, 2016, from the hospital's electronic medical record system (Epic©). Nonattendance was defined as all missed scheduled appointments (no-shows and cancellations <24 h) plotted monthly on a statistical P-chart.A retrospective chart review was conducted on all consecutive new patients referred to the EA program from February 1, 2015 to September 30, 2015. Information was collected for 1) demographic information, 2) attendance data, 3) glycemic/metabolic control, 4) routine screening (per Diabetes Canada Clinical Practice Guidelines [CPG] 9 ), 5) acute diabetes complications, and 6) counseling documentation. 9Descriptive analyses were utilized with continuous variables reported as medians (interquartile range [IQR]) and categorical variables reported as percentages. χ 2 testing was used to compare categorical outcomes and Mann-Whitney U test to compare medians assessed for significance (p < 0.05).