Questioning Medicine

Davidson KW et al. Screening for prediabetes and type 2 diabetes: US Preventive Services Task Force recommendation statement. JAMA 2021 Aug 24; 326:736. (https://doi.org/10.1001/jama.2021.12531)  The Task Force found moderate-certainty evidence that screening is beneficial for nonpregnant adults (age range, 35–70) who are overweight (i.e., body-mass index [BMI], ≥25 kg/m2) or obese (BMI, ≥30 kg/m2) and have no symptoms of diabetes. Referring patients for, or directly providing, effective preventive interventions is recommended (B recommendation).  The main change from the 2015 recommendation is the lower age threshold for screening — 35 rather than 40. The decision was made because of the increasingly younger age of onset for diabetes and the known benefits of intervention at a wide range of ages. Notably, the USPSTF found little direct evidence that screening improves clinical outcomes;   Lifestyle modifications and metformin are considered appropriate interventions for preventing or delaying onset of diabet