In the Conclusions/interpretation section of the Abstract, the following, potentially misleading, text has been changed: Original wording: ‘Public health screening for islet autoantibodies found 0.027% of children to have undiagnosed clinical type 1 diabetes and 0.038% to have undiagnosed presymptomatic type 1 diabetes. Of the latter group, our novel likelihood ratio score predicted approximately 50% to be at risk of developing clinical type 1 diabetes within 2 years.’ Modified wording: ‘Public health screening for islet autoantibodies found 0.027% of children to have undiagnosed clinical type 1 diabetes and 0.038% to have undiagnosed presymptomatic stage 2 or stage 1b type 1 diabetes, with 50% risk to develop clinical type 1 diabetes within 2 years.’ The original article has been corrected.