When the criterion of at least two prescriptions for insulin/insulin analogues to indicate type 1 diabetes was relaxed to at least one prescription for insulin/insulin analogues, the prevalence among children with CAs increased slightly from 0.08 to 0.09 (95% CI 0.03–0.17) per 100 child-years by the end of follow-up (mean 6.2 years). Here, INS is linked to type 1 diabetes mellitus.