The 1-min animal test as a mental status screening examination in patients with diabetes.

A cut-off score of 13/14 on the OMAT balanced the sensitivity closest to 1.00 and allowed for the highest specificity for the HDS-R not only among all the patients, but also among just the patients aged ≥ 65 years. The OMAT may be an optimal screening test to determine whether to proceed with further diagnosis using HDS-R.Trial registration UMIN UMIN000025260. This study is retrospectively registered on December 13th, 2016.