A bidirectional relationship between sleep disturbance and diabetes mellitus (DM) has been reported. This cross-sectional study analyzed 209 outpatients with DM who visited our hospital between January 2017 and December 2018. We investigated the sleep condition by a questionnaire using the 3-Dimensional Sleep Scale (3DSS). Sleep quality in DM patients was significantly lower than that in healthy subjects. A multivariate analysis was performed which included the results of each item in the 3DSS as outcome variables in DM patients. Sleep phase was positively correlated with patient's age, and was advanced among elderly patients. Sleep quality proved to be markedly low in patients complaining of nocturia and users of hypnotic agents, and was significantly low in patients with leg cramps and female patients. Sleep quantity was inversely corelated with HbA1c, and was significantly low in patients with leg cramps and female patents. Sleep disturbance in DM patients was evident in the present observational study, and multi-dimensional approaches including treatment to alleviate neuropathy or urological intervention seem to be warranted.
We experienced a case of variant hemoglobin that was discovered after the onset of acute-onset type 1 diabetes mellitus. In this case, HbA1c was able to be properly measured by the enzymatic method, but extremely low values of HbA1c and an abnormal peak that was likely caused by variant hemoglobin were observed on high-performance liquid chromatography. The variant hemoglobin was identified as Hb Hoshida [β43 Glu (GAG) →Gln (CAG) ]. Hb Hoshida is a genetic abnormality of the hemoglobin beta chain that was first reported by Iuchi et al. from Japan in 1978 and has since been reported in several cases associated with diabetes mellitus. In cases with type 1 diabetes mellitus, the existence of variant hemoglobin may cause difficulty in differentiating between acute-onset type 1 diabetes mellitus and fulminant type 1 diabetes mellitus, which requires special attention. In the outpatient setting, glycated albumin, intermittently scanned continuous glucose monitoring and continuous glucose monitoring may be useful for glycemic control.