Park HB, Gwark JY, Kam M, et al. - This study was carried out to assess whether and how normoglycemic fasting glucose levels are correlated with idiopathic adhesive capsulitis (IAC). Researchers conducted a case-control study comprising a group of 151 individuals with IAC without intrinsic shoulder lesions, extrinsic causes, or known metabolic risk factors such as diabetes, dyslipidemia, and thyroid dysfunction. A total of 453 age- and gender-matched persons were comprised in the control group seeking general check-ups at the authors’ health promotion center during the same period as the case group. There was a positive correlation between IAC and fasting glucose levels of 90-99 mg/dL, which are currently considered normoglycemic.