Diabetes Screening: Detection and Application of Saliva 1,5-anhydroglucitol by Liquid Chromatography-mass Spectrometry.

Unlike other commonly used invasive blood glucose monitoring methods, saliva detection prevents patients from suffering the physical uneasiness. However, there are few studies on saliva 1,5-anhydroglucitol (1,5-AG) in patients with diabetes mellitus (DM).This study aimed to evaluate the effectiveness of saliva 1,5-AG in diabetes screening in a Chinese population.This was a population-based cross-sectional study. A total of 641 subjects without a valid diabetic history were recruited from September 2018 to June 2019. Saliva 1,5-AG was measured with liquid chromatography-mass spectrometry.Saliva 1,5-AG levels in DM subjects were lower than those in non-diabetes mellitus subjects (both P < 0.05). Saliva 1,5-AG was positively correlated with serum 1,5-AG and negatively correlated with blood glucose and glycated hemoglobin (HbA1c) (all P < 0.05). The optimal cutoff points of saliva 1,5-AG0 and 1,5-AG120 for diabetes screening were 0.436 g/mL (sensitivity: 63.58%, specificity: 60.61%) and 0.438 g/mL (sensitivity: 62.25%, specificity: 60.41%), respectively. Fasting plasma glucose (FPG) combined with fasting saliva 1,5-AG reduced the proportion of people who required an OGTT by 47.22% compared with FPG alone.Saliva 1,5-AG combined with FPG or HbA1c improved the efficiency of diabetes screening. Saliva 1,5-AG is robust in nonfasting measurements and a noninvasive and convenient tool for diabetes screening.

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