Abstract:Objective To analyze the correlation between the level of glycosylated hemoglobin (HbA1c) and the concentration of bone metabolic markers in male patients with type 2 diabetes mellitus (T2DM). Methods A total of 432 male patients with T2DM who were hospitalized from May 2018 to May 2019 were retrospectively analyzed. According to the level of HbA1c, the patients were divided into high HbA1c group (HbA1c ≥ 7%) with 342 cases and low HbA1c group (HbA1c < 7%) with 90 cases. Data of general characteristics, blood-sugar-related indicators and bone metabolic markers of two groups of patients were collected, and the differences in these indexes between the two groups were compared. Pearson correlation analysis was used to observe the correlation between HbA1c and 25 (OH) D, osteocalcin (OCN), total procollagen type I intact N-terminal propeptide (TP1NP), and beta-CTX. Results There was no significant difference in age, BMI and course of disease between the two groups (P?>?0.05). The fasting blood glucose (FBG) and 2-hour postprandial blood glucose (2?hPBG) levels in the high HbA1c group were higher than those in the low HbA1c group (P?0.05). The fasting insulin (FINS) level was lower than that in the low HbA1c group (P?0.05). The OCN level in the high HbA1c group was lower than that in the low HbA1c group (P?0.05). There were no significant differences in the levels of 25 (OH) D, TP1NP and beta-CTX between the two groups (P?>?0.05). HbA1c was negatively correlated with OCN (r?= 0.162, P?0.05), but had no correlation with 25 (OH) D, TP1NP and beta-CTX (P?>?0.05). Conclusions There is a negative correlation between glycosylated hemoglobin and osteocalcin in male patients with type 2 diabetes mellitus.