Obstructive sleep apnea among patients with type 2 diabetes : prevalence and effect on glycemic control

Abstract EN

Obstructive sleep apnea (OSA) is a highly prevalent comorbidity of type 2 diabetes.

The aim of this work is to determine the risk of OSA in patients with type 2 diabetes and its effect on the glycemic control.

Patients andMethods: This study was conducted at Assiut UniversityHospital Sleep Unit, 52 patients with type 2 diabetes were included, all patients underwent an overnight polysomnography (PSG) and glycosylated hemoglobin(HbA1c)measurement.

Results: A total of 62% (n=32) of patients with type 2 diabetes had OSA(apnea-hyponea index (AHI) ≥ 5 events/hour).

27% (n=14) of patients had mild OSA(5≤AHI <15) , 19% (n=10) had moderate OSA (15 ≤ AHI <30) and 16% (n=8) had severe OSA (AHI ≥30).

There was a significant positive correlation of HbA1c levels with apnea hypopnea index, a widely accepted marker of the severity of OSA (P<0.001).

Also, we found that increasing OSAseverity was correlated with increasing HbA1c levels (p<0.001).

The mean HbA1c values were 8.2% for those without OSA, 9.4% for mild OSA, 10.1% for moderate OSA and 10.6% for severe OSA.

Conclusion: We concluded that the prevalence of OSA in this study was 62% and increasing severity of OSA is associated with poorer glycemic control.

Therefore, identifying and treating OSAin patients with type 2 diabetes may improve their glycemic control.-