Correlation of mean platelet volume and red blood cell distribution width with obstructive sleep apnoea syndrome severity.

INTRODUCTION

Mean platelet volume (MPV) and red blood cll distribution width (RDW) have been assosiated with sleep apnea syndrome severity.

OBJECTIVE

To investigate the correlation of mean platelet volume and red blood cell distribution width with obesity sleep apnoea syndrome (OSAS) severity.

METHODS

Ninety patients underwent PSG. Patients with an apnoea-hypopnoea index (AHI) <5 were used as controls. Patients with AHI >5 were divided into mild: 5 ≤ AHI <15, moderate: 15≤ AHI <30 and severe OSAS: AHI ≥30. Patients >65 years, with body mass index (BMI) >40, central sleep apnoea syndrome, cardiovascular or other significant comorbidities were excluded. Blood sample collection occurred one day before polysomnography (PSG).

RESULTS

Sixty-four patients were included in our study. Fifty-seven (89.1%) had OSAS (16% mild, 25% moderate and 48.4% severe) while the remaining 7 (10.1%) were used as controls. MPV was similar among groups [8.1 (7.1, 9.2) vs 7.9 (6.8, 10.1) vs 8.5 (7.4, 9.1) vs 8.4 (7.6, 9.7), P = .930 for control, mild, moderate and severe OSAS, respectively]. RDW did not differ between OSAS patients and control [median (IQR) 14.4 (13.4, 15.3) vs 14.0 (13.5, 16.7), P = .950], while there was no significant difference among different stages of OSAS severity [14.0 (13.5, 16.7) vs 13.9 (11.4, 14.8) vs 14.4 (14.0, 15.3) vs 14.4 (13.3, 15.6), P = .517] for control, mild, moderate and severe OSAS, respectively.

CONCLUSION

OSAS patients have elevated levels of RDW and MPV compared to controls; however, there was no association between OSAS severity and MPV or RDW.