The Associations of Platelet Activation and Coagulation Parameters with Obstructive Sleep Apnoea: A Large-Scale Observational Study

Figure 1

Restricted cubic spline regression of the nonlinear relationship between abnormal coagulation (including platelet distribution width (PDW), activated partial thromboplastin time (APTT), and thrombin time (TT) data) and the severity of obstructive sleep apnoea (OSA). The x-axis represents the continuous values of the apnoea-hypopnea index (AHI), oxygen desaturation index (ODI), or arterial oxygen saturation (SaO₂). The left y-axis represents the log odds of abnormal coagulation for each coagulation marker. The right y-axis represents the number of patients.