SELP and obstructive sleep apnea syndrome: P-selectin was significantly higher in obese OSA patients (BMI ≥ 30 kg/m2, N = 26, 29.9/8.4–56.8/ng/ml) compared to non-obese patients (N = 25, 13.7/8.5–38.3 ng/ml, p = 0.003).