CRP and obstructive sleep apnea syndrome: Interestingly, MRS-CRP is the only metric, modeled as exposure, to show statistically significant associations with REI (1.11 [0.36, 1.86]), minimum (−0.56 [−1.05, −0.08]) and average (−0.10 [−0.17, −0.04]) SpO2 (%) (Fig. 3A), implying that MRS-CRP correlates positively with OSA severity.