In addition to showing that Mg levels were lower in patients with OSA, the study also showed that patients with OSA had substantially higher plasma C-reactive protein (CRP) concentrations than controls (7.6 ± 1.3 g/dL in OSA group with n = 68, 2.7 ± 1.5 g/dL in control group with n = 30, p < 0.0001). The gene discussed is CRP; the disease is obstructive sleep apnea syndrome.