MAPT and obstructive sleep apnea syndrome: Before and after correcting gender, age, years of education, ESS score, severe OSAHS, smoking and alcohol consumption, the levels of Aβ40, Aβ42, and tau protein in the abdominal obesity group were significantly higher than those in the non-to-moderate OSAHS group (279.47 ± 108.93 vs. 166.98 ± 94.56, P = 0.004, P1 = 0.001; 203.44 ± 86.52 vs. 141.62 ± 77.18, P = 0.048, P1 = 0.006; and 32.62 ± 16.08 vs. 17.29 ± 14.26, P = 0.008, P1 = 0.004, respectively) (Figures 3(a)–3(c)).