a trend towards significancep=0.010
In Model 1, lower mean S pO 2 (as a continuous variable) was associated with incidence of significant decline in FCSRT delayed free recall (OR for 1% decrease 1.21, p=0.007; corresponding to a decline of ≥3.2 points during follow-up); a trend towards significance was observed in the other models (OR 1.22, p=0.010, according to Model 2 and OR 1.22, p=0.011, according to Model 3).