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Global cognition after 2 years according to baseline omega-3 fatty acid concentration. The interaction between omega-3 tertiles and B vitamin treatment was significant (p = 0.09). In the B vitamin group, global cognition score in the 3rd tertile of omega-3 was higher than in 1st tertile (p = 0.035). See Table 2. Columns show mean scores and error bars indicate SEM.
