Following covariation for age alone on the ‘use of strategies to aid memory’ measure, there was a highly significant effect of GROUP ( F [2,444] = 29.0, p < 0.001, corrected p < 0.1), no significant effect of SEX ( F [1,444] = 3.32, p = 0.07), and no GROUP × SEX interaction ( F [2,444] = 0.042, p = 0.96).
When adjusting for both age and K10 scores, the pattern of results remained identical apart from the fact that the difference between XLI and IV groups did not quite reach significance ( p = 0.074); after additional adjustment for highest education level the results did not change further.
p ‐Values <0.05 were regarded as being nominally significant with GROUP p ‐values <0.1 on the memory measures after Benjamini–Hochberg adjustment regarded as surviving correction for multiple comparisons.