APOE and dementia: The strengths of this paper are that it (1) used a powerful data-driven approach (LCA) to detect subgroups from a heterogeneous population, (2) examined the utility of a combined conceptualisation of resilience based on both cognitive trajectory and dementia status and (3) examined whether other protective factors not included in previous studies such as diet, contributed to resilience in APOE ɛ4 positive individuals.