Table 1.

Model inclusion table

Variable	Model 1	Model 2	Model 3	Model 4	Model 5	Model 6
TBV	•	•	•	•	•	•
DX	•	•	•	•	•	•
APOE ε4		•	•	•	•	•
Gender		•	•	•	•	•
Age		•			•	•
Age^2			•		•	•
Age^3				•		•
Age:DX		•			•	•
Age^2:DX			•		•	•
Age^3:DX				•		•

NOTE. Variables included in each of the six models.

Abbreviations: APOE, apolipoprotein E; TBV, time between consecutive visits; DX, current diagnostic group, interaction between two variables.