Interaction Flashcards
1
Q
Interaction (effect modifier)
A
Comparing one variable to another. Notion of heterogeneity ie the interaction between sex and treatment implies the effect of treatment is different between the sexes
2
Q
Tests used to detect and quantify effect
A
t-test, chi-squared, ANCOVA
3
Q
P-value
A
Composite which depends on the size of the effect but also how precisely the the effect has been estimated (SE)
4
Q
Selection of subgroups
A
Should be prespecified during trial design . Treat unanticipated subgroup findings with caution
