What is the definition of a confounder in primary literature evaluation?
QUESTION
What is the difference between intention-to-treat and per-protocol analyses?
QUESTION
What does it imply when a 95% CI for a risk ratio includes 1?
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ANSWER
Not statistically significant at α=0.05. Inclusion of 1 in the 95% CI for RR suggests no significant difference between groups, as it encompasses no effect.