A number showing how much an outcome changes per one-unit change in a predictor.
In regression analysis, the beta coefficient (β) quantifies the strength and direction of the relationship between a predictor variable and an outcome, holding other variables constant. Unstandardised betas are in the outcome's original units, while standardised betas allow comparison of predictor importance across variables measured on different scales. Clinicians should check which form is reported, as this affects interpretation.
This guide was auto-drafted and is pending editorial review.