5b. Compare your answers in Question 5a to the relative risk and risk difference presented in Table 1. Are the measures of association biased due to loss to follow-up? If the measures are biased, what direction is the bias (e.g. toward or away from the null; positive or negative bias)? (2 points)

5a. Non-differential loss the follow-up: retention is associated with the exposure but not the outcome. Overall, 50% of those with systolic blood pressure 2 126 mmHg were lost to follow up, while only 35% of those with systolic blood pressure