Longitudinal studies have two important data typologies: single outcomes or repeated measures. Single outcome, such as death or disease onset, should have a different data treatment than those studies with repeated measures outcome. But, they have in common the detection of changes over time and the contributing factors for this change. Cohort differs from cross-sectional studies that desire only variables relationshiP , without causal effect. Fernandes et al. wrote an article entitled The RelationshiP between Lifestyle and Costs Related to […]