Question 4 Which of the following study types is considered the strongest ( gold standard)? There may be more than one correct answer Selected Answers: Cross Sectional Clinical trial Answers: Cross Sectional Ecological Case-control Systematic review Meta-analysis Clinical trial Question 5 Which of the following are strengths of cross-sectional studies? Selected Answers: Relatively inexpensive No follow-up is required Answers: Relatively inexpensive No follow-up is required Causality cannot be demonstrated Experimenter uses double-blind controls Question 6 Which of the following are strengths of cohort studies? Selected Answers: Ability to track individuals over time Ability to study multiple risk factors and outcomes Answers: Ability to track individuals over time Low cost Low recall bias Ability to study multiple risk factors and outcomes