Types of Clinical Studies and Evidence
Levels Exam Questions and Answers
100% Pass
Hazard Ratio (HR) - ANSWER-Ratio of hazard rates between treatment and
control.
Clinical Study - ANSWER-Research evaluating diagnosis, treatment, or screening.
Randomized Controlled Trial (RCT) - ANSWER-Gold standard study design with
random assignment.
Observational Study - ANSWER-Study observing subjects without intervention.
Case-Control Study - ANSWER-Compares subjects with and without a condition.
Cohort Study - ANSWER-Follows a group over time to assess outcomes.
Cross-Sectional Study - ANSWER-Assesses risk factors and outcomes at one time.
Meta-Analysis - ANSWER-Combines results from multiple studies for synthesis.
Systematic Review - ANSWER-Comprehensive review of literature on a topic.
©️COPYRIGHT 2025, ALL RIGHTS RESERVED. 1
Levels Exam Questions and Answers
100% Pass
Hazard Ratio (HR) - ANSWER-Ratio of hazard rates between treatment and
control.
Clinical Study - ANSWER-Research evaluating diagnosis, treatment, or screening.
Randomized Controlled Trial (RCT) - ANSWER-Gold standard study design with
random assignment.
Observational Study - ANSWER-Study observing subjects without intervention.
Case-Control Study - ANSWER-Compares subjects with and without a condition.
Cohort Study - ANSWER-Follows a group over time to assess outcomes.
Cross-Sectional Study - ANSWER-Assesses risk factors and outcomes at one time.
Meta-Analysis - ANSWER-Combines results from multiple studies for synthesis.
Systematic Review - ANSWER-Comprehensive review of literature on a topic.
©️COPYRIGHT 2025, ALL RIGHTS RESERVED. 1