- Race
- Radix
- Rahe-Holmes Social Readjustment Rating Scale
- Random
- Random Allocation
- Random-Digit Dialing
- Randomization
- Randomization, Mendelian
- Randomized Controlled Trial (RCT)
- Random Sample
- Random Sampling Variation
- Random Variable
- Random Walk
- Range of Distribution
- Rank
- Ranking Scale
- Rapid Epidemiological Assessment
- Rare-Disease Assumption
- Rate
- Rate Difference (RD)
- Rate-Odds Ratio
- Rate Ratio
- Ratio
- Ratio Scale
- Raw Data
- Reason For Encounter (RFE)
- Recall Bias
- Receiver Operating Characteristic (ROC) Curve
- Recessive
- Recommendations
- Record Linkage
- Recrudescence
- Rectangularization of Mortality
- Recurrence
- Recurrence Risk
- Recurrent Disease
- Reduction
- Reductionism
- Reed-Frost Model
- Reference Population
- Refinement
- Register, Registry
- Registration
- Regressand
- Regression
- Regression Analysis
- Regression Curve, Line, Surface, Plane
- Regression, Logistic
- Regression Model
- Regression to the Mean
- Regressor
- Reinfection
- Reinforcing Factors
- Relapse
- Relationship
- Relative Effect
- Relative Excess Risk (RER)
- Relative Index of Inequality
- Relative Odds
- Relative Poverty Level
- Relative Risk (RR)
- Relative Risk Reduction (RRR)
- Relevance
- Reliability
- Remote Sensing
- Repeatability
- Replacement-Level Fertility
- Replication
- Reporting Bias
- Representativeness
- Repression Bias
- Reproducibility
- Reproductive Isolation
- Reproductive Success
- Reprogramming
- Rescue Bias
- Research
- Research Design
- Research Ethics Board, Committee
- Research Subject
- Reservoir of Infection
- Resilience
- Residual Confounding
- Resolution, Resolving Power
- Resource Allocation
- Response Bias
- Response Rate
- Responsiveness
- Retrolective
- Retrospective Study
- Retrovirus
- Reverse Causation
- Reverse Causation Bias
- Reverse Transcription
- Review Bias
- Review, Systematic
- Ridit
- Ridit Analysis
- Risk
- Risk Assessment
- Risk Assessment Plot
- Risk-Benefit Analysis
- Risk-Benefit Ratio
- Risk Characterization
- Risk Difference (RD)
- Risk Estimation
- Risk Evaluation
- Risk Factor
- Risk Indicator
- Risk Management
- Risk Marker
- Risk Monitoring
- Risk Ratio
- Risk Set
- Robustness
- Rounding
- “Routine” Data, Routinely Collected Data
- Rubric
Randomized Controlled Trial (RCT)
- Source:
- A Dictionary of Epidemiology
- Author(s):
Miquel Porta
A clinical-epidemiological experiment in which subjects are randomly allocated into groups, usually called test and control groups, to receive or not to receive a preventive or a therapeutic procedure or intervention. The results are assessed by comparison of rates of disease, death, recovery, or other appropriate outcome in the study groups. RCTs are generally regarded as the most scientifically rigorous method of hypothesis testing available in epidemiology and medicine. Nonetheless, they may suffer lack of ... ...
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- Race
- Radix
- Rahe-Holmes Social Readjustment Rating Scale
- Random
- Random Allocation
- Random-Digit Dialing
- Randomization
- Randomization, Mendelian
- Randomized Controlled Trial (RCT)
- Random Sample
- Random Sampling Variation
- Random Variable
- Random Walk
- Range of Distribution
- Rank
- Ranking Scale
- Rapid Epidemiological Assessment
- Rare-Disease Assumption
- Rate
- Rate Difference (RD)
- Rate-Odds Ratio
- Rate Ratio
- Ratio
- Ratio Scale
- Raw Data
- Reason For Encounter (RFE)
- Recall Bias
- Receiver Operating Characteristic (ROC) Curve
- Recessive
- Recommendations
- Record Linkage
- Recrudescence
- Rectangularization of Mortality
- Recurrence
- Recurrence Risk
- Recurrent Disease
- Reduction
- Reductionism
- Reed-Frost Model
- Reference Population
- Refinement
- Register, Registry
- Registration
- Regressand
- Regression
- Regression Analysis
- Regression Curve, Line, Surface, Plane
- Regression, Logistic
- Regression Model
- Regression to the Mean
- Regressor
- Reinfection
- Reinforcing Factors
- Relapse
- Relationship
- Relative Effect
- Relative Excess Risk (RER)
- Relative Index of Inequality
- Relative Odds
- Relative Poverty Level
- Relative Risk (RR)
- Relative Risk Reduction (RRR)
- Relevance
- Reliability
- Remote Sensing
- Repeatability
- Replacement-Level Fertility
- Replication
- Reporting Bias
- Representativeness
- Repression Bias
- Reproducibility
- Reproductive Isolation
- Reproductive Success
- Reprogramming
- Rescue Bias
- Research
- Research Design
- Research Ethics Board, Committee
- Research Subject
- Reservoir of Infection
- Resilience
- Residual Confounding
- Resolution, Resolving Power
- Resource Allocation
- Response Bias
- Response Rate
- Responsiveness
- Retrolective
- Retrospective Study
- Retrovirus
- Reverse Causation
- Reverse Causation Bias
- Reverse Transcription
- Review Bias
- Review, Systematic
- Ridit
- Ridit Analysis
- Risk
- Risk Assessment
- Risk Assessment Plot
- Risk-Benefit Analysis
- Risk-Benefit Ratio
- Risk Characterization
- Risk Difference (RD)
- Risk Estimation
- Risk Evaluation
- Risk Factor
- Risk Indicator
- Risk Management
- Risk Marker
- Risk Monitoring
- Risk Ratio
- Risk Set
- Robustness
- Rounding
- “Routine” Data, Routinely Collected Data
- Rubric