Unit 1619: Comprehensive Epidemiology

1. Introduction to Epidemiology

• Definition and scope of epidemiology
• Key terms: incidence, prevalence, morbidity, mortality
• Importance of epidemiology in public health practice
• Historical perspectives and landmark epidemiological studies

2. Study Designs in Epidemiology

2.1 Cross-Sectional Studies

• Definition and purpose
• Data collection methods
• Advantages and limitations

2.2 Case-Control Studies

• Design and selection of cases and controls
• Retrospective nature and recall bias
• Strengths and weaknesses

2.3 Cohort Studies

• Prospective and retrospective cohorts
• Exposure assessment and follow-up
• Strengths, limitations, and applications

2.4 Randomized Controlled Trials (RCTs)

• Design principles and randomization
• Blinding and control groups
• Ethical considerations
• Strengths and limitations

3. Measures of Disease Frequency

• Incidence rate: definition, formula, interpretation
• Prevalence rate: point and period prevalence
• Mortality rate: crude, specific, and case fatality rates
• Calculations and examples

4. Surveillance and Outbreak Investigation

4.1 Public Health Surveillance Systems

• Types: passive, active, sentinel, and syndromic surveillance
• Data sources and reporting mechanisms

4.2 Outbreak Investigation Process

• Steps: preparation, case definition, case finding, data collection
• Hypothesis generation and testing
• Implementing control and prevention measures
• Role of epidemiologists in outbreak response

5. Descriptive Epidemiology

• Principles and objectives
• Characterizing disease distribution by person, place, and time
• Use of epidemic curves, spot maps, and descriptive statistics
• Identifying patterns and public health priorities

6. Analytical Epidemiology

• Purpose and approach
• Comparing disease rates between groups
• Measures of association: relative risk, odds ratio
• Confounding and bias considerations
• Causal inference frameworks

7. Infectious Disease Epidemiology

• Modes of transmission: direct, indirect, vector-borne
• Epidemic dynamics and models
• Herd immunity and vaccination strategies
• Disease surveillance and control measures

8. Chronic Disease Epidemiology

• Overview of major chronic diseases: heart disease, cancer, diabetes
• Risk factors: genetic, behavioral, environmental
• Impact on population health and healthcare systems
• Prevention and control strategies

9. Environmental Epidemiology

• Environmental exposures and health outcomes
• Assessment methods for environmental risk factors
• Study designs specific to environmental epidemiology
• Role in environmental health policy and regulation

10. Social Epidemiology

• Social determinants of health: socioeconomic status, race, gender
• Health disparities and inequities
• Methods to study social factors in epidemiology
• Implications for public health interventions and policy