INTRO TO EPIDEMIOLOGICAL METHODS

1. WELCOME TO THE
PRESENTATION
EPIDEMIOLOGICAL
METHODS

2. EPIDEMIOLOGICAL
METHODS
EPIDEMIOLOGICAL STUDIES CAN
BE CLASSIFIED AS FOLLOWS.
Observational studies
Experimental studies

3. OSERVATIONAL STUDIES
 OBSERVATIONAL STUDIES CAN
EITHER BE ----
 Descriptive studies
 Analytical studies

4. PROCEDURES IN
DESCRIPTIVE STUDIES
Defining the population to be studied.
Defining the disease under study.
Describing the disease by time, person,
place.
Measurement of disease.
Comparing with known indices.
Formulation of an etiological
hypothesis

5. ANALYTICAL STUDIES
Analytical Studies could be one
of the following type.
ECOLOGICAL STUDIES.
CROSS-SECTIONAL STUDIES.
CASE-CONTROL STUDIES.
COHORT STUDIES

6. SYNONYMS
 ECOLOGICAL
 CROSS SECTIONAL
 CASE CONTROL
 COHORT
 CORRELATIONAL
 PREVALENCE
 CASE REFERENCE
 FOLLOW UP

7. ANALYTICAL STUDIES &
POPULATION
 ECOLOGICAL
 CROSS SECTIONAL
 CASE CONTROL
 COHORT
 POPULATION AS
UNIT OF STUDY
 INDIVIDUALS
 INDIVIDUALS
 INDIVIDUALS

8. EXPERIMENTAL STUDIES
THE FOLLOWING ARE THE TYPES.
Randomized Control Trials.
Field Trials.
Community Trials

9. EXPERIMENTAL STUDIES
& POLPULATION
 RANDOMIZED
CONTROL TRIALS
 FIELD TRIALS
 COMMUNITY
TRIALS
 PATIENTS AS UNIT
OF STUDY
 HEALTHY PEOPLE
AS UNIT OF STUDY
 COMMUNITY AS
UNIT OF STUDY

10. EXPERIMENTAL STUDIES
& POLPULATION
 RANDOMIZED
CONTROL TRIALS
 FIELD TRIALS
 COMMUNITY
TRIALS
 PATIENTS AS UNIT
OF STUDY
 HEALTHY PEOPLE
AS UNIT OF STUDY
 COMMUNITY AS
UNIT OF STUDY