Flashcards
COHORT STUDY
Cards in this deck (9)
- 1COHORT STUDY- PROSPECTIVE IN NATURE
- 2/MORE GROUPS:
DIFFER IN EXPOSURE
EXPOSURE LINKED TO DISEASE - 2HOW ARE INCIDENCE RATES LINKED TO COHORT STUDIES?MEASURABLE IN EACH COHORT
- 3RELEVANCE OF NO. DISEASE CASES- MOST DISEASES = SMALL % AFFECTED
- > NO CASES = > PERSON-TIME EXPERIENCE - 4EQUATION OF INCIDENCE RATENO. PERSONS DEVELOPED DISEASE / TOTAL PERSON-TIME RISK
- 5RELATIVE RISK EQUATIONINCIDENCE RATE (EXPOSED) / INCIDENCE RATE (UNEXPOSED)
- 6ABSOLUTE RISK EQUATIONINCIDENCE RATE EXPOSED - INCIDENCE RATE UNEXPOSED
- 78 FACTORS TO CONSIDER IN COHORT STUDY1. DEFINITION OF GROUPS
2. METHOD OF FOLLOW UP
3. CHANGING EXPOSURE OVER TIME
4. DEFINITION OF DISEASE
5. DURATION OF FOLLOW-UP
6. LOSSES TO FOLLOW-UP
7. SAMPLE SIZE
8. COST - 84 ADVANTAGES OF COHORT STUDIES1. ONLY METHOD OF DIRECT MEASUREMENT OF INCIDENCE
2. FOLLOW SAME LOGIC AS CLINICAL QUESTIONS (IF EXPOSED, GET DISEASE?)
3. EXPOSURE = ELICIT W/O BIAS
4. RELATIONSHIP ASSESSED BETWEEN EXPOSURE + DISEASES - 95 DISADVANTAGES OF COHORT STUDIES1) INEFFICIENT - ENROLLED NO > DISEASED NO
2) NOT USEFUL FOR RARE CONDITIONS
3) EXPENSIVE
4) LONG TIME
5) ONLY ASSESS RELATIONSHIP BETWEEN EXPOSURE + DISEASE
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- 3rd year Medicine (STATISTICS) Flashcards on COHORT STUDY, created by supz.p1234 on 30/12/2015.
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- supz.p1234
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