Case study method advantages and disadvantages
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Advantages:
They are efficient for rare diseases or diseases with a long latency period between exposure and disease manifestation.
They are less costly and less time-consuming; they are advantageous when exposure data is expensive or hard to obtain.
They are advantageous when studying dynamic populations in which follow-up is difficult.
Disadvantages:
They are subject to selection bias.
They are inefficient for rare exposures.
Information on exposure is subject to observation bias.
They generally do not allow calculation of incidence (absolute risk)
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