The Long Island Breast Cancer Study tested the hypothesis that environmental pol

Question

The Long Island Breast Cancer Study tested the hypothesis that environmental pollution was causing the relatively high rates of breast cancer among residents of Suffolk and Nassau counties of New York. Epidemiologists identified a group of 1,420 women who were diagnosed with breast cancer between 1984 and 1986 and compared their residential histories over a 20 year period with those of a matched group of healthy women. What kind of epidemiological study was this?

Random control trial

Case-control

Cohort

Retrospective

Random control trial

Case-control

Cohort

Retrospective

Explanation / Answer

This is a case- control study. This refers to observation of comparison of two groups ( the affected women and the healthy women ) in order to identity the factors ( environment pollution). attributing to a medical condition ( breast cancer)

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