Answered

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A study was carried out in Taiwan: a total of 128 histologically or cytologically confirmed cases of hepatocellular carcinoma and 384 controls without the disease were included in the study. Of the cases, 77% were carriers of the hepatitis B surface antigen (HbsAg) compared with only 28% of the controls (Chuang et al., 1992).
Formulate a possible hypothesis question
What type of study design?
Which parament can determine? Calculate it.
Explain the results

Sagot :

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