In a prospective cohort study three hundred thirty-seven patients had HCV RNA (chronic infection), 91 had HCV antibodies and no HCV RNA (cleared infection), and 1957 had no HCV markers. Median CD4(+)T-cell counts/µL were 200(chronic), 193(cleared) and 175(no markers). There were 558 deaths. At a median follow-up of 6.1 years, patients without HCV markers had a 50% decreased risk of mortality compared with patients with chronic HCV. What would be the value associated with the measure of effect interpreted from the narrative?

  • RR=1.5
  • RR=0.5
  • OR=1.5
  • OR=0.5

closed as off-topic by whuber Jun 12 at 17:07

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