Suppose that 350 cervical cancer cases were identified and a random sample of women of the same age range who were admitted to the hospital included 500 eligible controls. After independent blood tests of all cases and controls, 90% of cases were positive for HPV antibodies while 63% of controls were positive for antibodies to the virus. What is the appropriate measure of association and its value? choose answer:

a)The ratio of the odds of exposure among cases and controls equal to 5.3

b)The ratio of HPV-exposed percentages equal to 1.4

c)The number of exposed cases divided by the number of exposed controls equal to 1.0

d)The number of nonexposed cases divided by the number of nonexposed controls equal to 0.2

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