Question: Compute the odds ratio and confidence interval for the data shown in Table 18-18, from a case-control study of oral contraceptive use and breast cancer.

Compute the odds ratio and confidence interval for the data shown in Table 18-18, from a case-control study of oral contraceptive use and breast cancer. Does the data show a significant relationship between the two?

Table 18-18. Contingency table for oral contraceptive use and breast cancer D+

Table 18-18. Contingency table for oral contraceptive use and breast cancer D+ D- E+ 30 70 E- 20 80

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