In a hypothetical population based case-control study examining the association between indoor air pollution and chronic bronchitis researchers recruited 520 chronic bronchitis cases and 4480 controls and collected data on potential factors related to chronic bronchitis. The table below includes data on chronic bronchitis and indoor air pollution. Where appropriate use 'no (-) exposure as the reference category. Disease (+) No Disease (-) Indoor pollution (+) 320 2600 Indoor pollution (-) 200 1880 total 520 4480 Calculate the appropriate crude measure of association. A) Disease Odds Ratio = 1.06 B) Rate Ratio = 2.25 C) Exposure Odds Ratio = 1.16 D) Risk Ratio = 1.14. Calculate the 95% confidence interval for the measure of association. A) (0.990, 1.277) B) (1.867, 2.711) C) (0.946, 1.374) D) (0.963, 1.398)