Description:

Math equation. The 95% confidence limits for an odds ratio are the constant "e" raised to the power of the natural log of the odds ratio plus or minus 1.96 times the square root of the sum of 1 over "a" plus 1 over "b" plus 1 over "c" plus 1 over "d" where "a", "b", "c", and "d" represent the number of exposed cases, exposed control, unexposed cases, and unexposed controls respectively.