I calculated the following risk ratios by hand with the 18 - 29 group being the reference group and I have the following questions:

- Is it possible to calculate confidence intervals for multiple exposure groups? If so what would that process be?

- Would I input the table below in order to calculate the confidence intervals in a statistical program, or would the risk ratios and confidence intervals have to be calculated in using the raw data? Is is possible to calculate by hand (or is there a calculator)?