Questions A-D: Refer to the following table showing postmenopausal hormone use and coronary heart disease with selected exposure categories. Coronary heart disease Person-years Postmenopausal hormone...

Questions A-D: Refer to the following table showing postmenopausal hormone use and coronary heart disease with selected exposure categories.

                                                                           Coronary heart disease  Person-years

Postmenopausal hormone use

               Ever use                                             30                                                        54,308.7

                              Past use                              19                                                        24,386.7

                              Current use                        11                                                        29,922.0

               Never use                                          60                                                        51,477.5

A. What is the risk of coronary heart disease among ever users of postmenopausal hormones?

B. Use the appropriate statistic to measure the strength of the association between ever versus never use. Interpret.

C. Use the appropriate statistic to measure the strength of the association between past versus never use. Interpret.

D. Use the appropriate statistic to measure the strength of the association between current versus never use. Interpret.