Instead of investigating the chance of going 18 months without a…

Question Answered step-by-step Instead of investigating the chance of going 18 months without a… Instead of investigating the chance of going 18 months without a root canal your practice is only interested in the chance of having a root canal given various exposures, so you decide to do case-control study. Suppose that for every root canal case from the previous 18 months, 3 controls were selected and both cases (43) and controls (129) were asked the about various exposures.  Fill in the exposure odds and ORs for all the exposures in the table below (counts in the table are for those patients who had the exposure). For each OR use the odds of having the particular exposure in cases compared to controls.  (9 pts) IN PREPexposureCases (odds)Controls  (odds)ORHave gum disease15 10  Chew sugarless gum6 20  Floss regularly10 65  Taken antibiotics in previous 6 months5 35 Overweight/obese20 38  Recent viral infection17 51  Which of these exposures appear protective and which appear harmful? (3 pts)       What doesn’t appear to have any association? (1pt)   If the controls are a random selection of anyone who did not have a filling in a molar vs. those who did, how might that impact the ORs? (2pts)       If ALL participants were patients who also had a molar filling is the OR a good estimate of the RR? Why or why not? (2 pts)      Discuss both 1 strength and 1 weakness of using a case-control here (assume they used anyone with a root canal in this practice the last 18 month as cases and any patient from this practice who did not as controls and controls are the same ages as cases) (3 pts)       Math Statistics and Probability PUBH 6003 Share QuestionEmailCopy link Comments (0)