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29 Jun 2018

Why has oral health historically been considered separate from overall health?

What are the implications of this distinction ?. Has it impacted the development of the field or access to oral health care?

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Reid Wolff
Reid WolffLv2
1 Jul 2018

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  1. Draw a 2 x 2 table demonstrating the relationship betweenchewing tobacco and oral leukoplakia. In drawing this table, putthe exposure variable on the columns and the health outcomevariable on the rows.
  2. Draw a second 2 x 2 table demonstrating the relationshipbetween chewing tobacco and oral leukoplakia, but this time, putthe exposure variable on the rows and the health outcome variableon the columns.
  3. Using the table drawn in part a, compute the prevalence ratioand the prevalence odds ratio of oral leukoplakia for chewerscompared to non-chewers. Are these two estimates close toone-another? Why are these prevalence measures and not incidencemeasures?
  4. Using the table drawn in part b, compute the prevalence ratioand the prevalence odds ratio of oral leukoplakia for chewerscompared to non-chewers. Are these estimates equal to theircorresponding estimates computed using the table drawn in part a?Explain.
  5. Ignoring the issue of statistical inference and the control ofother variables, what do these results say about the relationshipbetween chewing tobacco and the presence of oral leukoplakia?
  6. Calculate the case-fatality rate (actually, a risk) in thisstudy. Why is this a measure of risk?
  7. Based on the information provided, why can’t you evaluatewhether tobacco chewers have a higher case-fatality risk thannon-chewers?

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