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Odds Ratio (Estimated Relative Risk) 1. In a fictitious case-control study of male farm workers, 15 cases of low fertil- ity were selected and compared to 285 male farm workers in the same fields with normal fertility (control subjects). Researchers noted whether the workers handled pesticides or not. They found that 10 of the cases had handled pesti- cides, and only 90 of the controls had handled pesticides. Calculate the odds ratio (estimated relative risk) of low fertility associated with handling pesticides. a. First fill in the 2x2 table Handled pesticides? Yes No b. Now calculate the odds ratio. Cases )/(____ = Controls

Odds Ratio (Estimated Relative Risk) 1. In a fictitious case-control study of male farm workers, 15 cases of low fertil- ity were selected and compared to 285 male farm workers in the same fields with normal fertility (control subjects). Researchers noted whether the workers handled pesticides or not. They found that 10 of the cases had handled pesti- cides, and only 90 of the controls had handled pesticides. Calculate the odds ratio (estimated relative risk) of low fertility associated with handling pesticides. a. First fill in the 2x2 table Handled pesticides? Yes No b. Now calculate the odds ratio. Cases )/(____ = Controls

Phlebotomy Essentials
Phlebotomy Essentials
6th Edition
ISBN:9781451194524
Author:Ruth McCall, Cathee M. Tankersley MT(ASCP)
Publisher:Ruth McCall, Cathee M. Tankersley MT(ASCP)
Chapter1: Phlebotomy: Past And Present And The Healthcare Setting
Section: Chapter Questions
Problem 1SRQ
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**Odds Ratio (Estimated Relative Risk)** 1. In a fictitious case-control study of male farm workers, 15 cases of low fertility were selected and compared to 285 male farm workers in the same fields with normal fertility (control subjects). Researchers noted whether the workers handled pesticides or not. They found that 10 of the cases had handled pesticides, and only 90 of the controls had handled pesticides. Calculate the odds ratio (estimated relative risk) of low fertility associated with handling pesticides. a. First fill in the 2x2 table: \[ \begin{array}{|c|c|c|} \hline \text{Handled pesticides?} & \text{Cases} & \text{Controls} \\ \hline \text{Yes} & \quad & \quad \\ \hline \text{No} & \quad & \quad \\ \hline \end{array} \] b. Now calculate the odds ratio. \[ (\_\_\_\_ \times \_\_\_\_) / (\_\_\_\_ \times \_\_\_\_) = \_\_\_\_ \] 2. Fifty residents of a small town were identified with E. coli infections. An investigation of 25 of these patients and 40 well residents of the same town revealed that many of the patients had eaten spinach from the local market in the week before the onset of illness. Of the control subjects, fewer had eaten spinach in the same time period. Calculate the odds ratio (estimated relative risk) of E. coli infection associated with eating spinach.
Transcribed Image Text:**Odds Ratio (Estimated Relative Risk)** 1. In a fictitious case-control study of male farm workers, 15 cases of low fertility were selected and compared to 285 male farm workers in the same fields with normal fertility (control subjects). Researchers noted whether the workers handled pesticides or not. They found that 10 of the cases had handled pesticides, and only 90 of the controls had handled pesticides. Calculate the odds ratio (estimated relative risk) of low fertility associated with handling pesticides. a. First fill in the 2x2 table: \[ \begin{array}{|c|c|c|} \hline \text{Handled pesticides?} & \text{Cases} & \text{Controls} \\ \hline \text{Yes} & \quad & \quad \\ \hline \text{No} & \quad & \quad \\ \hline \end{array} \] b. Now calculate the odds ratio. \[ (\_\_\_\_ \times \_\_\_\_) / (\_\_\_\_ \times \_\_\_\_) = \_\_\_\_ \] 2. Fifty residents of a small town were identified with E. coli infections. An investigation of 25 of these patients and 40 well residents of the same town revealed that many of the patients had eaten spinach from the local market in the week before the onset of illness. Of the control subjects, fewer had eaten spinach in the same time period. Calculate the odds ratio (estimated relative risk) of E. coli infection associated with eating spinach.
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