Risk Ratio  a. Table 1 b. Table 2 2. Odds Ratio a. Table 1 b. Table 2 3. Answer the following using the information calculated above: a. Discuss how the Risk Ratio compare to the odds

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1. Risk Ratio 

a. Table 1

b. Table 2

2. Odds Ratio

a. Table 1

b. Table 2

3. Answer the following using the information calculated above:

a. Discuss how the Risk Ratio compare to the odds ratio for table 1.

b. Discuss how the risk ratio compare to the odds ratio for table 2.

c. Describe the reasons for the differences/simi

**Part 4: Relationship between Risk Ratio and Odds Ratios**

Use the data in Tables 1 and 2 to calculate the risk and odds ratios.

**Table 1: Helicobacter pylori infection and development of stomach cancer as a rare disease in a Hypothetical Population of 10,000 Persons**

|                 | Disease  |             |              |
|-----------------|----------|-------------|--------------|
|                 | Stomach Cancer | No Stomach Cancer | Total        |
| Exposed (H. pylori infection)  | a = 25    | b = 1,975   | 2,000 |
| Not Exposed (No H. pylori infection) | c = 5  | d = 7,995  | 8,000 |
| Total          | 30       | 9,970       | 10,000        |

**Table 2: Helicobacter pylori infection and development of stomach cancer as a common disease in a Hypothetical Population of 10,000 Persons**

|                 | Disease  |             |              |
|-----------------|----------|-------------|--------------|
|                 | Stomach Cancer | No Stomach Cancer | Total        |
| Exposed (H. pylori infection)  | a = 1,000 | b = 1,000   | 2,000 |
| Not Exposed (No H. pylori infection) | c = 200 | d = 7,800  | 8,000 |
| Total          | 1,200    | 8,800       | 10,000        |

1. **Risk Ratio**:

   - **Table 1:**
     - Risk in Exposed = a / (a + b) = 25 / 2,000
     - Risk in Not Exposed = c / (c + d) = 5 / 8,000

   - **Table 2:**
     - Risk in Exposed = a / (a + b) = 1,000 / 2,000
     - Risk in Not Exposed = c / (c + d) = 200 / 8,000

These tables illustrate the relationship between Helicobacter pylori infection and the development of stomach cancer, considering both rare and common disease scenarios in a hypothetical population of 10,000 persons.
Transcribed Image Text:**Part 4: Relationship between Risk Ratio and Odds Ratios** Use the data in Tables 1 and 2 to calculate the risk and odds ratios. **Table 1: Helicobacter pylori infection and development of stomach cancer as a rare disease in a Hypothetical Population of 10,000 Persons** | | Disease | | | |-----------------|----------|-------------|--------------| | | Stomach Cancer | No Stomach Cancer | Total | | Exposed (H. pylori infection) | a = 25 | b = 1,975 | 2,000 | | Not Exposed (No H. pylori infection) | c = 5 | d = 7,995 | 8,000 | | Total | 30 | 9,970 | 10,000 | **Table 2: Helicobacter pylori infection and development of stomach cancer as a common disease in a Hypothetical Population of 10,000 Persons** | | Disease | | | |-----------------|----------|-------------|--------------| | | Stomach Cancer | No Stomach Cancer | Total | | Exposed (H. pylori infection) | a = 1,000 | b = 1,000 | 2,000 | | Not Exposed (No H. pylori infection) | c = 200 | d = 7,800 | 8,000 | | Total | 1,200 | 8,800 | 10,000 | 1. **Risk Ratio**: - **Table 1:** - Risk in Exposed = a / (a + b) = 25 / 2,000 - Risk in Not Exposed = c / (c + d) = 5 / 8,000 - **Table 2:** - Risk in Exposed = a / (a + b) = 1,000 / 2,000 - Risk in Not Exposed = c / (c + d) = 200 / 8,000 These tables illustrate the relationship between Helicobacter pylori infection and the development of stomach cancer, considering both rare and common disease scenarios in a hypothetical population of 10,000 persons.
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