Part 2: For each of the following scenarios answer the questions about bias that follow. Use complete sentences 1. Smoking and Chronic bronchitis A study to assess the association of chronic bronchitis and smoking compared a group of hospitalized individuals with chronic bronchitis (cases) with a group of volunteer individuals without chronic bronchitis (controls) who were full-time employees of the same hospital where the cases were identified. The results from this study reported, for the first time in the literature, a strong association between chronic bronchitis and smoking. A. What type of bias may be present? Why do you suspect the presence of the bias you have identified?

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### Part 2: For each of the following scenarios, answer the questions about bias that follow. Use complete sentences.

#### 1. Smoking and Chronic Bronchitis

A study to assess the association of chronic bronchitis and smoking compared a group of hospitalized individuals with chronic bronchitis (cases) with a group of volunteer individuals without chronic bronchitis (controls) who were full-time employees of the same hospital where the cases were identified. The results from this study reported, for the first time in the literature, a strong association between chronic bronchitis and smoking.

A. **What type of bias may be present? Why do you suspect the presence of the bias you have identified?**

B. **The magnitude of this association is likely to be either over- or underestimated. Which do you think is the case, and what makes you think so?**
Transcribed Image Text:### Part 2: For each of the following scenarios, answer the questions about bias that follow. Use complete sentences. #### 1. Smoking and Chronic Bronchitis A study to assess the association of chronic bronchitis and smoking compared a group of hospitalized individuals with chronic bronchitis (cases) with a group of volunteer individuals without chronic bronchitis (controls) who were full-time employees of the same hospital where the cases were identified. The results from this study reported, for the first time in the literature, a strong association between chronic bronchitis and smoking. A. **What type of bias may be present? Why do you suspect the presence of the bias you have identified?** B. **The magnitude of this association is likely to be either over- or underestimated. Which do you think is the case, and what makes you think so?**
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