The following table shows the relationship between cigarette smoking and lung cancer among male cases and...
The following table shows the relationship between cigarette smoking and lung cancer among male cases and controls.
|
Cases |
Controls |
|
|
Cigarette smoker |
1,350 |
1,296 |
|
Non-Smoker |
7 |
61 |
|
Total |
1,357 |
1,357 |
Table 1. Smoking status before onset of the present illness, lung cancer cases and matched controls with other diseases, Great Britain, 1948-1952.
Question 11 (2 points) Calculate the odds of smoking among the cases?
Homework Answers
According to the given data
Total Cigarette smoker cases are 1350
Total non smoker cases are 7
Total cases are 1357
Among the cases total odd cases =?
Odds ratio = probability/ (1-probability) = proportion /(1-proportion)
Therefore (1,350/1,357) / (7/1,357) = 1,350/7 = 192.9:1
Patients in case group is 193 times that would probably smoke
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The following table shows the relationship between cigarette
smoking and lung cancer among male cases and...
Table 1. Smoking status before onset of the present illness, lung cancer cases and matched controls with other diseases,...
Table 1. Smoking status before onset of the present illness, lung cancer cases and matched controls with other diseases, Great Britain, 1948-1952. Cases Controls Cigarette smoker 1,350 1,296 Non-Smoker 7 61 Total 1,357 1,357 Question 11 (2 points) Calculate the odds of smoking among the cases.
Over 1,700 patients with lung cancer, all under age 75, were eligible for the case-control study....
Over 1,700 patients with lung cancer, all under age 75, were eligible for the case-control study. About 15% of these persons were not interviewed because of death, discharge, severity of illness, or inability to speak English. An additional group of patients were interviewed but later excluded when initial lung cancer diagnosis proved mistaken. The final study group included 1,465 cases (1,357 males and 108 females). The following table shows the relationship between cigarette smoking and lung cancer among male cases...
Over 1,700 patients with lung cancer, all under age 75, were eligible for the case-control study. About 15% of these per...
Over 1,700 patients with lung cancer, all under age 75, were eligible for the case-control study. About 15% of these persons were not interviewed because of death, discharge, severity of illness, or inability to speak English. An additional group of patients were interviewed but later excluded when initial lung cancer diagnosis proved mistaken. The final study group included 1,465 cases (1,357 males and 108 females). The following table shows the relationship between cigarette smoking and lung cancer among male cases...
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Table 2 shows the frequency distribution of male cases and controls by average number of cigarettes...
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QUESTION 15: WHAT DO THESE RESULTS TELL YOU? QUESTION 16: WHAT ARE THE OTHER POSSIBLE EXPLANATIONS...
QUESTION 15: WHAT DO
THESE RESULTS TELL YOU?
QUESTION 16: WHAT ARE THE OTHER POSSIBLE EXPLANATIONS
FOR THE APPARENT ASSOCIATION? INCLUDE AND EXPLAIN 3 SPECIFIC BIAS
THAT PERTAIN TO THIS STUDY.
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Researchers have long been interested in the relationship between cigarette smoking and lung cancer. Suppose that...
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The following is a data table of lung cancer cases according to smoking habits Smoking Lung cancer Other causes Total 712 299 1011 Please fill in the following (round to the nearest hundredth) using the table above: 397 61 458 315 238 553 Yes No Total · Among smokers, p , odds odds- Among non-smokers, p- » Odds ratio (smokers versus non-smokers)-
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QUESTION 15: WHAT DO
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QUESTION 16: WHAT ARE THE OTHER POSSIBLE EXPLANATIONS
FOR THE APPARENT ASSOCIATION? INCLUDE AND EXPLAIN 3 SPECIFIC BIAS
THAT PERTAIN TO THIS STUDY.
Lung Cancer & Smoking Case Study A causal relationship between cigarette smoking and lung cancer was first suspected in the 1920s on the basis of clinical observations. To test this apparent association, numerous epidemiologic studies were undertaken between 1930 and 1960. Two studies were conducted by Richard Doll and...
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