In a case‐control study of the association between residence near a coal factory and lung cancer,...
In a case‐control study of the association between residence near a coal factory and lung cancer, selection bias is likely to arise because:
a) People without lung cancer living near a coal factory may be more likely to participate than people living further away
b) People with lung cancer living near a coal factory may be more likely to participate than people living further away.
c) People with lung cancer may be more likely to participate than controls recruited from the general population
d) All of the above
Homework Answers
Ans : b) People with lung cancer living near a coal factory may be more likely to participate than people living further away.
Note here for collection of data, one has to collect the "cases" data from the community living near the coal factory, and since in this region, more people are lung cancer patients compared to the people in general population, this will introduce selection bias. Here the exposure ( living near coal factory ) affects the selection. Hence selection bias is caused.
Add Answer to:
In a case‐control study of the association between residence
near a coal factory and lung cancer,...
A case-control study of lung cancer was conducted which compared the smoking habits of patients with...
A case-control study of lung cancer was conducted which compared the smoking habits of patients with lung cancer to the smoking habits of other patients attending the same respiratory clinic. The study found no association between smoking and lung cancer. What is the most likely study error that explains this scenario? Select one: Differential misclassification bias. Random measurement variability. Non-differential misclassification bias. Random sampling error. Selection bias.
A case-control study was conducted to examine the association between a high fat diet and coronary...
A case-control study was conducted to examine the association between a high fat diet and coronary artery disease. Subjects with physician diagnosed heart disease and controls without heart disease are recruited and asked to complete questionnaires about their dietary habits in order to categorize them as having diets with high fat content or not. This situation is more likely to generate which type of bias: a. non-differential misclassification b. differential misclassification c. selection bias d. none of the above
Lung Cancer & Smoking Case Study A causal relationship between cigarette smoking and lung cancer was first suspected...
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 Austin Bradford Hill in Great Britain. The first was a case-control study begun in 1947 comparing the smoking habits of lung cancer patients with the smoking habits of other patients. The...
Suppose a case-control study asked 238 lung cancer patients and 428 controls (matched to the cases...
Suppose a case-control study asked 238 lung cancer patients and 428 controls (matched to the cases by age and sex) whether they had kept a pet bird during adulthood. Of the 238 lung cancer cases, 99 said yes. Of the 428 controls, 102 said yes. (a) Construct a contingency table for the data. Lung Cancer No Lung Cancer Total Bird No Bird Total (b) Compute the risk (as a %) of lung cancer for bird and non-bird owners for this...
Case-Control Study: Of 1200 workers in an asbestos factory, 55 people developed lung cancer. In a...
Case-Control Study: Of 1200 workers in an asbestos factory, 55 people developed lung cancer. In a nearby factory of 4500 workers, 60 developed lung cancer. Consider asbestos as a cause of lung cancer. 1) Draw a 2x2 table & fill out the cells and label 2) Calculate prevalence of lung cancer among exposed 3) Calculate prevalence of lung cancer among non-exposed 4) Calculate prevalence of exposure among diseased 5) Calculate prevalence of exposure among non-diseased. 6) Calculate & interpret OR
Lung Cancer & Smoking Case Study A causal relationship between cigarette smoking and lung cancer was...
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 Austin Bradford Hill in Great Britain The first was a case-control study begun in 1947 over a 4-year period (April 1948-February 1952). Initially, 20 hospitals, and later more, were asked to...
A study examined the association between lung cancer and working in an asbestos plant. Although the...
A study examined the association between lung cancer and working in an asbestos plant. Although the asbestos plant closed 10 years ago, researchers pulled past employment records to confirm employment. They divided the company employees into two groups: those directly exposed on the production line and those who worked in other areas of the plant, not directly working with asbestos. The researchers then looked at medical records to see if the exposed and unexposed groups were currently diagnosed with lung...
QUESTION 14 You are required to fill in all the missing values. A hypothetical study investigates the incidence of lung cancer in people who use e-cigarettes only. 1,308 cases and controls are re...
QUESTION 14 You are required to fill in all the missing values. A hypothetical study investigates the incidence of lung cancer in people who use e-cigarettes only. 1,308 cases and controls are recruited for the study. 231 of the people with lung cancer smoke e-cigarettes. 544 of the people without lung cancer do not smoke e-cigarettes. A total of 754 people in this study have smoked e-cigarettes. Fill in the blanks in the table and then the blanks that follow....
Lung Cancer & Smoking Case Study A causal relationship between cigarette smoking and lung cancer was...
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 Austin Bradford Hill in Great Britain The first was a case-control study begun in 1947 comparing the smoking habits of lung cancer patients with the smoking habits of other patients. The...
Researchers are planning to conduct a case-control study of the association between an occupational exposure and...
Researchers are planning to conduct a case-control study of the association between an occupational exposure and a health outcome. The researchers plan to study exposed workers from one factory and compare them with unexposed retirees who have never worked in a factory. A reviewer of the research proposal is worried about selection bias and in particular about the possibility of the healthy worker effect. Which of the following best represents the reviewer's concern? a. Retirees should not be compared to...
Suppose a case-control study asked 238 lung cancer patients and 428 controls (matched to the cases by age and sex) whether they had kept a pet bird during adulthood. Of the 238 lung cancer cases, 99 said yes. Of the 428 controls, 102 said yes. (a) Construct a contingency table for the data. Lung Cancer No Lung Cancer Total Bird No Bird Total (b) Compute the risk (as a %) of lung cancer for bird and non-bird owners for this...
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 Austin Bradford Hill in Great Britain The first was a case-control study begun in 1947 over a 4-year period (April 1948-February 1952). Initially, 20 hospitals, and later more, were asked to...
QUESTION 14 You are required to fill in all the missing values. A hypothetical study investigates the incidence of lung cancer in people who use e-cigarettes only. 1,308 cases and controls are recruited for the study. 231 of the people with lung cancer smoke e-cigarettes. 544 of the people without lung cancer do not smoke e-cigarettes. A total of 754 people in this study have smoked e-cigarettes. Fill in the blanks in the table and then the blanks that follow....
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 Austin Bradford Hill in Great Britain The first was a case-control study begun in 1947 comparing the smoking habits of lung cancer patients with the smoking habits of other patients. The...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago