A case-control study of the relationship between asthma and a history of pertussis vaccination among children...
A case-control study of the relationship between asthma and a history of pertussis vaccination among children (2-3 years old) was conducted in one community. Although overall participation was good, not all parents of cases and controls could be interviewed. A difference in the proportion interviewed based on case/control status (asthma/no asthma) and based on day care enrollment was identified by the investigators. Only 63% of control parents with a child enrolled in day care could be interviewed, versus 82% of control parents with a child who was not enrolled in day care. In comparison, 93% of case parents were interviewed, a percentage that was the same for parents of children who were and were not enrolled in day care. In this study, how could “enrollment in day care” confound the association between asthma and pertussis vaccination?
Homework Answers
This could confound the result by giving variation or difference in the actual results when compared with enrolled and nonenrolled parents an children.Bias can occur due to this type of research study I'm the result.The exact relationship between asthma and the vaccination history can be got. Moreover missing certain subjects during the interview can give an error in the research study.
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A case-control study of the relationship between asthma and a
history of pertussis vaccination among children...
A case-control study examined the association between maternal smoking during pregnancy and ADHD among children. The...
A case-control study examined the association between maternal smoking during pregnancy and ADHD among children. The investigators decided to match the cases and controls by the mother’s level of education. What is the effect of matching in this study? Choose the best answer.
In this hospital-based case-control study exploring the relationship between acute myocardial infarction and coffee consumption, the...
In this hospital-based case-control study exploring the relationship between acute myocardial infarction and coffee consumption, the study investigators enrolled 150 people with MI and 150 healthy controls. The investigators used a structured questionaire to ask participatants about their coffee drinking habits over the past 5 years. Using the following table, what is the OR? Round to 2 decimals. Disease Total Exposure 150 Coffee 90 60 |60 |90 |No coffee |150 150150 Total 300
2. In another vaccination study, the incidence of chicken pox among non-vaccinated children, younger than 12,...
2. In another vaccination study, the incidence of chicken pox among non-vaccinated children, younger than 12, was found to be 200/1,000 and the incidence among the vaccinated was 101,000. From another source we know that 30% of the total population (under 12 years of age) was not vaccinated, calculate the following for the given data: (a) The incidence of chicken pox attributable to non-vaccination of the total (under 12) (2 pts) (b) The proportion of the risk of chicken pox...
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...
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...
Public Health Epidemiology A case control study of household tobacco smoke and sudden infant death syndrome...
Public Health Epidemiology A case control study of household tobacco smoke and sudden infant death syndrome (SIDS) in the state of IL found an OR=1.7, such the odds of SIDS among children in houses in which at least one household member smoked in the house was 1.7 times that of children who were not exposed to household tobacco smoke. The SIDS cases came from a state registry of all SIDS deaths. The controls were selected by identifying a child born...
EPIDEMIOLOGY QUESTION Investigators conducted a study to compare measles-mumps-rubella (MMR) vaccine history among 1,200 children with...
EPIDEMIOLOGY QUESTION Investigators conducted a study to compare measles-mumps-rubella (MMR) vaccine history among 1,200 children with developmental disorder and 4,400 children without such disorders. (They found no association.) This is an example of which type of study? A. Case-control B. Cohort C. Cross-Sectional D. Clinical trial
To study the causes of an outbreak of aflatoxin poisoning in Africa, investigators conducted a case-control study with 4...
To study the causes of an outbreak of aflatoxin poisoning in Africa, investigators conducted a case-control study with 40 case-patients and 80 controls. Among the 40 poisoning victims, 32 reported storing their maize inside rather than outside. Among the 80 controls, 20 stored their maize inside. a. Set up a 2 x 2 table and calculate the odds ratio for the association between inside storage of maize and illness. b. Interpret the odds ratio.
A case control study was conducted in Alabama to find out whether exposure to antibiotic during...
A case control study was conducted in Alabama to find out whether exposure to antibiotic during pregnancy resulted in risk of child developing eosinophilic esophagitis. Investigators selected 300 cases of women who has child with eosinophilic esophagitis and 600 controls. The study found that 110 case mothers and 60 control mothers reported using antibiotics during pregnancy. Set up a two-by-two table for this data Calculate the odds ratio. State in words your interpretation of this odds ratio.
Question 28 0 out of 2 po n a case-control study of osteoporosis, 150 women were...
Question 28 0 out of 2 po n a case-control study of osteoporosis, 150 women were enrolled as cases and an equal number as controls. Among the cases 50 reported low calcium intake, while only 20 of the controls reported low calcium intake. Calculate the odds ratio in the association between low calcium intake and developing osteoporosis in this population.
In this hospital-based case-control study exploring the relationship between acute myocardial infarction and coffee consumption, the study investigators enrolled 150 people with MI and 150 healthy controls. The investigators used a structured questionaire to ask participatants about their coffee drinking habits over the past 5 years. Using the following table, what is the OR? Round to 2 decimals. Disease Total Exposure 150 Coffee 90 60 |60 |90 |No coffee |150 150150 Total 300
2. In another vaccination study, the incidence of chicken pox among non-vaccinated children, younger than 12, was found to be 200/1,000 and the incidence among the vaccinated was 101,000. From another source we know that 30% of the total population (under 12 years of age) was not vaccinated, calculate the following for the given data: (a) The incidence of chicken pox attributable to non-vaccination of the total (under 12) (2 pts) (b) The proportion of the risk of chicken pox...
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 28 0 out of 2 po n a case-control study of osteoporosis, 150 women were enrolled as cases and an equal number as controls. Among the cases 50 reported low calcium intake, while only 20 of the controls reported low calcium intake. Calculate the odds ratio in the association between low calcium intake and developing osteoporosis in this population.
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