In a case control study whether prolonged air travel is a risk factor for venous thromboembolism,...
Homework Answers
Answer :
Case control study:
Case,control and exposure:
Formula and steps:
Crude odds ratio =ad/bc.
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In a case control study whether prolonged air travel is a risk factor for venous thromboembolism,...
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 3: A case control study was conducted in Alabama to find out whether exposure to...
Question 3: 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. a. Set up a two-by-two table for this data. (2pts) b. Calculate the odds ratio. (3pts) C. State in words your interpretation...
Read the following research study and answer the following questions: A case control study was conducted...
Read the following research study and answer the following questions: A case control study was conducted to evaluate the relationship between direct sun exposure and skin cancer. 150 Cases and 100 controls were recruited from Al Wehda hospital. A data collecting method was distributed among both controls and cases. Analysis of data revealed that 70 of cases were exposed to active smoking while only 40 of controls were exposed. Construct a 2 by 2 table to demonstrate the two dichotomous...
Read the following research study and answer the following questions: A case control study was conducted...
Read the following research study and answer the following questions: A case control study was conducted to evaluate the relationship between direct sun exposure and skin cancer. 150 Cases and 100 controls were recruited from Al Wehda hospital. A data collecting method was distributed among both controls and cases. Analysis of data revealed that 70 of cases were exposed to active smoking while only 40 of controls were exposed. Construct a 2 by 2 table to demonstrate the two dichotomous...
A case control-study was conducted looking at maternal exposure to amantadine, a suspected teratogen, and birth...
A case control-study was conducted looking at maternal exposure to amantadine, a suspected teratogen, and birth defects. The below 2 by 2 shows the data of the study Positive amantadine exposure No amantadine exposure Cases 15 350 Controls 7 950 Calculate the crude Odds Ratio. Does it appear that amantadine is associated with an increased risk of having a child with a birth defect? How would you interpret your Odds Ratio?
In a case control study published in 2013 risk factors for stroke in a population in...
In a case control study published in 2013 risk factors for stroke in a population in rural Tanzania were assessed. Of particular interest was HIV status. A total of 200 stroke cases from 2 districts were identified at hospitals and 398 controls, randomly selected from the background census population, frequency matched for age (+/- 3 years) and sex. A total of 26 cases were HIV positive compared to 16 controls. Q1 Complete the “2 by 2” table (including headers) below...
Question 22 0 out c In women with deep venous thrombosis (DVT), a case-control study was...
Question 22 0 out c In women with deep venous thrombosis (DVT), a case-control study was conducted to test the association between DVT and past exposure to oral contraceptive (OC) use. Based on the data below, what is the unadjusted odds exposure to OC use among the cases of women with DVT compared to that among the controls without DVT? Oral Yes No Total 67 108 23 152 175 175
A case-control study was designed to see if body piercing by unlicensed merchants was associated with...
A case-control study was designed to see if body piercing by unlicensed merchants was associated with an increased risk of hepatitis B compared to those receiving piercing from licensed merchants. Cases with clinically diagnosed hepatitis B were pair matched to controls without hepatitis B by age, sex, and number of previous body piercings. The results of the study appear in the table below. Based on the information, calculate the matched odds ratio, Controls Exposed Unexposed Cases 96 23 Exposed 87...
A case-control study was conducted to determine whether use of the anti-nausea drug Bendectin was associated...
A case-control study was conducted to determine whether use of the anti-nausea drug Bendectin was associated with an increased risk of birth defects. "Cases" were mothers whose children had been born with birth defects; controls consisted of mothers of similar age and socioeconomic status who had children without birth defects. Cases and controls were selected by the same mechanism. Information about drugs taken during pregnancy was recorded by interviewers. What kind of bias should you suspect this study might be...
Suppose you conduct a case-control study of endometrial cancer, with 200 cases and 200 unmatched controls....
Suppose you conduct a case-control study of endometrial cancer, with 200 cases and 200 unmatched controls. According to medical records (which we will assume are correct), 150 of the cases and 100 of the controls have used postmenopausal estrogens. (a) Construct the appropriate 2x2 table, and compute and interpret the odds ratio for endometrial cancer associated with postmenopausal estrogen use.
Question 3: 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. a. Set up a two-by-two table for this data. (2pts) b. Calculate the odds ratio. (3pts) C. State in words your interpretation...
Read the following research study and answer the following questions: A case control study was conducted to evaluate the relationship between direct sun exposure and skin cancer. 150 Cases and 100 controls were recruited from Al Wehda hospital. A data collecting method was distributed among both controls and cases. Analysis of data revealed that 70 of cases were exposed to active smoking while only 40 of controls were exposed. Construct a 2 by 2 table to demonstrate the two dichotomous...
Read the following research study and answer the following questions: A case control study was conducted to evaluate the relationship between direct sun exposure and skin cancer. 150 Cases and 100 controls were recruited from Al Wehda hospital. A data collecting method was distributed among both controls and cases. Analysis of data revealed that 70 of cases were exposed to active smoking while only 40 of controls were exposed. Construct a 2 by 2 table to demonstrate the two dichotomous...
Question 22 0 out c In women with deep venous thrombosis (DVT), a case-control study was conducted to test the association between DVT and past exposure to oral contraceptive (OC) use. Based on the data below, what is the unadjusted odds exposure to OC use among the cases of women with DVT compared to that among the controls without DVT? Oral Yes No Total 67 108 23 152 175 175
A case-control study was designed to see if body piercing by unlicensed merchants was associated with an increased risk of hepatitis B compared to those receiving piercing from licensed merchants. Cases with clinically diagnosed hepatitis B were pair matched to controls without hepatitis B by age, sex, and number of previous body piercings. The results of the study appear in the table below. Based on the information, calculate the matched odds ratio, Controls Exposed Unexposed Cases 96 23 Exposed 87...
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