Question

In: Nursing

A. Researchers conducted a case control study to identify the association between alcohol consumption and esophageal...

A. Researchers conducted a case control study to identify the association between alcohol consumption and esophageal cancer among men. They enrolled 187 men with esophageal cancer and 715 men without esophageal cancer. The men were asked about their regular alcohol consumption and the men were categorized as either drinking ≥80 g/day (exposed) or <80 g/day (unexposed). Among the men with esophageal cancer, 92 drank ≥80 g of alcohol per day; 177 of the men without esophageal cancer drank ≥80 g of alcohol per day.

Calculate the odds ratio for the relationship between drinking ≥80 g/day of alcohol and esophageal cancer?

Write a 1 sentence interpretation of the odds ratio calculated in the previous question.

Write a 1 sentence interpretation of the odds ratio.

Solutions

Expert Solution

Parameters provided:

People with oesophageal cancer (cases) - 187

people without oesophageal cancer (controls) - 715

people who drank alcohol more than 80gm/day (exposed) among the cases - 92

people who drank alcohol more than 80gm/day (exposed) among the controls - 177

To calculate the odds ratio for the relationship between the exposure and the disease (cases) , a 2×2 table is used :

formula for odds ratio : ad/bc

ad/bc = 92×538 ÷ 177×95 =  2.94

Interpretation of odds ratio: OR > 1 : association is present

OR = 1 : No association

OR < 1 : Inverse association

To summarize, here, the odds ratio of 2.94 means - oesophageal cancer patients have 2.94 times more chance of reporting history of alcohol intake more than 80g/day ( exposure) as compared to the healthy people in this case control study.

​​​​


Related Solutions

Consider a case-control study of the possible association between alcohol consumption and the risk of esophageal...
Consider a case-control study of the possible association between alcohol consumption and the risk of esophageal cancer as reported by Tyns et al. (1977). The study entailed 200 males diagnosed with esophageal cancer in one of the regional hospitals between the years1972 and 1974, and controls were a sample of 775 adult males selected from electoral lists in each community. The data on alcohol consumption dichotomized at a value of 80 g/d for cases and controls are summarized below: Average...
Investigators conducted a case control study to determine if there was an association between asthma symptoms...
Investigators conducted a case control study to determine if there was an association between asthma symptoms and exposure to dust (dust or no dust). They collected information from 62 matched pairs of cases (those experiencing asthma symptoms) and controls (those not experiencing asthma symptoms). They entered their observed counts in SAS using the code below: data study; input case $ control $ count @@; cards; dust dust 10 dust no_dust 35 no_dust dust 12 no_dust no_dust 5 ; run; a)...
A hospital-based case-control study of alcohol consumption in relation to a particular type of cancer was...
A hospital-based case-control study of alcohol consumption in relation to a particular type of cancer was conducted. The investigators selected patients admitted for conditions that were not related to alcohol consumption as the control group. 200 controls were individually matched to 200 cases by age and sex. Alcohol consumption was assessed by an in-person interview conducted by a trained interviewer in the hospital (suggested length, a brief paragraph each for 1) to 3) below). Using epidemiological terminology, describe three potential...
Researchers at Johns Hopkins decide to use a case control study design to explore the association...
Researchers at Johns Hopkins decide to use a case control study design to explore the association between women with breast cancer and DDT exposure. They interview women that have breast cancer undergoing chemo at the Johns Hopkins Hospital in Baltimore in 2014 and then take blood samples to test for DDT exposure. They also enroll a group of controls (without breast cancer) in the study based on patient lists at the hospital and also test them for DDT exposure. They...
You conducted a study on the relationship between alcohol consumption and depression among college students in...
You conducted a study on the relationship between alcohol consumption and depression among college students in which you distributed a survey to 300 college seniors. Students who completed the survey responded to a standardized questionnaire measuring depression symptoms and to a series of questions about their typical alcohol consumption patterns. The results of your study indicated that the correlation between depression and alcohol consumption was +.34. Explain what this correlation means in terms of direction and strength. One possible explanation...
Researchers conducted a cohort study of the association between air pollution and asthma. The rate ratio...
Researchers conducted a cohort study of the association between air pollution and asthma. The rate ratio was 8.0, when comparing those exposed to high levels of air pollution with those exposed to low levels of air pollution. Which of the following issues should the researchers consider when making their study conclusions and when thinking about causality? Choose all that apply and explain your choice. a) The rate ratio of 8.0 indicates a strong association, which lends support for causality b)...
Tasmanian researchers conducted a case –control study to investigate the effect of dietary fat intake on...
Tasmanian researchers conducted a case –control study to investigate the effect of dietary fat intake on skin cancer. They hypothesised that people whose dietary fat intake is low will be more susceptible to skin cancer. The study compared 500 cases of melanoma with 500 controls who were randomly selected from the state’s electoral roll. The researchers categorised the dietary fat intake into three categories High, Moderate and Low. They found that among skin cancer patients 150 were classified at the...
Tasmanian researchers conducted a case –control study to investigate the effect of dietary fat intake on...
Tasmanian researchers conducted a case –control study to investigate the effect of dietary fat intake on skin cancer. They hypothesised that people whose dietary fat intake is low will be more susceptible to skin cancer. The study compared 500 cases of melanoma with 500 controls who were randomly selected from the state’s electoral roll. The researchers categorised the dietary fat intake into three categories High, Moderate and Low. They found that among skin cancer patients 150 were classified at the...
Question 3. A hospital-based case-control study of alcohol consumption in relation to a particular type of...
Question 3. A hospital-based case-control study of alcohol consumption in relation to a particular type of cancer was conducted. The investigators selected patients admitted for conditions that were not related to alcohol consumption as the control group. 200 controls were individually matched to 200 cases by age and sex. Alcohol consumption was assessed by an in-person interview conducted by a trained interviewer in the hospital (suggested length, a brief paragraph each for 1) to 3) below). 1) Using epidemiological terminology,...
Researchers conducted a study to determine the effects of different types of alcohol on the peak...
Researchers conducted a study to determine the effects of different types of alcohol on the peak alcohol concentration. In one part of the study, the researchers gave 15 randomly select males a controlled volume of vodka and monitored the subjects' alcohol concentration following the period of consumption. The legal limit for driving is 80 mg/dL (milligrams per deciliter of blood). A hypothesis test was conducted to see if the mean peak alcohol concentration from drinking vodka was different from the...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT