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 for comparison of the odds of being HIV positive in cases and controls.
Q2. Use the above table to calculate the odds ratio of being HIV positive in cases compared to controls
In a case control study published in 2013 risk factors for stroke in a population in...
In a case-control study by Bonita et al., the relationship between smoking and the incidence of premature stroke was assessed. The study included 132 cases (e.g. stroke) and 1,586 controls (e.g. no stroke). Among the cases, 66 were smokers. Among the controls, 424 were smokers. 1) If you set up a two by two table, what number would be A? 2) If you set up a two by two table, what number would be D? 3) If you set up...
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 examining the influence of sexual behaviour on Hepatitis B was conducted in a hospital between 2005 and 2008. The study recruited 229 Cases with Hepatitis B and 229 age- and sex-matched Controls. Both the Cases and Controls completed a questionnaire that inquired about the number of sexual partners they had in the past 2 years. Their responses were used to create the following exposure groups: 0 sexual partners (N=87), 1 sexual partner (N=257), and 2 or more...
In a pair-matched case-control study of risk factors for carcinoma, dietary history of 30 patients with the disease and 30 control subjects were collected. Below is a table that summarizes their history of corn and corn oil consumption. Pairs Cases - Carcinoma patients Controls - healthy subjects 1 Yes Yes 2 Yes Yes 3 Yes Yes 4 Yes Yes 5 Yes Yes 6 Yes Yes 7 Yes No 8 Yes No 9 Yes No 10 Yes No 11 Yes No...
Page 2 of 8 4. Fill in the blank. Ascribing the characteristics o is called the f a group to every individual in that group 5. Low body weight, substance abuse, or HIV infection can each individually cause a patient to evelop active TB disease without the other two factors, but only when followed by exposure to TB bacterium. Exposure to TB bacterium alone is not followed by active TB disease, but the active TB disease never occurs in the...
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...
I have this case study to solve. i want to ask which
type of case study in this like problem, evaluation or decision? if
its decision then what are the criterias and all?
Stardust Petroleum Sendirian Berhad: how to inculcate the pro-active safety culture? Farzana Quoquab, Nomahaza Mahadi, Taram Satiraksa Wan Abdullah and Jihad Mohammad Coming together is a beginning; keeping together is progress; working together is success. - Henry Ford The beginning Stardust was established in 2013 as a...
explaim the mechanisms amd toxological effects if type 1
diabetes in this article
Exposure to arsenic in drinking water is associated with increased prevalence of diabetes. We previously reported an association of diabetes and urinary concentration of dimethylarsinite (DMAS"), a toxic product of arsenic methylation by arsenic (+ 3 oxidation state) methyltransferase (AS3MT). Here we examine associations between AS3MT polymorphism, arsenic metabolism and diabetes. Fasting blood glucose, oral glucose tolerance and self-reported diagnoses were used to identify diabetic individuals. Inorganic...
All of the following questions are in relation to the following journal article which is available on Moodle: Parr CL, Magnus MC, Karlstad O, Holvik K, Lund-Blix NA, Jaugen M, et al. Vitamin A and D intake in pregnancy, infant supplementation and asthma development: the Norwegian Mother and Child Cohort. Am J Clin Nutr 2018:107:789-798 QUESTIONS: 1. State one hypothesis the author's proposed in the manuscript. 2. There is previous research that shows that adequate Vitamin A intake is required...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...