In a cohort study, men were classified as having high or low cholesterol levels. Among the group with low cholesterol levels there were 50 heart attacks in 5000 person-years of follow-up and among the group with high cholesterol levels there were 150 heart attacks in 6000 person-years of follow-up.   1. What was the incidence of heart attack among men with low cholesterol levels? 2. What was the incidence of heart attack among men with high cholesterol levels?  3. What was the incidence of heart attack all men?  4. If high cholesterol levels are a cause of heart attack, what proportion of heart attacks in men could theoretically be prevented if nobody had a high cholesterol level?

14:58 bip O O₂ اس اس 0 Investigators enrolled 40 diabetics without eye disease in a cohort (follow-up) study. The results of the first 3 years were as follows: Year 1:0 cases of eye disease detected out of 32; 8 lost to follow-up Year 2: 2 new cases of eye disease detected out of 28; 2 had died; 10 lost to follow-up Year 3: 3 new cases of eye disease detected out of 14; 2 more had died; 5 more lost to follow-up The person-time incidence rate is calculated as: Select one: O a. 5/65 O b. 5/72 O c. 5/85 O d. 5/90

A cohort study was conducted to investigate the association between alcohol consumption and bladder cancer. The study population includes 200 men in Community X who were aged 55-69 years at baseline. All subjects completed a self-administered questionnaire which includes common risk factors for cancer including alcohol consumption patterns. Subjects were followed up for 6 years through record linkage to cancer registries. Table 1 shows the data gathered at the end of the follow-up period. Calculate the ff: Risk differencePopulation attributable fractionAttributable number

1- New York’s infant mortality rate in 2001 was 10.7 per 1,000 live births. New Jersey’s infant mortality rate in 2001 was 3.8 per 1,000 live births. Calculate the ratio of the infant mortality rate in New York to that in New Jersy. 2- Calculate the proportion of men in the NHANES follow-up study who were hypertension. 189 hypertension men Total number of men = 3,340

What are five variables that might be important to include, and define the outcome for a cross-sectional study design that assesses the risk of developing type 2 diabetes among obese people?

Please answer both.... Otherwise I will give downvote

The following 8 elderly women were residents of an assisted living facility and were followed by the same doctor for 12 years. The table below describes events that occurred during the 12-year period.    Subject Outcome Person-Years Case Y/N PrevalenceNum / Denom A Followed for the full 12 years.  At the end of year 3, she was diagnosed with Alzheimer’s disease.       B Died at the end of year 6 and never had Alzheimer’s disease.       C Died at the end of year 3 and never had Alzheimer’s disease.       D Diagnosed with Alzheimer’s disease at the end of year 1 and died at the end of year 8.       E Lost to follow-up at the end of year 6 and never had Alzheimer’s disease.       F Died at the end of year 6.  At the start of the study, she had already had Alzheimer’s disease for 2 years.       G Lost to follow up at the end of year 9.  At the end of year 4, she was diagnosed with Alzheimer’s disease.…

4586 patients were recruited in a study and information was collected on their different diseases / conditions. The prevalence of different diseases are: depression, 15%; asthma, 6.6%; cardiovascular event, 6%; pulmonary disease, 3.5%. The patients’ dietary intake were also measured at the same period of time. a. What is the research method used in the above study? ___________________________________________________________ b. State one advantage and one disadvantage of this type of study? ___________________________________________________________ d. What is the number of people with asthma in this group of patients? ___________________________________________________________