Reference no: EM133454886

Assignment:

1.- In the medical examination of the employees of a battery factory (46 women and 29 men) 60 people were found with high levels of lead in their blood, of these 27 are men. Of the total number of people with high blood lead levels, 8 were new cases this year, of that total 5 are men.

• What is the overall prevalence of people with high blood lead levels?
• What is the prevalence according to sex?
• What is the incidence?

2.- In an evaluation, by the Environmental and Occupational Medicine Program, of the employees of a petrochemical industry in which 500 people work, it was found that there were 40 diabetics. During that evaluation period, the doctor found 10 people with diabetes who had never been diagnosed. What is the prevalence of diabetes in that company? What was the incidence of diabetes in the evaluation period?

3. On Monday, after a Friday of collection, the staff of the Environmental and Occupational Medicine Program of the mattress factory En las nubes, decide to do doping tests. Of 100 employees sampled, 15 tested positive for marijuana and 8 tested positive for cocaine. Of the 15 employees positive for marijuana, 10 were repeat users and of the 8 positive for cocaine, 3 were repeat offenders. Indicate the incidence and prevalence point for drugs in general and for each of the two substances independently.

4. In an environmental health investigation carried out during the years 2000 to 2010, it was found that in the metropolitan area there were 20,000 cases of dengue, of which 500 people died due to the disease. What is the case fatality ratio (CFR) for dengue in the metropolitan area during that period?

5. In a control case among women residing in a metropolitan city, to determine if there was a relationship between exposure to electromagnetic fields and breast cancer, subjects under 75 years of age and who had lived in the city for 15 years or more were used. The cases were 576 women diagnosed with breast cancer. Control cases were 585 randomly selected subjects in the same city. Of the cases it was found that 300 were exposed to electromagnetic fields and of the controls 500 were exposed to electromagnetic fields as well. Construct the table for case control and determine the estimated relative risk in this case.

6. In a study to determine if a solvent was associated with liver cancer, it was found that, in a cohort of industrial employees, three people who used the solvent in their work developed liver cancer and 104 did not. Two cases of liver cancer occurred in employees who were not exposed to the solvent in the same type of industry. The remaining 601 unexposed employees did not develop cancer. Determine the relative risk of developing cancer in the cohort studied. Make the table for the cohort studied.

7. One study looked at the health impact of occupational exposure to insecticides. The researchers selected a cohort of 1,999 workers known to have carried out field work during the period 1935-1999 for the New South Wales Board of Tick Control. Only men were selected for the study. The control cohort consisted of 1,984 men who had done fieldwork since 1935. Of the exposed cohort, 500 were found to develop liver cancer and of the unexposed, 10 were found to develop liver cancer. Construct the table for the cohort studied and determine the relative risk for liver cancer.