Question

Investigators were conducting a study regarding the effects of water pollution and peptic ulcer disease.-A population of 9,000 men and women, aged 45, were examined on January 1, 1985.-Of these people, 6,000 EXPOSED to toxins in the local water supply and 3,000 were not.-At the time of this exam, 90 cases of peptic ulcer disease were discovered; 60 of these cases were among those exposed to toxins in their local water.-All the people at the initial exam who were free from peptic ulcer disease were followed with repeat exams over the following year. This study revealed 268 new cases in the total group; of these, 238 cases were among those exposed to toxins in their local water.

Calculate the PREVALENCE per 1,000 people of peptic ulcer disease.

Answer 1

The prevalence of peptic ulcer disease can be calculated by dividing the number of cases by the total population and multiplying by 1000.

Step-by-step explanation:

The prevalence of peptic ulcer disease can be calculated by dividing the number of cases by the total population and multiplying by 1000.

In this case, there were 90 cases of peptic ulcer disease among a population of 9000. To calculate the prevalence, divide 90 by 9000 and then multiply by 1000:

Prevalence = (90/9000) x 1000 = 10 per 1000 people

Therefore, the prevalence of peptic ulcer disease in this population is 10 cases per 1000 people.