NSG 221 Herzing University -NSG 221 Exam 2 questions with complete solutions

NSG 221 Exam 2Epidemiology - correct answer is the study of the distribution and determinants of health and disease in human populations and is the principal science of public health. Web of Causation Model - correct answer illustrates the complexity of relationships among causal variables for heart disease. descriptive epidemiology - correct answer is the study of the amount and distribution of disease. Analytic epidemiology - correct answer investigates the causes of disease, or etiology Rates - correct answer are arithmetic expressions that help practitioners consider a count of an event relative to the size of the population from which it is extracted. They are population proportions or fractions in which the numerator is the number of events occurring in a specified period. The denominator consists of those in the population at the specified time period. This proportion is multiplied by a constant (k) that is a multiple of 10. The constant usually converts the resultant number to a whole number Incidence rates - correct answer describe the occurrence of new cases of a disease or condition in a community over a given period relative to the size of the population at risk for that disease or condition during that same period. The denominator consists of only those at risk for the disease or condition; therefore, known cases or those not susceptible are subtracted from the total population. Incidence rates are useful for detecting short-term changes in acute disease in which the duration of the disease is typically short. Incidence rate = number of new cases or events occurring in the population in a specified period divided by the population at risk during same specified period multiplied by "k." A prevalence rate - correct answer is the number of all cases of a specific disease or condition in a population at a given point in time relative to the population at the same point in time. Prevalence rate = number of existing cases in population at a specified point in time divided by the population at same specified point in time multiplied by "k."