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1. Gordis Chapter 18 homework answers The next 4 questions are based on the following: A new screening program was instituted in a certain country. The program used a screening test that is effective in detecting cancer Z at an early stage. Assume that there is no effective treatment for this type of cancer and, therefore, that the program results in no change in the usual course of the disease. Assume also that the rates noted are calculated from all known cases of cancer Z and that there were no changes in the quality of death certification of this disease. What will happen to the apparent incidence rate of cancer Z in the country during the first year of this program?

   Incidence rate will increase

   Incidence rate will decrease

   Incidence rate will remain the same

1 points

QUESTION 7

1. What will happen to the apparent prevalence rate of cancer Z in the country during the first year of this program?

   Prevalence rate will increase

   Prevalence rate will decrease

   Prevalence rate will remain the same

1 points

QUESTION 8

1. What will happen to the apparent case-fatality rate for cancer Z in the country during the first year of this program?

   Case-fatality rate will increase

   Case-fatality rate will increase

   Case-fatality rate will remain constant

1 points

QUESTION 9

1. What will happen to the apparent mortality rate from cancer Z in the country as a result of the program?

   Mortality rate will increase

   Mortality rate will decrease

   Mortality rate will remain the same

1 points

QUESTION 10

1. The best index (indeces) for concluding that an early detection program for breast cancer truly improves the natural history of the disease, 15 years after its initiation, would be:

   A smaller proportionate mortality for breast cancer 15 years after initiation of the early detection program compared to the proportionate mortality prior to its initiation

   Improved long-term survival rates for breast cancer patients (adjusted for lead time)

   A decrease in incidence of breast cancer

   A decrease in the prevalence of breast cancer

   None of the above