Frequency Flashcards
2014-18
A cohort has 100 subjects and at the beginning of the study, 10 have heart disease. After 2 years, 20 have heart disease. What is the annual incidence?
a. 5.5%
b. 10%
c. 11%
d. 20%
C
2014-18
There’s a virus called OHNO Virus. At the airport (?), passengers were screened for the virus infection. Out of 5000 passengers, a sample composed of 100 was taken. They were screened and it was found out that 2 were positive for the OHNO Virus. 4 Weeks later, the passengers were followed up. 15 of them developed pneumonia and other symptoms associated with the OHNO viral infection.
What is the prevalence of the OHNO Virus among the passengers?
17% or 17/100
2014-18
There’s a virus called OHNO Virus. At the airport (?), passengers were screened for the virus infection. Out of 5000 passengers, a sample composed of 100 was taken. They were screened and it was found out that 2 were positive for the OHNO Virus. 4 Weeks later, the passengers were followed up. 15 of them developed pneumonia and other symptoms associated with the OHNO viral infection.
Using the scenario above, what is the incidence of the OHNO virus?
a. 13/98
b. 13/4998
c. 15/100
d. 15/5000
A
2014-18
There’s a virus called OHNO Virus. At the airport (?), passengers were screened for the virus infection. Out of 5000 passengers, a sample composed of 100 was taken. They were screened and it was found out that 2 were positive for the OHNO Virus. 4 Weeks later, the passengers were followed up. 15 of them developed pneumonia and other symptoms associated with the OHNO viral infection.
The population in the case is
a. Dynamic
b. Fixed
c. Blah Blah
d. Something else
B
2014-18
In Cambodia, the month of April, 59 children were diagnosed with viral illness. 52 died of the disease. The
preliminary report resulted travel advisory in Cambodia. The disease is caused by a virus related to foot and mouth disease. In June, 75000 children consulted in outpatient clinics and only 34 were hospitalized. WHO determined that is was Enterovirus 71…
What is the best frequency distribution study to determine if enterovirus is epidemic?
a. Case fatality rate
b. Incidence
c. Prevalence
d. # of new cases
B
2014-18
In Cambodia, the month of April, 59 children were diagnosed with viral illness. 52 died of the disease. The
preliminary report resulted travel advisory in Cambodia. The disease is caused by a virus related to foot and mouth disease. In June, 75000 children consulted in outpatient clinics and only 34 were hospitalized. WHO determined that is was Enterovirus 71…
Possible case fatality rate of the virus among children in Cambodia?
a. 52/59
b. 52/75000
c. 34/75000
d. 59/75000
*
2014-18
Short duration of disease and increase prevalence of disease make the number of cases
a. Increase
b. Decrease
c. Any of the above
d. Same
*
