5 epidemiology questions with statistic calculation

Epidemiology Question 1

(Total 10 pts.)

Please draw a 2×2 table adding the following descriptors:

o Exposure

o No-exposure

o Diseased

o Healthy

…and add the letters “A”, “B”, “C” and “D” to the four boxes (4 pts.):

 

Referring to your 2×2 table above, give the formula that needs to be used to calculate the values listed below. Use the letters A, B, C and D in the numerator and denominator in your formulas:

 

Relative Risk (2 pts.):

 

Odds Ratio (2 pts.):

 

Exposure Rate (2 pts.):

 

Question 2 (Total 12 pts.)

Draw flow diagrams for the three study designs listed below and list the advantages and disadvantages of each.

o Case-control study (2 pts.):

Advantages (1 pt.) Disadvantages (1 pt.):

 

o Cohort study (2 pts.):

 

Advantages (1 pt.): Disadvantages (1 pt.):

 

o Experiment (2 pts):

 

Advantages (1 pt.): Disadvantages (1 pt.):

 

Epidemiology Question 3

(Total 12 pts.)

Please draw a 2×2 diagnostic test table adding the following descriptors: o Test outcome – positive

o Test outcome – negative

o Patient has the disease

o Patient does not have the disease

o True positive

o False positive

o True negative

o False negative

 

….. and add the letters “A”, “B”, “C” and “D” to the four boxes (8pts.):

 

Referring to your 2×2 table drawn above, give the formulas for calculating the parameters listed below. Use the letters A, B, C and D in the numerators and denominators:

 

Sensitivity (2 pts.):

 

Specificity (2 pts.):

 

Epidemiology Question 4 (Total 4 pts.)

Briefly explain the potential advantages and disadvantages associated with the following outcomes in a community diagnostic screening test:

 

False positive (2 pts.):

 

False negative (2 pts.):

 

Epidemiology Question 5 (2 pts.)

Briefly explain why randomization in test subject assignment to either the exposure group or the “control” group in an experimental design is important.

 

Last Updated on February 11, 2019 by Essay Pro