PSS CASE CONTROL

Choose the direction of Case-Control study

• A

• B

• C

• D

Arrange the order/ steps in conducting Case-Control Study

(P) - Measure the Exposure

(Q) - Select the Cases

(R) - Select the Controls

(S) - Analyse the differences

(T) - Define the Cases

• T - R - Q - P - S

• Q - T - R - P - S

• T - Q - R - P - S

• R - Q - P - S - T

Which of the following is the advantage of Case-Control study?

• A. Can generate incidence data

• B. Good for diseases with long latency period

• C. Can study multiple diseases at the same time

• D. Has the strongest level of evidence among the observational study

A researcher wants to find out the association between low serum Vitamin D with fractures among children under 6 years old. 206 children were recruited from the fracture clinics and 300 friends from local primary schools were selected to participate in this study.

150 children from the fracture clinic and 225 of their friends had a normal serum Vitamin D

Calculate the odds ratio

• 0.49

• 0.89

• 1.09

• 1.12

A researcher conducted a population-based case-control study to find out the association between pesticide use and diabetes among Thai farmers. Lifetime pesticide exposure and other relevant data were collected from 866 participating cases with diabetes mellitus and 1021 healthy controls. 227 diabetic farmers reported chronic use of pesticides compared to only 223 from the non-diabetic group. Calculate the odds of being diabetic from chronic use of pesticide.

• 0.78

• 1.20

• 1.22

• 1.27