Understanding and appraising evidence Flashcards
1
Q
Benefits of male circumcision?
A
reduce risk of sexually-acquired HIV infection in men by 60%
2
Q
How can HIV prevalence be tested?
A
Blood/saliva testing (ELISA)
Self report
3
Q
What are problems with different methods of determining prevalence?
A
point prevalence - determine whose data available on census day (participation bias)
what is relevant denominator population
self reporting errors (HIV and circumcision)
sensitivity (positives/true positives)
specificity (negatives/true negatives)
4
Q
What does relative risk mean?
A
risk of x is more than y times higher in exposed than unexposed
