An investigator examining the effects of asbestos exposure on the risk of lung cancer in a retrospective cohort study among residents of Philadelphia found a measure of association of 2. This measure can best be interpreted as:
a. risk of lung cancer among those who did not have asbestos exposure was half that compared with those who had asbestos exposure
b. risk of asbestos exposure was twice as high among residents with lung cancer compared with residents without lung cancer
c. risk of lung cancer was 100% higher among those with asbestos exposure compared with those without asbestos exposure
d. A and B
e. A and C
Ans: e
You might also like to view...
In the neonatal option, the Maquet Servoi Ventilator has a bias flow of _____ L/min
a. 0.5 c. 1.5 b. 1.0 d. 2.0
Heat pain receptors will begin to fire when tissue temperature reaches
A) 109-113°F B) 99-103°F C) 104-108°F D) 114-118°F
Which ECG abnormality is characterized by the absence of a P wave, a wide bizarre QRS, followed by a T wave of opposite polarity?
a. PVC c. Atrial flutter b. PAC d. Sinus block
Patient records are used in medical research ________.
A. as a means to get research money B. only occasionally, because it is usually considered illegal C. to determine the average amount being paid for health insurance D. for experimentation with treatment that has not yet been approved E. for data regarding patient responses and side effects