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129800 Physiology

As a pa of space-research program, a physiologist was asked to investigate the effect of flight-induced stress on blood pressure. Accordingly, the blood pressure of the cosmonauts were to be measured twice: once before the takeoff and once after the spacecraft entered the designated orbit around the eah. For a proper comparison, the preflight blood pressure should be recorded in:

AThe lying down position
BThe sitting position
CThe standing position
DAny position, as long as the post-flight recording is made in the same position
Physiology
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129805 Social & Preventive Medicine

Bias is defind as?

ASpurious association between two variables
BA quantified relationship between exposure and disease
CSystematic error in determination of association between exposure and disease
DStatistical technique used to evaluate the effect of a treatment by comparing treated and non treated
Social & Preventive Medicine
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