Unit 7

Question 1

Experimental studies: lab experiments

Answer 1

looks at disease in a controlled, clinical environment to assess a chemotherapeutic agent on a disease or condition

total control over challenge/exposure and the envrionemnt

Question 2

Experimental studies: field experiments

Answer 2

deals with subjects who are disease gree and aim to evaluate whether an agent or procedure reduces the risk of developing disease among thoes free from that condition

little contort over the challenge and the environment

Question 3

control groups positive vs. negative

Answer 3

negative control group: is the intervention better than nothing?

positive control group: is a new intervention better than the old intervention

Question 4

complete randomized design

Answer 4

all individuals are randomly assigned to treatment or control group

Question 5

cross-over designs

Answer 5

each subject spends time in treatment and control group

Question 6

wish bias

Answer 6

introduced by the tendency of paitents or investigators to fit data or info into person scheme of how they believe thing ought to be

placebo effect

Question 7

differential admission bias

Answer 7

a form of slection bias where paitients with certain characterisitcs are more likely to be admitted