Jackofknives
Ipwnpoker.com
Topics: 91
Posts: 708
|
A study is designed to compare a new medication for Crohn disease with a standard medication. Each of 50 Crohn disease pts is allowed to decide which of these two treatment groups to join. The major reason that the results of this study may not be valid is because of
Selection bias
Recall bias
Sampling bias
Differences in the sizes of the two groups
The small number of pts in the study
___________________
There are many things in this world that can’t be changed no matter how hard you try. That’s why you must not hesitate when the time comes where you have to give it all you’ve got.
|
| robin082006
Forum Hero
Topics: 471
Posts: 5,125
|
Sampling bias (not blinded)
___________________
The Key to Succeed is Patience.
|
| new_n_lost
Politically InCorrect
Topics: 653
Posts: 6,085
|
Sampling bias
___________________
FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."
|
| junoon
Topics: 4
Posts: 47
|
sampling bias
|
| Jackofknives
Ipwnpoker.com
Topics: 91
Posts: 708
|
Answer is 1
___________________
There are many things in this world that can’t be changed no matter how hard you try. That’s why you must not hesitate when the time comes where you have to give it all you’ve got.
|
| test123
Forum Newbie
Topics: 5
Posts: 16
|
Answer is selection bias.
Refer BRS BEHAVIORAL SCIENCE 4TH EDITION PAGE 246-247.
|
| sfk
Forum Elite
Topics: 43
Posts: 294
|
why not a selection bias? HY mentions that selection bias can occur if subject is allowed to choose drug or placebo. Sampling bias occurs when factors unrelated to the aim of the study distinguish the subject from the rest of the population.
Kaplan mentions both of them together. Someone please clear it up for me.
___________________
Forum Elite, But Step 2 Newbie....
|
| Jackofknives
Ipwnpoker.com
Topics: 91
Posts: 708
|
this question is BS, in the literature there is no distinction between selection and sampling bias.
___________________
There are many things in this world that can’t be changed no matter how hard you try. That’s why you must not hesitate when the time comes where you have to give it all you’ve got.
|
| sfk
Forum Elite
Topics: 43
Posts: 294
|
but FA mentions the 2 seperately as well 
___________________
Forum Elite, But Step 2 Newbie....
|
| i_m_legend
Forum Newbie
Topics: 3
Posts: 43
|
First i think question is not well made...Still answer can be Selection bias.. but then looking literly at this question u think small number of patients would mean study is weak!
|
|
| |
| | | | | | | | | | |
