Most accurate statement - USMLE Forums
USMLE Forums Logo
USMLE Forums         Your Reliable USMLE Online Community     Members     Posts
Home
USMLE Articles
USMLE News
USMLE Polls
USMLE Books
USMLE Apps
Go Back   USMLE Forums > USMLE Step 2 CK Forum

USMLE Step 2 CK Forum USMLE Step 2 CK Discussion Forum: Let's talk about anything related to USMLE Step 2 CK exam


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 09-18-2012
K06100's Avatar
USMLE Forums Master
 
Steps History: 1+CK+CS+3
Posts: 730
Threads: 90
Thanked 456 Times in 289 Posts
Reputation: 466
Default Most accurate statement

A group of researchers at the state university
conducts a study investigating the relationship
between cigarette smoking and vascular dementia.
Retrospective data are obtained from a
cross-sectional survey on smoking habits and
later neurologic symptoms as observed by close
relatives. Researchers fi nd that smokers are
four times as likely as nonsmokers to suffer
from vascular dementia and that they also consume
twice as much alcohol as nonsmokers in
their study. Which of the following statements
could be accurately made on the basis of the
available information?

(A) Both alcohol and cigarettes independently
increase the risk for vascular dementia
(B) Drinking alcohol increases the risk for vascular
dementia
(C) Smokers are more likely to drink than nonsmokers
(D) Smoking cigarettes increases the risk for
vascular dementia
(E) Smoking increases the risk for vascular dementia,
but alcohol has no effect on the
risk
__________________
Try Not To Become A Man Of Success But A Man Of Value.
Reply With Quote Quick reply to this message
The above post was thanked by:
step1an (09-18-2012)



  #2  
Old 09-18-2012
USMLE Forums Master
 
Steps History: 1+CK+CS
Posts: 1,867
Threads: 149
Thanked 2,086 Times in 1,046 Posts
Reputation: 2106
Default

(C) Smokers are more likely to drink than nonsmokers

You cannot have causality from a retrospective study, only association
__________________
A man doesn't know what he knows until he knows what he doesn't know.
“What is man? He's just a collection of chemicals with delusions of grandeur.”
Reply With Quote Quick reply to this message
The above post was thanked by:
K06100 (09-18-2012)
  #3  
Old 09-18-2012
K06100's Avatar
USMLE Forums Master
 
Steps History: 1+CK+CS+3
Posts: 730
Threads: 90
Thanked 456 Times in 289 Posts
Reputation: 466
Default

Quote:
Originally Posted by Novobiocin View Post

You cannot have causality from a retrospective study, only association
Sir, After reading this line of urs , I opened KLN behavior science step 1 chapter 1 page 13 table 1-8 ....thrs written that retrospective studies can tell about the causality......!!!!!
__________________
Try Not To Become A Man Of Success But A Man Of Value.
Reply With Quote Quick reply to this message
  #4  
Old 09-18-2012
USMLE Forums Master
 
Steps History: 1+CK+CS
Posts: 1,867
Threads: 149
Thanked 2,086 Times in 1,046 Posts
Reputation: 2106
Default

Quote:
Originally Posted by K06100 View Post
After reading this line of urs , I opened KLN behavior science step 1 chapter 1 page 13 table 1-8 ....thrs written that retrospective studies can tell about the causality......!!!!!
You are right but only under the "Rare disease assumption" rule.

Read the UW QID 4109

Quote:
The rare disease assumption is a mathematical assumption in epidemiologic case-control studies where the hypothesis tests the association between an exposure and a disease. It is assumed that, if the prevalence of the disease is low, then the odds ratio approaches the relative risk.
Case control studies are relatively inexpensive and less time consuming than cohort studies. Since case control studies don't track patients over time, they can't establish relative risk. The case control study can, however, calculate the exposure-odds ratio, which, mathematically, is supposed to approach the relative risk as prevalence falls.
__________________
A man doesn't know what he knows until he knows what he doesn't know.
“What is man? He's just a collection of chemicals with delusions of grandeur.”
Reply With Quote Quick reply to this message
The above post was thanked by:
Carolina_USMLE (12-26-2013), K06100 (09-19-2012)
  #5  
Old 09-18-2012
USMLE Forums Master
 
Steps History: 1+CK+CS
Posts: 851
Threads: 88
Thanked 706 Times in 379 Posts
Reputation: 716
Default

Answer D.......
__________________
"Don't Forget they need us too"
Reply With Quote Quick reply to this message



Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the USMLE Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Medical School
Choose "---" if you don't want to tell. AMG for US & Canadian medical schools. IMG for all other medical schools.
USMLE Steps History
What steps finished! Example: 1+CK+CS+3 = Passed Step 1, Step 2 CK, Step 2 CS, and Step 3.

Choose "---" if you don't want to tell.

Favorite USMLE Books
What USMLE books you really think are useful. Leave blank if you don't want to tell.
Location
Where you live. Leave blank if you don't want to tell.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
How accurate is UWSA? iceman_purav USMLE Step 2 CK Forum 11 07-09-2012 12:43 AM
most accurate test ag2011n USMLE Step 2 CK Forum 3 09-21-2011 09:07 AM
Is MatchAResident Accurate? Cocochanel IMG Residency Match Forum 0 08-11-2011 10:48 AM
How Accurate is UW self-assessment for CK carisma_200x USMLE Step 2 CK Forum 3 12-28-2010 09:53 AM
How Accurate is UWSA-1 khushboo USMLE Step 1 Forum 3 12-03-2010 06:15 AM

RSS Feed
Find Us on Facebook
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

USMLE® & other trade marks belong to their respective owners, read full disclaimer
USMLE Forums created under Creative Commons 3.0 License. (2009-2014)