Biostatestics - 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 > General Topics Forum > General Topics Recommended Threads

General Topics Recommended Threads Highly Recommended and Useful USMLE General Topics Threads.


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 06-29-2017
USMLE Forums Newbie
 
Steps History: Not yet
Posts: 1
Threads: 1
Thanked 0 Times in 0 Posts
Reputation: 10
Default Biostatestics

*Sensitivity (SN) : % with disease who test positive = TP/(TP+FN)
*Specificity (SP): % without disease who test negative = TN/(FP+TN)
*PPV:% positive test results that are true positives= TP/(TP+FP)
*NPV: % negative test results that are true negatives = TN/(FN+TN)
*TP = (Sensitivity) X (# of pt actually with disease)
*FN = (1- Sensitivity) X (# of people actually with the disease)
*TN = (Specificity) (# of pt actually without disease)
*FP = (1- Specificity) (# of pt actually without disease)
*Cut-off point may be adjusted to optimize sensitivity and specificity, which are inversely related (cut-off point with decreased sensitivity is associated with increased specificity and vice-versa)
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

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Find Us on Facebook
Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

USMLE® & other trade marks belong to their respective owners, read full disclaimer
USMLE Forums created under Creative Commons 3.0 License. (2009-2019)