NBME 4 Block 1 - 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 1 Forum

USMLE Step 1 Forum USMLE Step 1 Discussion Forum: Let's talk about anything related to USMLE Step 1 exam


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 03-06-2012
USMLE Forums Veteran
 
Steps History: Not yet
Posts: 270
Threads: 34
Thanked 223 Times in 119 Posts
Reputation: 233
Default NBME 4 Block 1

Q17:
I picked C. So why do we multiply the 2 percentages rather than add them. Since they are percentages and we are equating them to a total population of 100, shouldn't we add them???

Q21:
I picked F. Ok so I am a little confused here. In the stem they are describing UML. So shouldn't that be the anterior horn lesion which will cause this problem???

Q40:
How do you calculate this??

Q41:
Ok I got the right answer based on the stem. What are they showing in the image, what is that on the LT side of the picture??
Reply With Quote Quick reply to this message



  #2  
Old 03-06-2012
Hitman's Avatar
USMLE Forums Master
 
Steps History: Not yet
Posts: 928
Threads: 17
Thanked 539 Times in 375 Posts
Reputation: 549
Default

Qs 17 I found the ans to be D .... No needed to treat is = 1/Absolute risk reduction

so Absolute risk reduction = event rate (control ) - event rate ( treatment )

so its = 10.1 % - 5.4% =( 10.1 % - 5.4 )/100

now NNT = 1/Absolute risk so 1/( 10.1 % - 5.4 )/100 = 100 / ( 10.1 % - 5.4 ) = 21

the method of calculation of Absolute risk is correct as i had the similar Qs in UW which i have written in FA

Qs 21 its H ....... yes its a UMN lesion so its CST lesion ...... ant horn lesion results in LMN as in amylotrophic lateraL sclerosis ...

Qs 40 . its simple Gfr = K ( Pgc - Pbc ) - ( # gc - # bc )

so = 10 ( 45 - 12 ) - ( 23 - 0 ) = 30

Qs 41 could be the renal capsule or some muscle fibre dont know for sure

need help with 47 , 48 ....

45 is B and 46 is C ........ check this once .....
Reply With Quote Quick reply to this message
  #3  
Old 03-06-2012
USMLE Forums Veteran
 
Steps History: Not yet
Posts: 270
Threads: 34
Thanked 223 Times in 119 Posts
Reputation: 233
Default

Q45:
B is right

Q46:
C is right

Q47:
Childhood irradiation increases risk of Papillary CA of thyroid (in FA). It is the long term complication. So G, palpation of thyroid gland is a must on physical exam.

Q48:
Remember that one question from the other NBME....L and D form. They are testing the same principle here. The structure is the same as they tell you in the stem, but the form is different so will not be broken down as quickly.
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
NBME 6 block 3 Hitman USMLE Step 1 Forum 6 3 Weeks Ago 04:07 PM
NBME 3 Block 4 Discussion haga USMLE Step 1 Forum 4 04-20-2012 08:16 PM
NBME 6 block 4 Hitman USMLE Step 1 Forum 3 02-29-2012 09:44 AM
NBME 1 Block 4 haga USMLE Step 1 Forum 14 02-25-2012 11:40 PM
NBME 1 block 4 qn 17 aktorque USMLE Step 1 Forum 9 03-07-2011 11:02 PM

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)