need help with your account or subscription? click here to email us (or see the contact page)
join telegramNEW! discord
jump to exam page:
search for anything ⋅ score predictor (โ€œpredict me!โ€)

NBME 20 Answers

nbme20/Block 1/Question#43 (reveal difficulty score)
A randomized clinical trial is conducted to ...
Neither procedure is superior ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
tags: biostats

 Login (or register) to see more


 +14  upvote downvote
submitted by โˆ—strugglebus(189)
get full access to all contentpick a username

The CI value contained 1, which means that its insignificant

get full access to all contentpick a username
sympathetikey  Correct. Per first aid: "If the 95% CI for odds ratio or relative risk includes 1, H0 is not rejected." +2
xxabi  Ah that makes more sense, thanks! +
drdanielr  Since the OR or RR is a ratio, if the two interventions are equal the ratio would be 1. So, if the CI includes 1, they are "the same" or not stat sig diff +



 -9  upvote downvote
submitted by โˆ—xxabi(293)
get full access to all contentpick a username

I think its that the CI contained the number "0" which makes it statistically insignificant

get full access to all contentpick a username
kernicterusthefrog  You're thinking about CI for a **mean difference** b/w 2 variables. This question talks about **relative risk**, for which 'strugglebus' correctly asserts that *a CI including 1 fails to reject the null hypothesis*. #funwithformatting +
xxabi  Ahhhh you're right, I definitely had them mixed up! Thanks! +2
xxabi  #biostatsisthebaneofmyexistence +5
conradfussurefake  So am I the only one giving no shit about CI and going straight to what they're asking about. My understanding of the question is that they're asking about the difference in cosmetic results of both the procedure which are described in the stem as the same. The study isn't about wound infection rate!! +
fatboyslim  @conradfussurefake In the beginning of the Q stem it states "A randomized clinical trial is conducted to compare WOUND HEALING and cosmetic differences...", hence wound infection will affect wound healing. But the because the CI contained the value of 1, it is insignificant. +2



Must-See Comments from nbme20

amorah on Cytomegalovirus infection
masonkingcobra on Contact with parakeets
hayayah on Capillary hydrostatic: increased; ...
hayayah on X chromosome-linked isoenzymes
medbitch94 on Mannose 6-phosphate
hello on Capillary hydrostatic: increased; ...
hayayah on Osteoblasts
imgdoc on Hypophosphatemia
hayayah on Missense
celeste on 50%
justgettinby on Omeprazole
andrewk1 on Cold, dry air
yotsubato on Jugular venous pressure of 12 mm Hg
strugglebus on Drug effect

search for anything NEW!