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Biostatistics SUMMARY STEP 1 - The Basics USMLE
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- čas přidán 3. 06. 2015
- ESSENTIAL MATERIALS FOR USMLE STEP 1, 2CK, & 3 JOURNEY
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* The correlation coefficient (~25 min mark) isn't explained well and I acknowledge this. The main point to get across was the positive (line upwards to right) versus negative (line downward to right) directions. How tightly the dots correlate to the line is not explained in this video. +1 or -1 means the dots are "tightly" speckled on the line. Any number in between (ie. .3, -.2 etc...) and the dots are "loosely scattered". (see 2020 video for clarification)*
Feel free to email me at randy.neil8@gmail.com for notes or you can go to www.coastalmdl... to download. Good luck on exams!!
Randy Neil, MD
Why am I paying for Harvard's so called experts to teach me! You did more to show me how to set up a problem than my professor who wrote the book on biostats!
Ha... Thanks for the kind words. That's one of the kindest comments I could have gotten. Giggidee...giggidee...alright.
@@RandyNeilMD Lmao, heh heh, alright
lol at this humble brag
@@RandyNeilMD LOL at the QUAGMIRE reference!
😎
Incredible video my friend!! They should just play your videos at each school instead of hiring somebody to teach it worse than you can!
CZcams Medical School....add in Wiki and we can make it a fellowship. Sounds like a plan...ha
Mush thanks, mush love randy!
I was just about to comment this exact thing. My school did a terrible version of this with 1 hr of history and people associated with stats.
DirtyUSMLE agree !
@@RandyNeilMD Dear Randy I rarely reply but I must. Some years ago one of my friend learn something. I asked him how as in certain destination it was not available. He replied. CZcams UNIVERSITY. Today its truly a fact. Some idiots ok lets make it gentle fools do use it for spasms and all sorts of rubbish. Other for such a noble purpose to educate or get educated. I appreciate ur kind effort. As I have just started but feel that I am learning.Thanks agin.
3 years later taking Step 3 now and have come back here every time to watch this video on biostats cause it's honestly the best video out there!
same here
me too lol
26:20 FYI for those still watching this video, there is an error at 26:20! The Pearson correlation coefficient is D -0.2 because the dots are scattered with a "weak negative correlation". Answer choice E -1.0 would have all the dots in a straight line with a "strong negative correlation". Check First Aid 2019 page 263 for more information
Awang333 thanx man. You got it 👍🏻
Thanks!
excellent error pointed out. i was about to add this. the wider the spread out of points the weaker the number is and it has nothing to do with the slope.
@@doomsdayknight2229 can you explain the RR ques 24:24. plzz
@@UnknownStar08 Relative risk is for cohort studies. We know this is a cohort study because we have an outcome of prostate cancer and are looking retrospectively to see whether an exposure had some influence in occurrence of prostate cancer. In this case, the exposure is presence or absence of children.
With relative risk, you are looking at the risk of something between two groups. Because we are interested in comparing prostate cancer risk in men without children to men with children, we look at the risk of just prostate cancer in men without children (what we are interested in) and then compare to (divide by) prostate cancer in men with children.
Risk of prostate cancer in men without children: Prostate cancer and no children (80) divided by total men without children (1000)
Compare it (divided by) by the risk of men with prostate cancer with children.
Risk of prostate cancer in men with children: Prostate cancer with children (220) divided by men with children (1500)
So it should look like: Risk of prostate cancer in men without children (80/1000) / (220/1500) Risk of prostate cancer in men with children.
8 years ago , and 8 years later watching it
Gold will always be Gold
Works well for insomnia as well... :)). Thank you for the kind words.
You are the pathoma guy of statistics.....thanks a lot Dr...your style is magnificent
That was perhaps the best compliment I have ever received. Glad videos were helpful
+Randy Neil, MD......You deserve it.....successful teaching is a talent and you're talented
They were helpful man.
Thanks. Appreciate it
BEST!
I usually do not comment on CZcams videos, but I couldn't resist. I am currently studying for step 1 and I've understood something that had been taking me forever in just half an hour of watching your videos. Heroes don't always wear capes. Thanks so much!!!
Thanks for the kind words... too funny. Very glad it was helpful. After you crush STEP1..check back in.
@@RandyNeilMD Just checking in! Did well on both step 1 and step 2 ck with your help. Currently applying to med/peds and having a pretty successful application cycle!
@@sorayabascoy5838 holy you actually checked back in. dope.
@@sorayabascoy5838 so you didnt score that high?
@@quasimoto106 med/peds is combined internal medicine and pediatrics and very competitive, so they must have scored pretty high
I just took my exam yesterday, answered 99% of the questions from this and the part 2 video alone! Can’t thank you enough for making this!
PERFECT!!
where is part 2?
@@maybeokie czcams.com/video/VMI9UuNqoGI/video.html
3 months of UW and all I really needed was 20 mins. You're a God Sent savior. God Bless 🙌
Perfect. That's what the goal is. "There's got to be a better way..."
I passed my nbmes because of your videos. I improved my biostats and epidemiology sections tremendously. It made a difference in me passing or failing. Thank you sir you are great!
You have to love it when it all works out perfectly. Glad it was helpful.
Came here for step 1 and step 2, back for step 3. THANK YOU SO MUCH FOR ALL OF YOUR HELP!!!!!!
CRUSH IT!!
I have Step 1 in a week and was recommended this series!!!! It has changed everything!!!! Thank you for such clear, concise, ACTUALLY helpful strategies!!!!
I have been here for my step 1, step 2 CK and now step 3. I hope you realize how much value you add to people's life. Thank you isn't enough.
You can show appreciation by letting the adds run guys, Goodluck everyone.
Glad it was helpful. Be sure to take a peek at DRUG AD video for STEP 3...
@@RandyNeilMD I sure will, thanks again.
Having my step1 tomorrow…came back just to rewatch one last time.. thank you very much. ❤️
STAY CONFIDENT!!
Just went through the whole series having never read Biostats all through medical school and even kept avoiding it for step, I can easily conclude that Dr Randy is a legend.
Ganeev, Appreciate the kind words...
I return to this video annually for step 1, step 2 and now step 3. You are the best!
CRUSH STEP 3!!!
why staying hours in my class to struggle to understand what you make me understand in *30 minutes* ?
Man, GOD BLESS YOU!!!
this video should go around the world for saving millions of students lives!!! TKU!!!
Thank you for taking time to comment and give feedback.
I was here for Step 1, for Step 2, and now again for Step 3. Dr. Neil, you the best
Cristina... Thank you for the kind comment. For step 3, make sure to review DRUG AD video...
I remember watching these for Step 1, and here I am back again a year later for Step 2. Can't beat your videos for stats, thank you so much!
Thank you for taking time to comment... Videos will work all the way through board certification.
I somehow stumbled upon this video by chance, and it was like a gift from God. I kid you not, Dr. Neil's videos for Biostats are a God send for those studying for step 1. His videos helped me understand the First Aid portion better and apply them to Uworld questions. On top of that I emailed him and within a day he was kind enough to send me his one page notes, thank you Dr. Neil!
Randy.neil8@gmail.com. Just email me. I'll attach a copy
can i have one please? walcis001@hotmail.com .... thanks in advance
You've cured my biostatistics phobia, eternally grateful.
Dr. Neil is the MAN! Thank you for taking this extremely dry topic and making it easy. I've studied it for step 1 and step 2 and could not bear to do it again for step 3 but his approach has brought much needed relief. Also very impressed with his response to my request for a copy of the notes as he is no doubt busy with residency. Thanks again, doc!
I take Step 1 on monday and I learned infinitely more watching this video than I did in the first 2 years of med school. You are a beautiful person and I now feel confident in my abilities to tackle biostats on Step
CRUSH IT!! Keep me posted.
Thank you Dr Neil, I just passed my Step 1 exam, and all your biostat videos were incredibly helpful!!!
Thank you for posting your videos! I'm one of those non-traditional student and haven't seen or attempted any stats questions since the mid 90s. I would start sweating as soon as I saw a biostats question on any of my practice blocks. Originally, I would pick an answer and move on to the next question. I've stopped skipping them, and they no longer send into the panic zone. THANK YOU!
Dr. Neil's biostatistics review videos are an absolute must-watch for Step 1 studying! These lectures will give you an approach that you can consistently use to answer questions correctly. Forever grateful!
Thank you for the straight to the point, no nonsense, simplistic way of teaching a subject that a number of medical students find daunting!
Fasion, Glad it was helpful. Thank you for the comment.
High yield biostatistics lectures I have ever found .
With 'the' most enthusiastic teacher and teaching style its like a cakewalk in remembering most difficult and confusing topics of biostatistics (nightmare) of medicos . After going through these videos I was able to solve problems within no time.
I recommend these series for everyone . Loved it .
Great explanations. Your videos are awesome.
Thank you very much Randy .
Thank you for the great videos Dr. Neil.
I think the question at 6:00 is actually a retrospective cohort because the two groups were seperated based on the risk factor (being old or young) not the outcome (high or low score)
yes it should be cohort if we compare between the low scorer and high scorer and see in them how many are above 50 Yoa and below 50 Yoa than it will be case control
This is one of the best teaching videos I have watched on CZcams! Thank you so much :)
You are the teacher with the million subscribers... So I am humbled. Thanks for the comment
For biostats, it is the best video hands down :)
I am grateful to a random screenshot of a random post about biostat on fb where a guy recommended you. Cant thank you enough for making difficult concepts stick so easily. God bless you! And the way you have possibly responded to hundreds of people with your notes, I really appreciate it. :) I couldn't help but utter a prayer for you. Stay blessed.
Dr. Neil, you are absolutely amazing!! As an older guy, I struggle to approach many of these problems and in my opinion that's half the battle. Until you explained it, I would have messed these up for sure. Thank you so much, this is absolutely gold!
Glad it was helpful George. Stay focused, Stay POSITIVE!!!
Math is so much easier to understand when someone walks through the problems with you. This vid has been shared throughout our class as the quick stats review. thank you very much.
Glad it was helpful...go crush the STEP
I don't know how somebody can dislike this video. Phenomenal explanation. I leared this and passed step 1, and CK.
Now at the time of step 3, found your video and it became so easy.
I would really appreciate if you could make a video describing step 3 specific content.
Thanks for the kind words... Step3 only has biostats on day1. I'd say it roughly the same concepts but they have multiple drug ads which are hard to study for... if you know the basic concepts you will do well.
I highly recommend this video as a primer for people who struggle or want to refresh their basic biostats. Well done, Dr. Neil!
Thank you for the kind words
These videos would never get old! WAY WAYYYY ahead of time!
Thank you so much :)
Step 1 in 2 months...
STAY FOCUSED! STAY CONFIDENT!! Keep me posted on how the exam goes...
This video (and the accompanying one), is a MUST WATCH for anyone preparing for step 1! Simplified and to the point. Thank you Dr. Neil!
these videos are lifesavers . anybody weak in biostatistics MUST do them . thank you so much. emailed him for the notes and he replied so quickly with them . thank you so much again
I had watched them a year ago when preparing for step 1 , and now watching it again when preparing for step 2 . Thank you Randy, God bless you , Keep going!
Ahmed, It should work for STEP 2 as well...
This is my third time coming back to this video... watched it the night before STEP 1, 2, and now 3. Thank you!
The crazy part..it still works. CRUSH IT!!
Taking Step 1 tomorrow! This is the last video I will be watching! Thank you Dr Neil! The Pathoma of biostats!!
@Jacob Giles Sorry it took so long to reply. I did well! I'm just now starting residency
Thank you so much buddy. I don't think you realize how helpful it is to just have someone draw this out with you. Ofcourse its all in FA but having it in context is invaluable. I think someone mentioned it already but I think the only things you're missing is RRR, ARR, NNT and NNH. But they're pretty self explanatory.
Glad you found it useful. Good luck on the Step exams...
Fucking hate when someone uses the word Buddy!
@@shawnjonas7622 Chill buddy
@@shawnjonas7622 fuck u BUDDYYYYYYY
I looked around for so long and could not find any resource that would clear my queries regarding biostats until a friend send me the link to this. I have to say your videos are such a life saver! your teaching style is unmatchable.. yes!!! like they are saying you are the pathoma guy of statistics couldn't have said it better! Thank you!
Thanks for the feedback!!
@@RandyNeilMD coming back to this but now in residency :) Thank you so much for these videos Hands down still the best ones! :)
Dr. Neil doesnt have any idea how much he is helping students! So thankful to you sir. May God bless you! I suggest no one read the FA Biostats chapters, as you will learn nothing. Please watch Dr. Randy Neil videos!
Thank you Tahia for the kind words. Glad it is helpful.
Hands down the best review for biostat and epidemiology for USMLE. Short, sweet and to the point. Thank you so much for helping us all out. Learned way more in 30 minutes than hours of lectures at med school
I used this to study for biostats for Step 3, worked perfectly. Day 1 of Step 3 has a decent amount of Biostats, like 4 - 6 q per block, but this video will cover like nintety percent of what youll need
That's perfection!! Glad to hear it worked well for you.
@@RandyNeilMD I am taking my Step 3 in 2 days. And I have a degree in Biostats from Boston, but I STILL came back to your video for that high yield revision! You're AMAZING.
@@ashimadogra4523 Thank you for the feedback... CRUSH the STEP 3... Biostats was only on Day 1 from what I recall... pretty much teh same as STEP 1 and 2... Stay focused. Stay confident...
@@RandyNeilMD Aww thank you so much! You're the best!
Its 2023 and you are still saving students for the biostats section in step 1 ! We love you!!
Somethings may never change... :)
@@RandyNeilMD you are recommended by my medical school to watch your videos before step, that’s how good you are xoxo ! Thanks for being amazing!
Dr. Neil is the best. 1) these videos are succinct and clear 2) if you email him he will happily share his awesome notes and he responds super quickly! 3) he cares enough to share his knowledge and answer questions for tons of strangers. Thank you Dr. Neil!!!
taking step in 48 hours and this just saved my life
Keep Us Posted!!
i'm half way through the vid.... and mannnn i LOVE u for this... u r the best.. my step 1 is in few days.. and i'm doing my final revisions... and i needed this quick source for tackling the high yield stuff.... i wish u all the best
Not sure if I commented before, but I used these videos for Step 1 and 2, and now I'm back because I need to review bio stats for Step 3. Thanks Dr. Neil!
I like to hear it's STEP 3. Don't forget to look at DRUG ADs
I went and did a block of UWorld focusing on Biostats right after watching this video and its subsequent video (Part 2). It was SUPER reflective of all the questions he just did, I applied the same techniques taught by Dr. Neil and was rocking those questions.
Watching the two videos, that are about an hour long, completely overpowered the endless hours I've spent studying Biostats from Kaplan as well as First Aid.
Oh and by the way, he replied to my email right away and sent his notes. Wish I could give these videos a million thumbs up.
one of the best reviews of biostats for step 1; quick, efficient, and to the point. thank you!!
Error at 26:20: R (correlation coeffficient) is measure of linearity not slope. Correct answer should be D (-0.20), not E (-1.0)
Can you please clarify the answer please, as to why it is -1.0. Thank you in advance.
I agree with this. The correlation coefficient should be how close the dots are to the line...not the slope of the line.
I agree, a -1.0 would be a perfectly straight line with the dots, which clearly his example didnt have that distribution
Yea, this is incorrect. Closeness (of r) to 1/-1 is how well the line fits, NOT slope. Additionally, the way you calculate ARR (in the next vid) is different than what first aid says.
i came to comment this
Doing my last nbme later today and I’m watching this at 2 am! Thanks for explaining so well I finically understand power and p value !!!! You’re appreciated!
Dude, whoever and wherever you are, you saved my life. I mean, knowing the concepts is one thing, but learning an effective way to put them into practive on test day with super limited time is something else. This video is perfect. Just... thank you!!
Ana, I am glad to hear the video was helpful. Go CRUSH the exam!!
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I can’t thank you enough. Not all heroes wear capes 😭🙏
Thank you Ellie. Glad it was helpful.
Saved, liked, favorited, shared, appreciated... Can't thank you enough, Dr. Neil.
i have looked at this video the day before every test beginning with step 1. taking subspecialty boards tomorrow. good lord what a great video
Your style of teaching seriously reminds me of Dr. Sattar from Pathoma. The way you simplify things I can never forget them. Thank you so much for this!
The best video ever about bio statistics. Thanks Randy
+Daniel AM Perfect...do well on exam
OMG, my brain just clicked. Thank you so much! This was amazing!
You are moat welcome.
Sir Randy Neil,
I don't know if you'd read my comment or not but I would like to tell you've been a blessing in my life. When I started preparing for Step 1, I was worst at biostats and after watching your videos, I literally fell in love with the subject. Thank you so much. What you're doing for us students is amazing!
Mughal, I appreciate your comment. I appreciate you taking the time to leave a nice comment and feedback. LET'S CRUSH STEP 1, 2, & 3.!!!
Not all teachers are gifted in the art of teaching. Dr. Neil is truly a gifted teacher. Thank you so much for these videos!
This is the best stats vid I’ve seen on CZcams for med school students
You are amazing!!!!!!!!!! May God bless you and your family 🙌🏾🙌🏾😊😊
It's not even fair what I'm about to do to the bell curve on my COMLEX 3 tomorrow. I feel like I just experienced a personal Matrix kung-fu training montage. Thanks so much for this. I cannot believe how easy that box is to make at the beginning, and I brute-forced it all on the previous exams. All I had to do was draw the lines going each way and what they mean! Wild. Thanks so much for this and I hope this graces many med students (or interns) in the future. I will tell everyone I know this exists.
Confidence is half the battle. CRUSH IT!!!
I appreciate how you go through all these questions and explain them so well. Never before had I understood so well, Thanks so much!
PERFECT!!
this is an amazing video! I understand things a lot more because of your quick associations. It'd be great if you could post a pdf of the examples. Thanks a lot
these videos are soooo goood and to the point. i even recommended them to some test takers.You are helping out many examinee God bless you.
Dude! Where have you been?!! This is the only presentation that finally makes Biostats understandable. You really need to teach; and I do not tell many people that ever. It is a gift. Thanks so much!
Too funny...
I’ve ALWAYS HATED biostat but watching your videos made everything much more understandable than any course I’ve ever read. Thank you so much!!
You are most welcome.
What such a masterpiece is this !!
thank you so much .
You are most welcome.
2019 and still using the Lectures. Thanks a Lot Doctor Neil.
The Usmle is a very expensive journey and I can't thank you enough for providing high quality resources on youtube.. ❤
May the immense gratitude from strangers all over the world find you growing!🌟
You are welcome.
I've got an exam tomorrow and I cannot begin to tell you how thankful I am for this video. Perfect for a quick revision.
well i can say this is the best biostatistics video I've ever seen
its PERFECT
Good Job and i really appreciate ur efforts
This is all very high yield for the purposes of examinations.
Appreciate the feedback
Just took Step 1 last week and your videos covered EVERY SINGLE biostats question on my exam. Thanks very much.
Thank you so much Dr Neil, I graduated Med School and I just finally learned Biostatistics from watching your video. I was looking up Step 3 materials and came across your videos so I dropped everything that I was doing and watched your entire series. Thank you thank you thank you 1 gazillion times for giving back it surely helps someone like me. They really should use your videos in Med School as I saw someone mentioned below. It is not everyone who is able to simplify this Topic like you have done. Good luck in all your endeavors
Brooklyn Girl, Thank you for taking time to comment. Reading your comment does make me feel good about what we are trying accomplish. Helping the next guy in line... CRUSH that Step 3..!!
Is it possible to have a copy of the Notes please to jcklnsukie@gmaiI thank you Dr Neil
OMG doc , this video is so amazing- I have struggled with statistics for years and i can't believe you made it super easy ... i even asked my sister who is trainee psych from UK to check your videos . i can't wait to see all of your videos ... agree with every single comment here - you're a hero
Alka, Thank you for the comment. You are too kind... Let your sister know she is in the right profession... Psych is the place to be... just my opinion of course.
@@RandyNeilMD She loves psych but is struggling with stats for her exams- these videos will surely help her . I am a fan
You made it sound so easy! Thank you!!
Perfect...good luck with test
6:12 We are obtaining the Results(i.e. the outcome/ reality/ disease ) and the Age( exposure/ risk) at the same time so why is this not a cross-sec study? Please explain this Sir. I am so confused now.
I agree I thought this was cross-sectional.
In cross sectional we just determinate the incidence, like people who have age >50... & people who scored >200.
We do not establish association.
Here we are trying to answer the question "is there an association between old age & low scores?"
Got it??
best biostat USMLE video ever. everything is clear and easy. thank you very much. you just made my life easier.
Here since step1-3. ridiculous how easy to forget and quick to remember this stuff is.
Never fear... It's like coming Home.
Thanks for this awesome video! Question: at timestamp 6:43 wouldn't this study be a retrospective cohort, not a case control? The "exposure" is older age and the researchers started with two groups, exposed and not exposed (older and younger). Then they looked to see the outcome (high or low Step 1 score). Or is this not right? Thanks!
I agreed
agreed bro! I was also thinking same
Seriously? I hope you having a teaching gig somewhere and that they're paying you ALOT of money.
I wish...glad it was helpful.
Cannot thank you enough Dr. Neil. In the future, I will be recommending your videos to any MS1 student that asks for advice about studying Epidemiology/Biostatistics. I understood more in this 3 hour playlist than I ever did in an entire semester of lectures.
I'm glad the video has been helpful. It will work throughout entire STEP Exam process...
Dr Niel , just commenting to say thank you for your awesome work in these life saving biostat video . Just passed step 3 and could have not done it without your guidance through these simple yet important methods in takling these damn awful biostat problems . thanks !
CONGRATULATIONS for Passing Step 3!!! Such a relief I'm sure...
Thank you so much for the video, it's very helpful. But is there a typographical error when calculating the Relative Risk? As far as I understand it, it's (A/the horizontal total)/ (B/horizontal total). The denominator is the sum on the far right side not the sum at the bottom of the punnet square.
His table is set up differently. The question is also worded so that it basically asks for the inverse of the relative risk.
You are amazing......magically amazing
Thank u so much ❤ i got my result i passed step 1 .... i had struggles with biostat ... great work ... expecting more updates on recent biostat qns tht r asked .becoz i got some tough qns i havent seen 😅 ... i am really grateful fot this page
I did not believe it would be possible to simplify Biostats this much. I am in awe. Thank you so much for this one 🙌🙌🙌
Thanks randy
How many of you are using this video to study for the Step 3 now?👋 Ready to be over with biostatistics lol
C'mon.... you should be saying "bring it"... one of the few sections on exam you can answer with confidence
I don't even know anything about biostats, but even I learned something from this video. Great work! Makes me want to change my major to stats
Nice... Thanks for commenting Phyllis
I'm currently studying for boards, and this video just saved me from the confusion of biostats! I've been so scared to study it all this time, cuz I've been traumatized by it in college, I never actually got this stuff till now. Thank you SO MUCH for doing this!
Sir you should be called Pathoma of Biostats haha , awesome job !
13:40 would A and B also be 100% sensitivity?
I have the same question!
I wrote a C# app based on the first question to review biostatistics (Haven't used it since finishing grad school in 2018). This was amazing, and your explanations are the best I have heard.
Abigail, Appreciate the comment. Glad it was helpful.
**** At 08:47 nice mnemonic which helped me alot
the more we go [N] egative(healthy) ------> higher se [N] sitivity -----> higher [N]PV
the more we go [P] ositive(disease) ------> higher s[P] ecificity -----> higher [P]PV
**** case-control =======> just say in your head "Case OR Control" to remember that it is related to OR=odd ratio
Nashaat, Thank you for sharing. You should make a video...