Understanding the New NBME Score Report (2024)

Understanding the New NBME Score Reports for USMLE Step 1 and 2 Preparation

So you just finished an NBME practice exam and the score report pops up. Most students immediately focus on the big score reported at the top. However, there is a wealth of information you can glean from these lengthy new score reports! The NBME revamped its score reports for CBSSA and CCSSA exams in 2022. Here we will dissect the anatomy of a full NBME score report.

The Different NBME Exams

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Before we get started, it is helpful to clarify the names of the different NBME exams and align them with their corresponding USMLE exam so you can ensure you are taking the correct practice tests.

Comprehensive Basic Science Self-Assessments (CBSSAs) are for USMLE Step 1 preparation. These score reports were updated in 2022 to be more holistic in the setting of USMLE step 1 converting to pass/fail reporting starting in January 2022.

Comprehensive Clinical Science Self-Assessments (CCSSAs) are for USMLE Step 2 CK preparation. These score reports were also updated in 2022.

Comprehensive Clinical Medicine Self-Assessments (CCMSAs) are for USMLE Step 3 preparation.

Clinical Mastery Series are for subject exam preparation.

Breaking Down the Score Reports

I order to follow along with this breakdown, it would be helpful to look at the NBME interactive example score reports. The interactive CBSSA report can be seen here, and the CCSSA report here.

The Score at the Top

For CBSSA/USMLE Step 1: the equated percent correct score.

At the top of your score report for CBSSA, instead of finding a 3-digit score you will a total equated percent correct score: #%. Per the NBME, this number reflects the percentage of how much of the content assessed by the CBSSA you have mastered. It may slightly differ from your actual percent correct. It could be slightly lower or higher to account for variations in the difficulty of different CBSSA forms.

For CCSSA/USMLE Step 2 CK: three-digit score

At the top of your score report for CCSSA, you will see the standard 3-digit score corresponding to the USMLE Step 2 CK score scale.

Probability of Passing the USMLE Examon the NBME Score Report

Following this, there is an estimated probability of passing the USMLE Step exam if taken within a week. This calculation considers test takers who took their Step exam for the first time within a week! The NBME chose 1 week because they intend these scores to be reflective of if you were to sit for the test within that week without forgetting or learning much new information.

Interpreting the Histogram

You’ll next see the histogram. This graphic will show you many important pieces of data. Your equated percent correct score is shown and is encapsulated by the two green bars next to it. These represent your likely score range. The gray bars show the low pass range for the Step exam. The light blue bars show students’ performance from LCME-accredited medical schools so you can compare your performance to theirs.

If your likely score range (the green range) is below or overlapping with the gray low pass range, you may be at risk of not passing the Step exam if you sit within the week. You would likely benefit from additional study time. If the green likely score range is entirely above the Step exam low pass range, it is more likely that you will pass the Step exam. However, this is not a guarantee! It is important to remember that multiple factors go into performance on test day and the limitations of the NBME’s modeling.

Performance by Content Area

On the following pages, you will see several tables depicting your overall performance broken down by physician tasks, disciplines, and systems. You will again see a different equated percent correct score for each of these areas.

Just like your overall equated percent correct score, this indicates the percent of content in each area you have mastered! You will then see a comparison group equated percent correct score taken from first-time Step test takers from LCME-accredited medical schools. The score comparison will show you if you scored about the same, lower, or higher than the comparison group.

Longitudinal Progress

The final pages display graphs of your scores over time for multiple tests, illustrating your longitudinal progress. This is a great way to visually track your progress!

How to Use the NBME Score Report to Your Advantage

After reading through your score report, you now can be laser-focused and direct your studying! You should tailor your studying to incorporate the weaker areas. Start by identifying any areas where you are scoring below the comparison group and start doing question blocks from your Qbank in these areas.

If you are scoring similar to or above the comparison group, great job! You should compare all your areas and choose the weakest ones for your performance or flip to the longitudinal graphs and focus on the systems where you are seeing a plateau in performance and not a rise. Embrace this challenge for maximum growth and improved scores! See our study calendars to help you stay focused throughout this time!

Finally, if you are unsure where to start, a tutor can help break down your score report with you and help you create a custom study plan for success! Schedule your complimentary consultation today to learn more.

Sources:

  1. https://www.nbme.org/examinees
Understanding the New NBME Score Report (2024)

FAQs

What is the 90% chance of passing the NBME? ›

The NBME also reports that there are a “few things to keep in mind”: A 90% probability of passing Step 1 still means there is a 10% likelihood of failing. A 90% probability of passing Step 1 does NOT mean you have mastered 90% of the content (the TEPCS represents what percentage of the content you have mastered)

What is the equated percent correct score on the NBME? ›

Your CBSSA equated percent correct score represents the percentage of the content that you have mastered. It has been sta s cally adjusted to account for slight varia ons in exam form difficulty and may be slightly lower or higher than the actual percentage of ques ons you answered correctly on this specific form.

What percentage is a NBME 25? ›

The passing score percentage for each of the Step 1 NBMEs is: CBSSA 25 – 64% correct (73 incorrect)

Does NBME underestimate score? ›

Second, note that the Step 2 CK NBMEs likely underpredict one's score. The lower range is 233, only three points below the predicted score. However, the upper bound is 261, 15 points higher than estimated.

What is considered passing on NBME? ›

Examination Feedback

NBME sets a standard of competence for the IFOM BSE that approximates the Step 1 passing standard. The IFOM BSE score that best approximates the Step 1 passing standard is 78.

What is a passing NBME shelf score? ›

Passing scores for NBME Shelf Exams can vary by school and subject. However, most schools set their passing standards around the national average, which is typically a score of 70 or higher. Achieving a score above this threshold is essential for success in your clinical years and beyond.

What is the national average for the NBME? ›

By comparing our data to the NBME national average of 70 with a standard deviation of 8, a z test was used to compare the population mean to our sample means.

How is NBME score calculated? ›

Subject Examination Scores

It is calculated as the percentage of items in the total content domain that would be answered correctly based on an examinee's proficiency level. The subject examination scores are equated across test administrations and are statistically adjusted for variations in test form difficulty.

Which NBME is most representative of Step 1? ›

Additionally, the newest NBME forms tend to be the most representative of current Step 1 content, so I would recommend taking NBME 31 towards the end of your preparation. However, all the CBSSAs that are currently available as well as the UWSAs should be helpful predictors of your performance.

What is the NBME scaled score? ›

Scaled scores are computed to have a mean of 70 and a standard deviation of 8 for the your defined scaling group. The scale provides a useful tool for comparing the scores of students to one another as well as identifying the relative strengths and weaknesses within the content areas defined for the exam.

Are shelf scores curved? ›

If you score well on your shelf exams, it can be a nice complement to your OSCE or NAC OSCE when readying your applications to residencies. The exam is graded on a national average, curved to a mean of 70 with a standard deviation of 8, so it is not an easy task to ace this exam.

Is NBME 25 tough? ›

I took NBME 25 today and my score dipped to 74%, although it seemed much harder than NBME 30. I did some digging and the med student consensus is that all of the NBME's underpredict (especially NBME 25 -- which appears to be the hardest), but I'm not too sure how relevant this sentiment is to the CBSE.

Is NBME 18 still predictive? ›

In our experience, since the new NBMEs were introduced, NBME form 18 has been the most predictive of students' scores on test day. (Of the retired NBMEs, form 16 was the most predictive.)

How is NBME graded? ›

For each content area, examinees receive their EPC score, the average estimated score of a recent cohort of Step 1 first-takers from LCME-accredited medical schools, an indicator of how their performance compared to that group (statistically lower, about the same, or higher), and the percentage of items in the content ...

What is the 95 chance of passing Step 1? ›

So according to the stats, how hard is it to pass Step 1? Let's look at some objective data. According to USMLE, the Step 1 pass rates for first time MD degree examinees in 2020 and 2021 were 97% and 95%, respectively. Of note is that Step 1 was still scored during those time periods.

What is the national average for the NBME shelf exam? ›

How do you interpret a shelf exam score? The NBME shelf exams were originally scaled to a mean of 70 and a standard deviation of 8. Keep in mind, this is not recalculated every year. The actual average in a given year has tended to creep up and is usually somewhere in the low-to-mid 70s.

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