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Related Concept Videos

Introduction to z Scores01:06

Introduction to z Scores

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A z score (or standardized value) is measured in units of the standard deviation. It tells you how many standard deviations the value x is above (to the right of) or below (to the left of) the mean, μ. Values of x that are larger than the mean have positive z scores, and values of x that are smaller than the mean have negative z scores. If x equals the mean, then x has a zero z score. It is important to note that the mean of the z scores is zero, and the standard deviation is one.
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Introduction to z Scores01:05

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A z score (or standardized value) is measured in units of the standard deviation. It indicates how many standard deviations the value x is above (to the right of) or below (to the left of) the mean, μ. Values of x that are larger than the mean have positive z scores, and values of x that are smaller than the mean have negative z scores. If x equals the mean, then x has a zero z score. It is important to note that the mean of the z scores is zero, and the standard deviation is one.
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z Scores and Area Under the Curve01:17

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z scores are the standardized values obtained after converting a normal distribution into a standard normal distribution. A z score is measured in units of the standard deviation. The z score tells you how many standard deviations the value x is above (to the right of) or below (to the left of) the mean, μ. Values of x that are larger than the mean have positive z scores, and values of x that are smaller than the mean have negative z scores. If x equals the mean, then x has a z score of...
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z Scores and Unusual Values01:07

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The z score is one of the three measures of relative standing. It describes the location of a value in a dataset relative to the mean. z scores are obtained after the standardization of the values in a dataset. The z score for the mean is 0.
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Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

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Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
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Measures of Central Tendency02:16

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The "center" of a data set is also a way of describing location. The two most widely used measures of the "center" of the data are the mean (average) and the median. The words "mean" and "average" are often used interchangeably. The substitution of one word for the other is common practice. The technical term is "arithmetic mean" and "average" is technically a center location. However, in practice among non-statisticians,...
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The Ladder Rung Walking Task: A Scoring System and its Practical Application.
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How Does SCORTEN Score?

Sarah Zavala1, Megan O'Mahony1, Cara Joyce1

  • 1Loyola University Medical Center Maywood, Illinois.

Journal of Burn Care & Research : Official Publication of the American Burn Association
|May 24, 2018
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The SCORTEN score

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Area of Science:

  • Dermatology
  • Critical Care Medicine
  • Clinical Epidemiology

Background:

  • Stevens Johnson syndrome/toxic epidermal necrolysis (SJS/TEN) are severe mucocutaneous reactions.
  • The SCORTEN score was developed to predict mortality in SJS/TEN patients.
  • Previous studies on SCORTEN's accuracy have yielded mixed results.

Purpose of the Study:

  • To compare predicted versus actual in-hospital mortality for SJS/TEN patients at a high-volume burn center.
  • To evaluate the SCORTEN score's predictive accuracy in this specific patient population.
  • To explore associations between SCORTEN components and patient outcomes.

Main Methods:

  • Retrospective study of adult and pediatric patients with biopsy-confirmed SJS/TEN admitted between February 2008 and February 2016.
  • SCORTEN scores calculated on days 1 and 3 of admission.
  • Analysis of predicted vs. actual mortality, length of stay, ICU stay, and complications.

Main Results:

  • 128 patients included; 17.2% mortality rate.
  • SCORTEN showed good discrimination (c-statistic = 0.83).
  • Model fit was unclear due to a nonsignificant standardized mortality ratio and borderline Hosmer-Lemeshow test.

Conclusions:

  • The accuracy of the SCORTEN model in predicting mortality for SJS/TEN patients treated in a burn center remains uncertain.
  • Further multicenter studies are needed to clarify SCORTEN's predictive ability.
  • Future research may involve reformulating or reweighting the SCORTEN score.