Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Normal Distribution01:11

Normal Distribution

16.2K
The normal, a continuous distribution, is the most important of all the distributions. Its graph is a bell-shaped symmetrical curve, which is observed in almost all disciplines. Some of these include psychology, business, economics, the sciences, nursing, and, of course, mathematics. Some instructors may use the normal distribution to help determine students’ grades. Most IQ scores are normally distributed. Often real-estate prices fit a normal distribution. The normal distribution is...
16.2K
z Scores and Area Under the Curve01:17

z Scores and Area Under the Curve

18.0K
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...
18.0K
Drug Dosing: Obese Patients01:21

Drug Dosing: Obese Patients

175
In the United States, obesity is a prominent concern. It is linked to heightened mortality rates due to increased occurrences of conditions such as hypertension, atherosclerosis, coronary artery disease, and diabetes compared to nonobese individuals. A patient is classified as obese if their actual body weight surpasses the ideal or desirable body weight by 20%, based on Metropolitan Life Insurance Company data. Ideal body weights consider average weights and heights for males and females...
175
Regression Toward the Mean01:52

Regression Toward the Mean

6.8K
Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when...
6.8K
Estimating Population Mean with Known Standard Deviation01:16

Estimating Population Mean with Known Standard Deviation

9.5K
To construct a confidence interval for a single unknown population mean μ, where the population standard deviation is known, we need sample mean as an estimate for μ and we need the margin of error. Here, the margin of error (EBM) is called the error bound for a population mean (abbreviated EBM). The sample mean is the point estimate of the unknown population mean μ.
The confidence interval estimate will have the form as follows:
(point estimate - error bound, point estimate +...
9.5K
Estimating Population Mean with Unknown Standard Deviation01:22

Estimating Population Mean with Unknown Standard Deviation

8.7K
In practice, we rarely know the population standard deviation. In the past, when the sample size was large, this did not present a problem to statisticians. They used the sample standard deviation s as an estimate for σ and proceeded as before to calculate a confidence interval with close enough results. However, statisticians ran into problems when the sample size was small. A small sample size caused inaccuracies in the confidence interval.
William S. Gosset (1876–1937) of the...
8.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Efficacy of Low-Dose Intravenous Ketamine With Spinal Anesthesia for Postoperative Pain Control in Total Knee Arthroplasty: A Randomized Clinical Trial.

Pain research & management·2026
Same author

Translation, Cultural Adaptation, and Psychometric Validation of the Iranian Version of the Eating Behavior Assessment Questionnaire for Obesity (EBA-O) in Adults with Obesity and Overweight.

Nutrients·2026
Same author

Review: Enhancing resilience of Mediterranean food systems through insect-based biotransformation of agri-food side streams (black soldier fly and yellow mealworm).

Animal : an international journal of animal bioscience·2025
Same author

Are your kidneys OK? Detect early to protect kidney health.

Hong Kong medical journal = Xianggang yi xue za zhi·2025
Same author

Small-for-gestational age according to INTERGROWTH-21<sup>st</sup> fetal weight standard misses most pregnancies at risk of stillbirth identified by GROW.

Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology·2025
Same author

Echocardiographic classification of dogs with aortic stenosis: potential utility of a novel staging system.

Journal of veterinary cardiology : the official journal of the European Society of Veterinary Cardiology·2025

Related Experiment Video

Updated: Jan 3, 2026

Assessment of Child Anthropometry in a Large Epidemiologic Study
09:36

Assessment of Child Anthropometry in a Large Epidemiologic Study

Published on: February 2, 2017

27.6K

Customized birthweight standard for an Iranian population.

K Nasri1, S Hantoushzadeh2, O Hugh3

  • 1Department of Obstetrics and Gynecology, Arak University of Medical Sciences, Arak, Iran.

The Journal of Maternal-Fetal & Neonatal Medicine : the Official Journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians
|November 27, 2019
PubMed
Summary

This study developed a customized birthweight standard for Iran, identifying key maternal and paternal factors influencing fetal growth. This standard helps differentiate between constitutional and pathological small for gestational age infants, improving perinatal care.

Keywords:
Birthweightcustomized chartsfetal growth

More Related Videos

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
07:56

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts

Published on: January 29, 2018

18.1K
Author Spotlight: Advancements in 3D Optical Imaging for Comprehensive Body Composition Assessment in Modern Research
06:48

Author Spotlight: Advancements in 3D Optical Imaging for Comprehensive Body Composition Assessment in Modern Research

Published on: June 7, 2024

2.0K

Related Experiment Videos

Last Updated: Jan 3, 2026

Assessment of Child Anthropometry in a Large Epidemiologic Study
09:36

Assessment of Child Anthropometry in a Large Epidemiologic Study

Published on: February 2, 2017

27.6K
Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
07:56

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts

Published on: January 29, 2018

18.1K
Author Spotlight: Advancements in 3D Optical Imaging for Comprehensive Body Composition Assessment in Modern Research
06:48

Author Spotlight: Advancements in 3D Optical Imaging for Comprehensive Body Composition Assessment in Modern Research

Published on: June 7, 2024

2.0K

Area of Science:

  • Obstetrics and Gynecology
  • Perinatal Medicine
  • Public Health

Background:

  • Accurate birthweight standards are crucial for assessing fetal growth and identifying potential health risks.
  • Existing birthweight charts may not accurately reflect the diverse genetic and environmental factors present in specific populations.
  • A customized standard is needed for Iran to improve the interpretation of fetal growth parameters.

Purpose of the Study:

  • To establish a customized birthweight standard tailored to the Iranian population.
  • To identify significant physiological and pathological factors affecting birthweight in Iran.
  • To enhance the clinical distinction between constitutionally small and pathologically growth-restricted fetuses.

Main Methods:

  • Retrospective analysis of a pregnancy database from five Iranian hospitals.
  • Inclusion of 4994 term births with complete data (July 2013 - November 2014).
  • Application of backwards stepwise multiple regression to derive birthweight prediction coefficients.

Main Results:

  • Maternal height, pre-pregnancy weight, parity, and infant sex significantly influenced birthweight.
  • Paternal height and weight were identified as significant, albeit weaker, predictors.
  • Pathological factors including village housing, anemia, diabetes, and preeclampsia were associated with altered birthweights.

Conclusions:

  • The study confirmed known physiological predictors of birthweight and highlighted the significance of paternal factors in the Iranian context.
  • A country-specific birthweight standard can aid Iranian clinicians in better identifying fetuses at risk.
  • Improved identification of growth deviations can lead to reduced unnecessary interventions and better perinatal outcomes.