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

Regression Toward the Mean01:52

Regression Toward the Mean

6.5K
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...
6.5K
Testing a Claim about Standard Deviation01:19

Testing a Claim about Standard Deviation

2.5K
A complete procedure to test a claim about population standard deviation or population variance is explained here.
The hypothesis testing for the claim of population standard deviation (or variance) requires the data and samples to be random and unbiased. The population distribution also must be normal. There is no specific requirement on the sample size as the estimation is based on the chi-square distribution.
As a first step, the hypothesis (null and alternative) concerning the claim about...
2.5K
z Scores and Area Under the Curve01:17

z Scores and Area Under the Curve

11.4K
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...
11.4K
Normal Distribution01:11

Normal Distribution

12.6K
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...
12.6K

You might also read

Related Articles

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

Sort by
Same author

Hysterectomy trends in Israel between 2005 and 2021 - A nationwide cohort.

Maturitas·2026
Same author

From Survival to Recovery: 25 Years of Paediatric Critical Care Transformation in Israel.

Acta paediatrica (Oslo, Norway : 1992)·2026
Same author

Risk of Age-related and Disease-related Complications and Mortality in Elderly-onset Inflammatory Bowel Disease: A Population-based Study.

Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association·2025
Same author

Early childhood respiratory morbidity according to gestational age at birth: A nationwide cohort study.

Respiratory medicine·2024
Same author

Acute coronary syndrome rates by age and sex before and during the COVID-19 pandemic in Israel: nationwide study.

International journal of epidemiology·2024
Same author

National trends in pediatric drowning - insights from the Israeli Ministry of Health registry-based cohort.

European journal of pediatrics·2024

Related Experiment Video

Updated: Sep 22, 2025

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

27.3K

Improved method for revising the Israel birthweight references.

Lisa Rubin1, Ziona Haklai2, Shaul Dollberg3

  • 1School of Public Health, University of Haifa, Haifa, Israel.

Journal of Perinatal Medicine
|May 19, 2022
PubMed
Summary

This study established Israel-specific birthweight references by gestational age, finding differences in singleton and multiple births. Periodic updates are crucial for accurate fetal health assessment.

Keywords:
birthweightgestational agegrowth chartsreference values

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

17.7K
A Common Marmoset Model of Mother-Infant Intervention for Breastfeeding Disorders in the Presence of Paternal Inhibition and Maternal Neglect
05:04

A Common Marmoset Model of Mother-Infant Intervention for Breastfeeding Disorders in the Presence of Paternal Inhibition and Maternal Neglect

Published on: September 22, 2023

557

Related Experiment Videos

Last Updated: Sep 22, 2025

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

27.3K
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

17.7K
A Common Marmoset Model of Mother-Infant Intervention for Breastfeeding Disorders in the Presence of Paternal Inhibition and Maternal Neglect
05:04

A Common Marmoset Model of Mother-Infant Intervention for Breastfeeding Disorders in the Presence of Paternal Inhibition and Maternal Neglect

Published on: September 22, 2023

557

Area of Science:

  • Obstetrics and Gynecology
  • Neonatal Health
  • Public Health

Background:

  • Birthweight is a key indicator of fetal health and development.
  • Standardized birthweight charts are essential for clinical assessment, but population-specific data is needed due to variations in growth.
  • Categorizing infants as small or large for gestational age has significant clinical implications.

Purpose of the Study:

  • To establish a population-based reference for birthweight by gestational age in Israel.
  • To stratify these references by singleton/multiple births and gender.
  • To provide updated local data for accurate fetal growth assessment.

Main Methods:

  • Utilized data from the Ministry of Health Birth Registry (2010-2019).
  • Excluded implausible birthweight and gestational age values using visual mapping and interquartile range criteria.
  • Analyzed 1,689,696 live births, stratifying by singleton/multiple births and gender.

Main Results:

  • Mean birthweight for singletons (3251g) was significantly higher than for multiples (2304g).
  • Birthweight differences between singletons and multiples emerged around 30-31 weeks of gestation.
  • Singleton birthweight increase plateaued after 42 weeks, with lower weights for those born after 43 weeks.

Conclusions:

  • Improved data validation allowed analysis of 96% of births, enhancing reference accuracy.
  • The study identified shifts in the distribution of lower and higher birthweight percentiles compared to previous references.
  • Regular updates of national growth curves are vital for reflecting current population data and ensuring clinical relevance.