Related Experiment Video

Updated: Feb 6, 2026

A Novel Method for Involving Women of Color at High Risk for Preterm Birth in Research Priority Setting
14:43

A Novel Method for Involving Women of Color at High Risk for Preterm Birth in Research Priority Setting

Published on: January 12, 2018

13.5K

Longitudinal BMI Growth Curves for Surviving Preterm NICU Infants Based on a Large US Sample

Adrienne L Williamson1,2, Josip Derado1,3, Bradley J Barney1,4

  • 1Departments of Statistics and Analytical Sciences and.

Pediatrics
|August 26, 2018
PubMed

Insights

New longitudinal Body Mass Index (BMI) growth charts for preterm infants (24-36 weeks gestational age) reveal actual growth patterns over time, differing from existing cross-sectional data.

Area of Science:

  • Neonatalogy
  • Pediatric Growth Monitoring
  • Biostatistics

Background:

  • Existing growth curves for preterm infants lack longitudinal Body Mass Index (BMI) data.
  • Current BMI curves rely on cross-sectional data from different infant cohorts at each gestational age (GA).

Purpose of the Study:

  • To develop longitudinal BMI growth curves for preterm infants.
  • To provide a more accurate representation of infant body proportionality changes over time.

Main Methods:

  • Calculated BMI for 68,693 preterm infants (24-36 weeks GA).
  • Created longitudinal median curves stratified by sex, GA, and birth BMI quintiles.
  • Validated curves for fit, classification, and normality of z-scores.

Main Results:

  • Developed two sets of longitudinal BMI growth charts.
  • Longitudinal curves accurately reflect growth patterns, showing differences from cross-sectional data, especially post-nadir.
  • Observed variations in growth by GA and sex.

Conclusions:

  • New longitudinal BMI curves offer insights into preterm infant body proportionality.
  • These charts provide clinicians with data on dynamic growth changes in premature infants.
Abstract

More Related Videos

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale19:15

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale

Published on: August 25, 2014

88.0K
Monitoring Neuronal Survival via Longitudinal Fluorescence Microscopy07:02

Monitoring Neuronal Survival via Longitudinal Fluorescence Microscopy

Published on: January 19, 2019

6.9K

Related Concept Videos

Survival Curves01:18

Survival Curves

Survival curves are graphical representations that depict the survival experience of a population over time, offering an intuitive way to track the proportion of individuals who remain event-free at each time point. These curves are widely used in fields such as medicine, public health, and reliability engineering to visualize and compare survival probabilities across different groups or conditions.
The Kaplan-Meier estimator is the most common method for constructing survival curves. This...
719
Bacterial Growth Curve01:28

Bacterial Growth Curve

The bacterial growth curve is a fundamental concept in microbiology that describes the dynamics of bacterial population growth in a closed system with controlled environmental conditions, such as temperature and nutrient availability. This curve is divided into four distinct phases: lag, log (exponential), stationary, and death phases, each reflecting a unique stage of bacterial adaptation and growth. During the lag phase, bacteria acclimate to their surroundings by synthesizing essential...
2.7K
Longitudinal Research02:20

Longitudinal Research

Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
13.3K
Acid-Base Titration Curves02:23

Acid-Base Titration Curves

A titration curve is a plot of some solution property versus the amount of added titrant. For acid-base titrations, solution pH is a useful property to monitor because it varies predictably with the solution composition and, therefore, may be used to monitor the titration’s progress and detect its endpoint. Acid-base titration can be performed with a strong acid and a strong base, a strong acid and a weak base, or a strong base and a weak acid.
For a titration carried out for 25.00 mL of...
141.5K
Longitudinal Studies01:26

Longitudinal Studies

Longitudinal studies are also widely used in other medical and social science fields. For instance, in cardiovascular research, they can monitor patients' health over decades to identify risk factors for heart disease, such as high cholesterol or smoking, and evaluate the long-term effectiveness of preventive measures. Similarly, in mental health studies, researchers might follow individuals from adolescence into adulthood to understand the development and progression of conditions like...
533
Survival Tree01:19

Survival Tree

Survival trees are a non-parametric method used in survival analysis to model the relationship between a set of covariates and the time until an event of interest occurs, often referred to as the "time-to-event" or "survival time." This method is particularly useful when dealing with censored data, where the event has not occurred for some individuals by the end of the study period, or when the exact time of the event is unknown.
 Building a Survival Tree
Constructing a...
433