Height Velocity in Apparently Healthy North Indian School Children

Aashima Dabas1, Rajesh Khadgawat1, Monita Gahlot2

  • 1Department of Endocrinology and Metabolism, All India Institute of Medical Sciences, New Delhi, India.

Insights

This study establishes normal height velocity (HV) data for North Indian children, crucial for assessing linear growth. Findings reveal peak height velocity (PHV) differences between sexes and a secular trend in achieving PHV.

Area of Science:

  • Pediatrics
  • Human Growth and Development
  • Anthropometry

Background:

  • Linear growth assessment relies on serial anthropometric data or height velocity (HV).
  • Normative data for growth velocity in North Indian children is lacking.
  • Establishing regional growth standards is essential for accurate pediatric assessment.

Purpose of the Study:

  • To establish normative height velocity (HV) data in apparently healthy North Indian children.
  • To provide updated growth velocity standards for pediatricians and researchers in the region.
  • To investigate the relationship between HV, puberty, and parental height.

Main Methods:

  • Prospective longitudinal study involving 7710 healthy children aged 3-17 years in Delhi.
  • Height measurements taken at baseline and 12 months.
  • Pubertal examination conducted on a subset of participants.

Main Results:

  • Data on HV and puberty available for 5635 and 1553 participants, respectively.
  • Mean peak height velocity (PHV) was 7.82 cm/year in boys (12-12.9 years) and 6.63 cm/year in girls (10-10.9 years).
  • HV correlated with parental height in prepubertal boys, girls, and pubertal boys.

Conclusions:

  • The study provides essential normative height velocity data for North Indian children.
  • A secular trend in achieving peak height velocity (PHV) was observed in both boys and girls.
  • These findings aid in the accurate monitoring of child growth and development.
Abstract

Related Concept Videos

Average Velocity01:12

Average Velocity

To calculate the other physical quantities in kinematics, we must introduce the time variable. The time variable allows us not only to state the position of the object during its motion, but also how fast it is moving. The speed at which an object is moving is given by the rate at which the position changes with time. For each position xi, we assign a particular time ti. If the details of the motion at each instant are not important, the rate is usually expressed as the average velocity. This...
23.7K
Instantaneous Velocity - II01:10

Instantaneous Velocity - II

Instantaneous velocity is the quantity that measures how fast an object is moving along its path. In other words, the instantaneous velocity of an object is the limit of the average velocity as the elapsed time approaches zero, or the derivative of displacement with respect to time. Like average velocity, the instantaneous velocity is a vector with the dimensions of length per unit time. Instantaneous velocity can have both positive and negative values. The instantaneous velocity can be...
13.2K
Escape Velocity01:26

Escape Velocity

The escape velocity of an object is defined as the minimum initial velocity that it requires to escape the surface of another object to which it is gravitationally bound and never to return. For example, what would be the minimum velocity at which a satellite should be launched from the Earth's surface such that it just escapes the Earth's gravitational field?
To calculate the escape velocity, it is assumed that no energy is lost to any frictional forces. In practice, a satellite...
8.4K
Velocity of an Object01:18

Velocity of an Object

Understanding how an object moves along a path requires distinguishing between motion over a time span and motion at a precise moment. A useful example is a vehicle traveling along a straight and level path, where its position at any given time is known. The initial step in analyzing this motion is to measure how far the vehicle travels over a fixed time period. This measurement, called average velocity, is computed by dividing the total change in position by the duration over which the change...
207
Velocity Potential01:20

Velocity Potential

In steady, incompressible flow through a long, straight pipe with a uniform cross-section, the flow in the central region (far from the pipe walls) is irrotational. This irrotational nature means that fluid particles do not rotate around their axes, and a scalar function called the velocity potential, represented by ϕ, can be used to describe their movement. In irrotational flows, the velocity field V is defined as the gradient of the velocity potential:
751
Drift Velocity01:19

Drift Velocity

The high speed of electrical signals results from the fact that the force between charges acts rapidly at a distance. Thus, when a free charge is forced into a wire, the incoming charge pushes other charges ahead due to the repulsive force between like charges. These moving charges move the charges farther down the line. The density of charge in a system cannot easily be increased, so the signal is passed on rapidly. The resulting electrical shock wave moves through the system at nearly the...
5.6K