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Monthly growth status from a longitudinal study of Canadian infants
Insights
New reference data for infant growth, including weight, length, and head circumference, has been created for ages 1 to 18 months. This study provides valuable insights into healthy infant development milestones.
Area of Science:
- Pediatrics
- Human Growth and Development
- Biostatistics
Background:
- Accurate reference data is crucial for monitoring infant health and development.
- Existing growth charts may not fully capture the nuances of serial measurements in healthy term infants.
Purpose of the Study:
- To develop comprehensive reference data for infant weight, recumbent length, and head circumference.
- To provide monthly interval data from 1 to 18 months for healthy term infants.
- To utilize a mathematical model for robust data estimation.
Main Methods:
- Serial measurements of weight, recumbent length, and head circumference were collected from 351 healthy term infants.
- Data was gathered at 1-month intervals from 1 to 18 months.
- A 3-parameter mathematical model was fitted to individual infant data to estimate values.
Main Results:
- A robust dataset of infant growth parameters was established.
- The 3-parameter mathematical model demonstrated a good fit for the serial data.
- Reference data is available in both tabular and graphical formats for clinical use.
Conclusions:
- The developed reference data provides a reliable tool for assessing infant growth.
- This study contributes valuable longitudinal growth information for pediatricians and researchers.
- The mathematical modeling approach ensures accuracy and consistency in the reference data.
Abstract:
Reference data for weight, recumbent length and head circumference at 1-month intervals from 1 through 18 months have been developed from measurements of 351 healthy infants born at term in Montreal or Toronto. Each infant was measured serially from 1 to 18 months. A 3-parameter mathematical model was fitted to the serial data for each infant. The model fitted the serial data well for almost all the infants as evaluated by the residual mean square errors. Subsequently, values were estimated for each month of age from 1 through 18 months for each infant. These estimated values allowed the development of reference data that have been presented in tables and in graphs.