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A new method for calculation of height centiles for preadolescent children
1Division of Community Health, United Medical and Dental Schools of Guy's, London.
Annals of Human Biology
|May 1, 1992
Summary
A novel calculation method for attained height centiles uses a variance-stabilizing transformation for improved accuracy. This approach simplifies standard error estimation and is applicable to smaller population subgroups, enhancing pediatric growth assessment.
Area of Science:
- Pediatric endocrinology
- Biostatistics
- Growth assessment
Background:
- Accurate calculation of attained height centiles is crucial for monitoring child growth.
- Existing methods often involve complex adjustments and smoothing, potentially introducing inaccuracies.
- Standard error estimation in previous methods can be imprecise.
Purpose of the Study:
- To propose a new, more accurate method for calculating cross-sectional attained height centiles.
- To simplify the estimation of standard errors for these centiles.
- To develop a method applicable to diverse population subgroups, including those with limited sample sizes.
Main Methods:
- Utilizes a variance-stabilizing transformation of the form log(a+b height) up to age 11 years.
- Applies antilogging to residuals of transformed height, creating a single Gaussian distribution.
- Enables direct calculation of centiles from this distribution.
Main Results:
- The proposed method provides a single Gaussian distribution for centile calculation.
- Standard errors of centiles can be estimated without imprecise smoothing adjustments.
- The transformation parameters (a and b) do not require precise estimation.
Conclusions:
- The new method offers a robust and accurate approach to calculating attained height centiles.
- It simplifies statistical analysis and improves reliability, especially for smaller cohorts.
- This method enhances the utility of growth monitoring in various pediatric populations.