floriankrach/lms-zscore-app

standalone macOS and Windows application for Z-Score computation

WebApp

A web application for Z-Score computation with LEAD LMS reference values for body composition parameters (adults and children) is available at: https://floriankrach.github.io/pyscripts/zscore-app-pyscript/.

LMS-zscore-app

standalone macOS and Windows application for Z-Score computation with LEAD LMS reference values

Reference

The applications can be used to compute Z-scores of body composition parameters with the reference values for:

• adults published in:
  Article Title: Reference values of body composition parameters and visceral adipose tissue (VAT) by DXA in adults aged 18–81 years—results from the LEAD cohort
  DOI: 10.1038/s41430-020-0596-5, 2019EJCN0971
  Link: https://www.nature.com/articles/s41430-020-0596-5
  Citation: Ofenheimer, A., Breyer-Kohansal, R., Hartl, S. et al. Reference values of body composition parameters and visceral adipose tissue (VAT) by DXA in adults aged 18–81 years—results from the LEAD cohort. Eur J Clin Nutr (2020).

• children published in:
  Article Title: Reference charts for body composition parameters by dual‐energy X‐ray absorptiometry in European children and adolescents aged 6 to 18 years—Results from the Austrian LEAD (Lung, hEart , sociAl , boDy ) cohort
  Link: http://dx.doi.org/10.1111/ijpo.12695
  Citation: Ofenheimer, A, Breyer‐Kohansal, R, Hartl, S, et al. Reference charts for body composition parameters by dual‐energy X‐ray absorptiometry in European children and adolescents aged 6 to 18 years—Results from the Austrian LEAD (Lung, hEart , sociAl , boDy ) cohort. Pediatric Obesity. 2020;e12695. https://doi.org/10.1111/ijpo.12695

Installation

• donwload the ZIP file for your operating system from the following links:

  • MacOS. Requirements: MacOS 10.15.x or higher.
  • Windows. Requirements: Windows 10.

• unpack it

• the unpacked application can be used right away without additional installation

Usage

• provide all information:

  • birthdate and the day of the DXA measurement in following format: DD-MM-YY, e.g. for 1st of May 2001 write 01-05-2001
  • the sex: for male write 0, for female write 1
  • the value of the measurements that you have values for:
    FM android/gynoid, FM trunk/limbs and weight in kg
    height in cm
    VAT mass in g
    LMI, FMI, BMI and appendicular LMI in kg/m^2
    fitted BMI and fitted LMI in kg/m^3
    fitted FMI in kg/m^2.5
    fitted appendicular LMI (ALMI) in kg/m^3.5

• how to calculate the indices (FMI, LMI, BMI, appendicular LMI):

  • take the value of the total body lean mass/fat mass/body mass or the sum of the lean mass of the limbs in kg
  • divide it by the body height^2 (cm)

• if you want to compare the fitted indices:

  • divide it by height^exponent

Note: some of the variables are only available for children (aged < 18 years) and some only for adults (≥ 18 years).

Known Issues

• both operating systems:

  • it might take some minutes for the application to start
  • you migh have to aggree to open the application under system preferences

• MacOS:

  • an operating system of 10.15.x or higher should be used
  • using the operating system 10.14.x will cause the user to be logged out when starting the application

Citation

If you find these applications useful or if you use it for your own work, please cite the papers referenced above.

Further information

For further questions write an e-mail to [email protected].
The reference charts published in the articles, can be provided on request in a larger format.