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Jabeen shah

LondonMet PGR Students
LondonMet PGR Students

This document summarizes the development and validation of a new field-based tool for measuring body proportionality among children. It was created by Jabeen Shah for a postgraduate research conference. The tool aims to provide a lightweight, portable, and inexpensive alternative to current laboratory measures of sitting height and leg length ratios, which are markers of obesity, diabetes, and cardiovascular disease risk. Initial results found the adapted measure to have high validity and reliability compared to standard measures, with a low coefficient of variation, suggesting it is suitable for use in field studies.

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Development & Validation of a field-based tool for assessing body proportionalitybody proportionality A presentation by Jabeen Shah for the 1st postgraduate research conference 12 November 2010
Obesity epidemic Last 25 years dramatic increase in obesity- 2008 17% boys & 15% girls classed as obese; ~ 30% overweight/obese(7-9) Major risk factor for type 2 diabetes mellitus (T2DM) and cardiovascular disease(1,3, 4-6)disease(1,3, 4-6) Tackling childhood obesity Government priority(7) SAs identified as high-risk group(1, 4- 6)
Background South Asians genetically predisposed to central obesity, insulin resistance & type 2 diabetes, & CVD. The nature vs nurture debate
Background Anthropometry measure of growth predictor of health Growth plasticity The thrifty phenotype hypothesis (Hales & Barker, 2001) Overweight & obesity Overweight & obesity - taller for age children (Baker et al., 2007; Buchan et al., 2007). - advanced sexual & skeletal maturity - shorter legs relative to height (Pliakas & McCarthy, 2010).
The long and the short of it! Shorter leg length & shorter leg length relative to height marker for CVD, type 2 diabetes, &for CVD, type 2 diabetes, & obesity (Asao et al.,2006; Bogin & Varela-Silva, 2010; Pliakas & McCarthy, 2010).
Measures of leg length Leg length= Standing height - Sitting height Sitting height ratio (SHR) = (sitting(SHR) = (sitting height / height) x 100 Leg length to height ratio (LLHR) = leg length/height
Jabeen shah
Jabeen shah
Study aim To develop a valid and reliable sitting height measure for field use. Should be lightweight and portable Economical and relatively simple to Economical and relatively simple to construct.
Jabeen shah
Regular calibration with 1m rule. Results so far 1m rule. Coefficient of variation Seca = 0.1 -1.8% Adapted LHM= 0.0 1.1%
Jabeen shah
+2sd= +1.53 -2sd= -0.53
Conclusion The results so far suggest that the adapted measure is a valid and reliable sitting height measure that is suitable for field use.field use.

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Jabeen shah

  • 1. Development & Validation of a field-based tool for assessing body proportionalitybody proportionality A presentation by Jabeen Shah for the 1st postgraduate research conference 12 November 2010
  • 2. Obesity epidemic Last 25 years dramatic increase in obesity- 2008 17% boys & 15% girls classed as obese; ~ 30% overweight/obese(7-9) Major risk factor for type 2 diabetes mellitus (T2DM) and cardiovascular disease(1,3, 4-6)disease(1,3, 4-6) Tackling childhood obesity Government priority(7) SAs identified as high-risk group(1, 4- 6)
  • 3. Background South Asians genetically predisposed to central obesity, insulin resistance & type 2 diabetes, & CVD. The nature vs nurture debate
  • 4. Background Anthropometry measure of growth predictor of health Growth plasticity The thrifty phenotype hypothesis (Hales & Barker, 2001) Overweight & obesity Overweight & obesity - taller for age children (Baker et al., 2007; Buchan et al., 2007). - advanced sexual & skeletal maturity - shorter legs relative to height (Pliakas & McCarthy, 2010).
  • 5. The long and the short of it! Shorter leg length & shorter leg length relative to height marker for CVD, type 2 diabetes, &for CVD, type 2 diabetes, & obesity (Asao et al.,2006; Bogin & Varela-Silva, 2010; Pliakas & McCarthy, 2010).
  • 6. Measures of leg length Leg length= Standing height - Sitting height Sitting height ratio (SHR) = (sitting(SHR) = (sitting height / height) x 100 Leg length to height ratio (LLHR) = leg length/height
  • 9. Study aim To develop a valid and reliable sitting height measure for field use. Should be lightweight and portable Economical and relatively simple to Economical and relatively simple to construct.
  • 11. Regular calibration with 1m rule. Results so far 1m rule. Coefficient of variation Seca = 0.1 -1.8% Adapted LHM= 0.0 1.1%
  • 14. Conclusion The results so far suggest that the adapted measure is a valid and reliable sitting height measure that is suitable for field use.field use.