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Jabeen shah Jabeen shah Presentation Transcript

  • Development & Validation of a field-based tool for assessing body 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) • 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 View slide
  • Background • Anthropometry measure of growth predictor of health • Growth plasticity – ‘The thrifty phenotype hypothesis’ (Hales & Barker, 2001) • 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). View slide
  • The long and the short of it! •Shorter leg length & shorter leg length relative to height marker 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 height / height) x 100 • Leg length to height ratio (LLHR) = leg length/height
  • Study aim • To develop a valid and reliable sitting height measure for field use. • Should be lightweight and portable • Economical and relatively simple to construct.
  • Results so far… Regular calibration with 1m rule. Coefficient of variation Seca = 0.1 -1.8% Adapted LHM= 0.0 – 1.1%
  • +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.