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Develepment and validation of a BIA prediction equation for 11-13 year old Sri Lankan girls

Show simple item record Samaranayake, D. Dabare, H. P. M. de Lanerolle-Dias, M. Waidyatilaka, I. Jayawardena, R. Hills, A. P. Wickremasinghe, A.R. Lanerolle, P. Wickramasinghe, V.P. 2019-02-05T09:54:54Z 2019-02-05T09:54:54Z 2018
dc.identifier.citation Proceedings of the Sri Lanka Medical Association, Anniversary Academic Sessions. 2018; 63(sup 1):132 en_US
dc.identifier.issn 0009875
dc.description Poster presentation Abstract (PP142), 131st Annual Scientific Sessions, Sri Lanka Medical Association, 26th-29th July 2018 Colombo, Sri Lanka en_US
dc.description.abstract INTRODUCTION AND OBJECTIVES: Population-specific measures of body composition are important in management of childhood obesity. This study aimed to develop and validate a bioelectrical impedance analysis (BIA) equation to assess total body water (TBW) and fat mass (FM) in Sri Lankan girls aged 11-13 years. METHODS: Forty-six 11-13 year-old healthy school girls were purposively selected and randomly divided into model development (n=30) and model validation (n=l6) sub-samples. Weight, height and impedance using BIA were measured. TBW was determined and FM was derived through the criterion Deuterium-dilution technique. Prediction equations for TBW and FM were developed using impedance index (heightvimpedance; cm2/Q), weight and height as independent variables. Final equations were developed combining the two sub-samples. Validity was assessed using correlation coefficients, paired-samples T-test and Bland-Altman plots. RESULTS: In the validation sample, predicted TBW and FM showed significant correlations and did not significantly differ from reference values, Final prediction equation for TBW had a R2 of 92.3% and RMSE of l.035 while FM prediction equation had a R2 of 94.3% and RMSE of 1.38. TBW predicted from new equation (19.48± 3.45kg) was not significantly different from reference TBW (19.52±3.65kg) and the two measures were significantly correlated (r=0.975, p<0.001). Similarly, predicted FM (10.41±4.39kg) was not significantly different from reference FM (10.38±4.74kg) and predicted and reference values were significantly correlated (r=0.974, p<0.001). In both prediction equations, the majority ofresiduals were within mean± l.96SD. CONCLUSION: Newly developed prediction equations for BIA assessment of TBW and FM show high validity compared to reference technique. en_US
dc.language.iso en en_US
dc.publisher Sri Lanka Medical Association en_US
dc.subject BIA prediction equation en_US
dc.title Develepment and validation of a BIA prediction equation for 11-13 year old Sri Lankan girls en_US
dc.type Conference abstract en_US

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