TY - JOUR
T1 - Scaling left ventricular mass in adolescent boys aged 11-15 years
AU - Valente-dos-Santos, Joao
AU - Coelho-e-Silva, Manuel J.
AU - Ferraz, Antonio
AU - Castanheira, Joaquim
AU - Ronque, Enio R.
AU - Sherar, Lauren B.
AU - Elferink-Gemser, Marije T.
AU - Malina, Robert M.
PY - 2014
Y1 - 2014
N2 - Background: Normalizing left ventricular mass (LVM) for inter-individual variation in body size is a central issue in human biology. During the adolescent growth spurt, variability in body size descriptors needs to be interpreted in combination with biological maturation.Aim: To examine the contribution of biological maturation, stature, sitting height, body mass, fat-free mass (FFM) and fat mass (FM) to inter-individual variability in LVM in boys, using proportional allometric modelling.Subjects and methods: The cross-sectional sample included 110 boys of 11-15 years (12.9-1.0 years). Stature, sitting height, body mass, cardiac chamber dimensions and LVM were measured. Age at peak height velocity (APHV) was predicted and used as an indicator of biological maturation. Percentage fat was estimated from triceps and subscapular skinfolds; FM and FFM were derived.Results: Exponents for body size descriptors were k = 2.33 for stature, k = 2.18 for sitting height, k = 0.68 for body mass, k = 0.17 for FM and k = 0.80 for FFM (adjusted R-2 = 19-62%). The combination of body descriptors and APHV increased the explained variance in LVM (adjusted R-2 = 56-69%).Conclusion: Stature, FM and FFM are the best combination for normalizing LVM in adolescent boys; when body composition is not available, an indicator of biological maturity should be included with stature.
AB - Background: Normalizing left ventricular mass (LVM) for inter-individual variation in body size is a central issue in human biology. During the adolescent growth spurt, variability in body size descriptors needs to be interpreted in combination with biological maturation.Aim: To examine the contribution of biological maturation, stature, sitting height, body mass, fat-free mass (FFM) and fat mass (FM) to inter-individual variability in LVM in boys, using proportional allometric modelling.Subjects and methods: The cross-sectional sample included 110 boys of 11-15 years (12.9-1.0 years). Stature, sitting height, body mass, cardiac chamber dimensions and LVM were measured. Age at peak height velocity (APHV) was predicted and used as an indicator of biological maturation. Percentage fat was estimated from triceps and subscapular skinfolds; FM and FFM were derived.Results: Exponents for body size descriptors were k = 2.33 for stature, k = 2.18 for sitting height, k = 0.68 for body mass, k = 0.17 for FM and k = 0.80 for FFM (adjusted R-2 = 19-62%). The combination of body descriptors and APHV increased the explained variance in LVM (adjusted R-2 = 56-69%).Conclusion: Stature, FM and FFM are the best combination for normalizing LVM in adolescent boys; when body composition is not available, an indicator of biological maturity should be included with stature.
KW - Allometry
KW - echocardiography
KW - growth
KW - maturation
KW - youth
KW - BODY-SIZE
KW - CHILDREN
KW - FATNESS
KW - IMPACT
U2 - 10.3109/03014460.2013.866694
DO - 10.3109/03014460.2013.866694
M3 - Article
SN - 0301-4460
VL - 41
SP - 465
EP - 468
JO - Annals of human biology
JF - Annals of human biology
IS - 5
ER -