Lung function in Estonian children: effect of sitting height

Abstract

The present analysis formed part of the population study of Estonian school-children and was undertaken in order to examine the relationships between lung function variables, standing and sitting height. We measured forced vital capacity (FVC), forced expiratory volume in 1 s (FEV1), peak expiratory flow and forced expiratory flows when 50 and 75% of FVC had been exhaled, and anthropometric indices in 645 healthy schoolchildren, aged 6-18 years. The growth spurt in standing and sitting height occurred between the ages of 11 and 13 years in girls, and 13 and 15 years in boys. Growth spurts of lung parameters occurred during the same periods. FVC and FEV1 showed close correlations (r = 0.89-0.94) with all anthropometric parameters and age, whereas correlation coefficients for the flows were less close (r = 0.65-0.88). In boys, correlations between sitting height and lung function variables were greater than those with standing height. Using stepwise regression analysis, in boys sitting height was selected in all lung function parameters, and in girls sitting height was never selected. We conclude that there is a very close correlation between sitting height and lung function variables. The use of sitting height in parallel with standing height in predicted values for Estonian schoolchildren would make the values more exact.

First trimester maternal tobacco smoking habits and fetal growth

“…A further limitation was that we were not able to relate maternal smoking to fetal thoracic circumference which might be more closely related to fetal lung size. Sitting height and limb length are accurate predictors of lung function in children28 29 and are very similar dimensions to CRL and FL, respectively, so we believe that the fetal measurements made are relevant to fetal lung size. Fourth, we were not able to replicate the dose-response relationship for reported maternal smoking and birth size demonstrated in some10 30 31 but not all4 studies.…”

Perinatal Programming of Childhood Asthma: Early Fetal Size, Growth Trajectory during Infancy, and Childhood Asthma Outcomes

“…However, spirometry is positively correlated with anthropometric measurements in children including sitting height [49] (i.e., crown rump length) and limb length [50] (i.e., femur length) and therefore it is biologically plausible that fetal measurements are a valid index of respiratory function.…”

Measurement of cardiac output and pulmonary transit time for assessment of pulmonary vascular resistance in domestic piglets

“…Within the presented range, the correlation appears to be linear. The relationship between PVR, CO and PTT can be expressed in a simplified way as follows: where η is the viscosity, L the length of the pulmonary vasculature (Kivastik & Kingisepp, 1995; Müller et al 2000) and C a numeric constant.…”

“…where η is the viscosity, L the length of the pulmonary vasculature (Kivastik & Kingisepp, 1995;Müller et al 2000) and C a numeric constant.…”