[Stature

[Betty Neyhart]

<div>The site is secure. </div><div></div><div> The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.</div><div></div><div></div><div>Objective: No adequate methods exist for predicting stature to help assess the growth of handicapped (including mobility-impaired) children or to help in developing indexes of obesity or equations for estimating basal energy expenditure for adults. In this project, equations were developed to predict stature in white and black adults and children from nationally representative samples for application to mobility-impaired and handicapped persons.</div><div></div><div></div><div></div><div></div><div></div><div>stature</div><div></div><div>Download: https://t.co/oRJIpLsyqp </div><div></div><div></div><div>Outcome measures: The NHES is the only national survey that contains body measurements biologically appropriate for predicting stature. These measurements include stature, sitting height, knee height, and buttocks to knee length.</div><div></div><div></div><div>Statistical analysis: Equations were computed from an all-possible-subsets of weighted regression procedure to select the predictor variables in the validation group based on the values of R2 and the root mean square error.</div><div></div><div></div><div>Results: Knee height predicted stature for white and black men, but the predictor variables for white and black women were knee height and age. For predicting stature in children 6 to 18 years of age, the predictor variable was knee height for all children.</div><div></div><div></div><div>Applications: The equations presented here were developed for use with mobility-impaired or handicapped persons, but the measurements were collected from ambulatory people by means of standard techniques. The use of recumbent anthropometric data from mobility-impaired or handicapped persons in the equations will expand the errors of prediction over those presented in this report. The standard error for a person is a guide to the range of probability within which a predicted value can occur.</div><div></div><div></div><div>The current reference curves of stature and weight for the UK were first published in 1966 and have been used ever since despite increasing concern that they may not adequately describe the growth of present day British children. Using current data from seven sources new reference curves have been estimated from birth to 20 years for children in 1990. The great majority of the data are nationally representative. The analysis used Cole's LMS method and has produced efficient estimates of the conventional centiles and gives a good fit to the data. These curves differ from the currently used curves at key ages for both stature and weight. In view of the concerns expressed about the current curves and the differences between them and the new curves, it is proposed that the curves presented here should be adopted as the new UK reference curves.</div><div></div><div></div><div>Children and adolescents whose heights and growth velocities deviate from the normal percentiles on standard growth charts present a special challenge to physicians. Height that is less than the 3rd percentile or greater than the 97th percentile is deemed short or tall stature, respectively. A growth velocity outside the 25th to 75th percentile range may be considered abnormal. Serial height measurements over time documented on a growth chart are key in identifying abnormal growth. Short or tall stature is usually caused by variants of a normal growth pattern, although some patients may have serious underlying pathologies. A comprehensive history and physical examination can help differentiate abnormal growth patterns from normal variants and identify specific dysmorphic features of genetic syndromes. History and physical examination findings should guide laboratory testing.</div><div></div><div></div><div>Primary care physicians play an important role in identifying children with abnormal growth. In most cases, short or tall stature is caused by variants of a normal growth pattern; however, serious underlying pathology is present in some patients. A comprehensive history and physical examination should be performed in all children with abnormal growth, and laboratory studies should be based on these findings.1</div><div></div><div></div><div></div><div></div><div></div><div></div><div>An important phenomenon, often called catch-up or catch-down growth, occurs in the first 18 months of life. In two thirds of children, the growth rate percentile shifts linearly until the child reaches his or her genetically determined growth channel or height percentile.3 Some children move up on the growth chart because they have tall parents, whereas others move down on the growth chart because they have short parents. By 18 to 24 months of age, most children's lengths have shifted to their genetically determined percentiles. Thereafter, growth typically proceeds along the same percentile until the onset of puberty (Table 1).</div><div></div><div></div><div>However, in children with certain conditions (e.g., growth hormone deficiency), normal birth weight and height may be followed by sustained growth deceleration starting at three to nine months of age. Beyond 24 months of age, children with constitutional delay of growth and puberty grow at a rate parallel to the 3rd percentile, whereas children with conditions such as growth hormone deficiency, Crohn's disease, and renal acidosis have a growth pattern that progressively falls further below the 3rd percentile or crosses percentiles.1</div><div></div><div></div><div>Accurate serial height measurements documented over time on a growth chart are key in the evaluation of children and serve as the foundation for the diagnosis of growth abnormalities. The desired tool to measure height accurately is a wall-mounted, well-calibrated ruler with an attached horizontal measuring bar fixed at 90 degrees (e.g., a stadiometer). The child should stand erect, with the back of the head, back, buttocks area, and heels touching the vertical bar of the stadiometer; the horizontal measuring bar is lowered to the child's head to obtain the measurement. Children younger than three years should be measured on a firm horizontal platform that contains three essential components: an attached yardstick, a fixed headplate, and a movable footplate. One adult should hold the child's feet steady while another adult obtains the measurement.4 Inaccurate height measurement may result in failure to detect growth disorders or inappropriate referrals for normally growing children.4</div><div></div><div></div><div>Plotting measurements on a growth chart (Figure 1) is essential for documenting and monitoring a child's longitudinal progression in size (i.e., the child's weight and height versus established normative data).5 When properly plotted, a growth chart provides a snapshot of a child's growth pattern over time. The Centers for Disease Control and Prevention's growth charts are available at</div><div></div><div></div><div>Children who are growing below the 3rd percentile or who cross percentiles after 24 months of age regardless of height should be evaluated. Although growth charts are designed to reflect continuous and steady growth in children, actual growth has been reported to occur in steps between stops and starts.6 Growth velocity varies with the seasons, accelerating in the spring and summer.7 Conventionally, growth progression over an extended period (e.g., six to 12 months) is more informative than that over a shorter period.4</div><div></div><div></div><div>In children two to three years of age, spurious growth deceleration may seem to occur if standing height is plotted on a supine chart because standing height is always shorter than supine length. Therefore, supine length should always be plotted on a supine chart (used in patients from birth to three years of age), and standing height plotted on a height chart (used in patients two to 20 years of age).8</div><div></div><div></div><div>In children born prematurely, height and weight adjusted for gestational age should be plotted in the first two years of life. This adjustment is calculated by subtracting the number of weeks premature the child was born from the child's current age (with 40 weeks' gestation being a full-term birth). For example, the length of a three-month-old infant born at 34 weeks' gestation should be plotted at the 1.5-month point (12 weeks of age, minus six weeks prematurity).</div><div></div><div></div><div>An accurate weight measurement should also be graphed. Malnutrition (the most common cause of poor growth in children) can be diagnosed in a child two years or younger whose weight for length is less than the 5th percentile or in a child older than two years whose body mass index (BMI) for age is less than the 5th percentile. A BMI for age greater than the 95th percentile is consistent with overweight, and a BMI for age between the 85th and 95th percentiles indicates a risk of becoming overweight.</div><div></div><div></div><div>Because adult stature is usually genetically determined,9 a child's adult height potential can be estimated by calculating the midparental height. The midparental height is a child's projected adult height based on the heights of the parents: in girls, the father's height minus 13 cm (5 in) is averaged with the mother's height; in boys, the mother's height plus 13 cm is averaged with the father's height (Table 2).</div><div></div><div></div><div>A rough estimate of the child's projected height, without taking skeletal maturation or pubertal tempo into account, can be determined by extrapolating the child's growth along his or her own height percentile to the corresponding 20-year point. If the estimated final height is within 5 cm (2 in) of the mid-parental height, the child's current height is appropriate for the family. However, if the projected height differs from the midparental height by more than 5 cm, a variant growth pattern or a pathologic cause should be considered.10 It is important to measure the parents' heights in the office, rather than use their reported height, to avoid over- or underestimation of midparental height.</div><div></div><div></div><div>The evaluation of upper-to-lower body segment ratios in children growing below the 3rd percentile for height helps differentiate skeletal dysplasia leading to disproportionate limb shortening from conditions that primarily affect the spine, such as scoliosis.11 The upper-to-lower body segment ratio can be determined by measuring the distance from the symphysis pubis to the floor (i.e., lower body segment) in a patient standing erect against a wall. The lower body segment is subtracted from the child's height to obtain the upper body segment value. The ratio is then derived by dividing the upper body segment value by the lower segment value. A more accurate way of determining the upper-to-lower body segment ratio is to measure the upper body segment (sitting height). The sitting height is subtracted from the patient's standing height to obtain the lower body segment value. Body proportions vary during childhood. The average upper-to-lower body segment ratio is 1.7 at birth and decreases to 1.0 at 10 years of age with leg growth.</div><div></div><div> 795a8134c1</div>