RESUMO
Serial data from studies of infants at the University of Iowa and from the Fels Longitudinal Study were used to develop sex-specific percentiles for increments in weight and recumbent length for selected intervals during the first 24 months of life. Weight increments are presented for 1-month intervals from birth to 6 months, 2-month intervals from birth to 12 months, and 3-month intervals from birth to 24 months. Length increments are presented for 2-month intervals from birth to 6 months, and for 3-month intervals from birth to 24 months of age. Weights and lengths at the target ages were obtained for the Iowa data by simple interpolation, and for the Fels data by fitting families of three-parameter mathematical functions to the serial data from ages 1 to 24 months. The tabular presentations are based on the Iowa data from birth to 3 months of age, on the combined Iowa and Fels data from 3 to 6 months of age, and on the Fels data from 6 to 24 months of age. We believe that these reference data will be useful in screening for deviations from normal growth and may aid in early detection of failure to thrive or excessive weight gain during early life.
Assuntos
Estatura/fisiologia , Peso Corporal/fisiologia , Crescimento/fisiologia , Fatores Etários , Feminino , Humanos , Recém-Nascido , Masculino , Valores de ReferênciaRESUMO
Serial head circumference measurements in 462 participants in the Fels Longitudinal Study were used to develop reference data for ages 1 to 12 months. We used a three-parameter mathematical function to model the serial head circumference data for each individual and estimated head circumference at 1-month intervals. Reference data for selected percentiles of head circumference status and 1-month increments were calculated from the estimated head circumferences. These reference data are presented in tables and charts for use in testing hypotheses about group differences or to monitor changes within individuals.
Assuntos
Cabeça/crescimento & desenvolvimento , Cefalometria , Feminino , Humanos , Lactente , Estudos Longitudinais , Masculino , Matemática , Valores de Referência , Caracteres SexuaisAssuntos
Estatura , Crescimento , Adolescente , Adulto , Determinação da Idade pelo Esqueleto , Canadá , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Valores de Referência , Estados UnidosRESUMO
In the past 15 years 450 girls have been seen because of concern about tall stature: 168 of them have been treated with stilbestrol to control the growth rate. Of the latter group 87 have been followed after treatment for a sufficiently long time to be sure growth had ceased and to provide the data for this report. At the onset of treatment the following data (mean values) were recorded: chronologic age, 13.0 years; skeletal age, 13.2 years; height, 172.9 cm; estimated mature height 180.2 cm; and growth potential, 7.3 cm. At the end of treatment data of interest (mean values) were: reduction in final height, 3.5 cm; duration of therapy, 2.1 years; amount of stilbestrol given, 2.3 gm; age of last visit, 17.6 years. Side effects were minimal, though two girls developed parovarian cysts that required surgery during treatment. Not included in the series of 87, one additional girl was seen with a serous cystadenoma of the ovary, and one girl developed superficial venous thrombosis of the calf. Long-term follow-up has revealed no late complications. It is concluded that estrogen can reduce significantly the growth rate of almost all tall girls, but treatment must be carried out under very careful supervision, bearing in mind possible side effects.