Leg length and sitting height reference data and charts for children in the United States

Area of Science:

• Pediatrics
• Anthropometry
• Public Health

Background:

• Accurate interpretation of child growth relies on population-specific reference data.
• Sitting height and leg length are key indicators of body proportion and growth disorders.
• Previous studies provided sitting height to standing height ratios, but not separate charts for key demographic groups.

Purpose of the Study:

• To develop and present separate reference charts for sitting height and leg length.
• To provide these charts for diverse pediatric populations in the United States: Non-Hispanic Black, Non-Hispanic White, and Mexican-American children.
• To offer mean, standard deviation (SD), and LMS data to facilitate clinical application.

Main Methods:

• Utilized data from the National Health and Nutrition Examination Survey III (NHANES III), collected between 1988 and 1994.
• Analyzed sitting height and standing height measurements from a representative sample of US children.
• Developed age- and sex-specific reference charts for sitting height and leg length for distinct ethnic groups.

Main Results:

• Established distinct reference charts for sitting height and leg length tailored to Non-Hispanic Black, Non-Hispanic White, and Mexican-American children.
• Provided comprehensive statistical data, including mean (SD) and LMS parameters, for each reference chart.
• These charts enable more precise assessment of proportionality in children from these specific populations.

Conclusions:

• The newly developed reference charts offer crucial tools for pediatricians and healthcare providers.
• These charts support accurate evaluation of growth and proportionality in diverse US child populations.
• Availability of these specific charts enhances clinical care for children with potential growth abnormalities.