A graph showing the range and averages over time for each measured motion was included based on age and sex. The authors also gave a detailed explanation of the statistical tools used and analysis conducted. Photos demonstrating the measurement techniques and patient positions were provided. Extension and rotations were measured from the prone position.
Measurements taken in the supine position included flexion, abduction (leg away from the midline), adduction (leg toward the midline), and rotations (internal and external). Measurements were taken in two positions lying down: supine (face up) and prone (face down). There were 252 children involved in the study (that’s 504 hips to measure). There were no leg injuries or other compromising health conditions. Hip measurements were taken of children who came to the hospital for treatment of a broken arm. The study was done at Children’s Hospital of Philadelphia (CHOP). Hence this study was done to determine what constitutes normal (versus abnormal) hip motion in normal, healthy children. Normative values means you can find a chart with the expected measurements for each of these areas based on age and sex (male and female).Īlthough we have some general guidelines for range-of-motion measurements in adults, normative values for children of varying ages are not available. Other measures of things like grip strength, height, weight, head circumference, and even IQ (intelligence quotient) have normative values. When it comes to treating hip problems in children, it would be helpful to know what is normal motion and what is not.
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