Introduction
Children mature at different rates. The Khamis–Roche method estimates likely adult height using age, height, weight, and mid-parental height. It’s non-invasive and widely used by pediatric and sport practitioners. This article explains why a prediction helps, what affects accuracy, and how to use results to support development — not define it.
Why Predict Adult Height?
Knowing maturity context prevents unfair comparisons between athletes the same age but at different biological stages. It highlights growth-spurt periods around PHV (Peak Height Velocity) when coordination dips and injury risk can rise. A shared view of growth helps parents and coaches set expectations and plan training sensibly.
What is Khamis–Roche?
Khamis–Roche estimates adult height from age, standing height, weight, and the average of parents’ heights (with sex adjustment). It is most informative from roughly ages 8–15, when patterns shift. No scans or X-rays are required, making it practical for home or club environments.
Accuracy & Error
Prediction error varies with maturity. It is typically largest around PHV, when growth is fastest, and narrows again as growth slows. As a guide, early estimates may be within ±4–6 cm, tightening to ±1–3 cm nearer adult height. Re-testing every 3–6 months improves trend quality and confidence.
Measure Well, Re-test Smart
Measure with shoes off, tall posture, heels against a wall, and a consistent time of day. Use the same tape or stadiometer where possible. Log results and re-test on a 3–6 month cadence to reduce noise and strengthen trends.
How to Use Results
Treat predictions as guideposts, not labels. Focus on multi-month trends rather than single points. Adjust training loads during rapid growth windows and share simple visuals from the report to align plans with coaches and clinicians.
Summary
Khamis–Roche offers a practical way to understand growth without medical imaging. Error bands change with maturity, so good measurement and regular re-tests matter. Use the insight to support confidence and decision-making — never to pigeonhole an athlete.