What growth velocity SDS indicates GHD?

Growth velocity SDS below -2 over a 12-month observation period, especially combined with height SDS below -2 and bone age delay, is a key trigger for GH stimulation testing. Velocity SDS below -1.5 warrants re-measurement at 6 months.

How is growth velocity SDS calculated?

Growth velocity SDS = (observed velocity - mean velocity for age and sex) / SD for that age and sex, using reference data (e.g., Tanner-Whitehouse, British 1990 growth reference). Height measurements must be taken under standardized conditions with a calibrated stadiometer.

Growth Velocity SDS (Standard Deviation Score)

Calculate height velocity standard deviation score over a 6–12 month interval to identify growth faltering, growth hormone deficiency, or catch-up growth requiring endocrine evaluation.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.

How to Use

Enter the values for the scenario you are assessing. Calculate height velocity standard deviation score over a 6–12 month interval to identify growth faltering, growth hormone deficiency, or catch-up growth requiring endocrine evaluation. Use the growth velocity sds result to inform your calculation.

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