In non-ambulatory persons, how should height be measured?

Measuring height accurately in non-ambulatory persons can be challenging, as traditional methods like standing height measurement are not feasible. Instead, arm span is a reliable alternative for this population. Arm span is considered an appropriate proxy for height because in most individuals, arm span is nearly equivalent to height. This method helps provide an estimate of overall body size and can be particularly beneficial in geriatric assessments where mobility limitations might prevent standard height measurements.

Using arm span offers a practical solution, as it can be measured while the individual remains in a supine position, without the need for them to stand. This is especially important in geriatric care settings, where many individuals may have conditions that limit mobility or the ability to stand safely.

The other methods mentioned, such as measuring while lying down, can be complicated to perform accurately and may not yield reliable or consistent results due to body positioning. Verbal reports can also introduce inaccuracies, as they rely on the individual's memory or estimates, which may not be reliable. Therefore, arm span provides a practical and scientifically validated method for height assessment in non-ambulatory individuals, making it the ideal choice in this context.