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ORIGINAL ARTICLE

Measuring body mass index (BMI) in nursing home residents: The usefulness of measurement of arm span

Pages 46-49 | Received 17 Jun 2007, Published online: 12 Jul 2009
 

Abstract

Objective. To study whether arm span can be used as substitute for measurement of height in nursing home patients for calculating body mass index (BMI). Design. Explanatory observational study. Setting. Assessment of 35 nursing home residents admitted to long-term stay in a nursing home. Main outcome measures. Correlation between measured height and arm span and of BMI based on both measures. Results. Measured height and arm span, and BMI calculated from either measure were significantly correlated, rs=0.75, p <0.001 and rs=0.89, p <0.001, respectively. The ratios of measured height and arm span and between BMIs based on height or arm span are close to 1, but the dispersion is rather large. Conclusion. Arm span is a reliable substitute for measurement of height in nursing home patients. In persons with severe height reduction, arm-span-based BMI is probably more accurate than conventional height-based BMI.

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