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. 2012 Feb;25(1):25-30.
doi: 10.1016/j.apnr.2010.06.001. Epub 2010 Jul 24.

The validity of self-report weight and height as a surrogate method for direct measurement

Yolanda M Powell-Young  1
Affiliations

The validity of self-report weight and height as a surrogate method for direct measurement

Yolanda M Powell-Young. Appl Nurs Res. 2012 Feb.

Abstract

Bland-Altman analysis used to determine the extent of bias, agreement, and precision between self-report and the "gold standard" of actual weight and height measurement revealed significant discrepancies between methods. Use of self-report data by health care providers and researchers should be made based on the clinical situation, patient safety, and research goals.

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Figures

Figure 1
Figure 1. Scatter diagram with the line of equality for weight and height indices
XY scatterplot comparing self-report weight and height with actual weight and height measurements for all (N = 264) participants. Plot provides a visual demonstration of reproducibility between measurement methods. Identify line represents perfect agreement for data.
Figure 2
Figure 2. Bland-Altman plots for weight, height and BMI
Figures 2A–2C. Bland-Altman diagrams for comparison of self-report and actual weight, height and BMI values for all (N = 264) participants. Plotted is the difference between the two methods against their means (bias) with limits of agreement ± 1.96 standard deviations (precision).
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