Citation
Appannah, Geeta and Haniff, Jamaiyah and Mohammad Nor, Noor Safiza and Wong, N. F. and Kee, Chee Cheong and Zainuddin, Ahmad Ali and Shahar, Suzana and Rasat, Rahmah and Khor, Geok Lin and Abd Talib, Ruzita and Chen, Won Sun and M., Rajaah and Yusoff, Ahmad Faudzi
(2008)
Reliability, technical error of measurements and validity of instruments for nutritional status assessment of adults in Malaysia.
Malaysian Journal of Nutrition, 14 (2).
S25-S26.
ISSN 1394-035X
Abstract
The Third National Health & Morbidity Survey, Malaysia 2006 included nutritional status
assessment of children. This study was to assess inter-and intra-examiner reliability, the technical
error of measurement (TEM) and the validity of instruments for measuring weight, length and waist circumference. A convenience sample of 130 adults working in a selected office setting who
fit the inclusion and exclusion criteria participated in the study. Two public health nurses, trained
to follow a standard protocol, obtained the measurements. Weight was measured using Tanita
digital weighing scale, 318, Japan (0.1 kg) and Seca Beam Scale, Germany (0.01 kg) weighing
machines. Height was measured using Seca Bodymeter 206 Germany (0.1cm) and Stadiometer,
Germany (0.1cm). Waist circumference was measured using Seca circumference tape, 206, Germany
(0.1 cm). By comparison the inter-examiner reliability in descending order would be weight,
height and lastly waist circumference. The intra-examiner reliability in descending order would
be weight and height followed by waist circumference. Height measurement on average using
test instrument reported that it was recording 0.4 cm higher than the reference instrument with
upper limit and lower limit at 2.5 and 1.6 cm respectively. The technical error of measurement and
coefficient of variation of weight and height for both inter-examiner and intra-examiner
measurements are all within acceptable limit (below 5%). The findings of this study supports that
weight, height and waist circumference measured in adults 30 years and above using Tanita
digital weighing scale, 318, Japan (0.1 kg), Seca Bodymeter 206 Germany (0.1cm) and Seca
circumference tape, 206, Germany (0.1 cm) are reliable and valid to be used in a community
survey. Limiting the number of examiners especially for waist circumference measurements would
yield higher degree of reliability and validity.
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