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Updated: Jun 17, 2026
Measuring the Strength of Mice
Published on: June 2, 2013
Validity of self-reported measures of decreased muscle strength in older adults
João Paulo Neves Mota1, Cristina Camargo Pereira1, Milara Barp1
1Universidade Federal de Goiás. Goiânia, Goiás, Brazil.
Objectives:
to analyze the validity of self-reported measures for screening decreased muscle strength in older adults.
Methods:
this cross-sectional study assessed muscle strength using the gold-standard Handgrip Strength (HGS) test and the application of four subjective measures: A = perceived reduction in strength; B = difficulty lifting 5 kg; C = low score on the SARC-F; and D = combination of measures A + B. Validity was determined through sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy, with a 95% confidence interval (95% CI).
Results:
a total of 18.7% of participants exhibited decreased muscle strength, while subjective measures showed a frequency variation between 74.2% and 35.5%. Measure A demonstrated the highest sensitivity, whereas Measure C exhibited the highest specificity. The accuracy of Measures A, B, C, and D was 61.5%, 41.2%, 34.8%, and 36.2%, respectively.
Conclusions:
self-reported measures demonstrated low accuracy; however, Measures A and C, due to their ease of application, could be used in combination.
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