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. 2015 Aug 18;10(8):e0135933.
doi: 10.1371/journal.pone.0135933. eCollection 2015.

The Association between Parameters of Malnutrition and Diagnostic Measures of Sarcopenia in Geriatric Outpatients

Affiliations

The Association between Parameters of Malnutrition and Diagnostic Measures of Sarcopenia in Geriatric Outpatients

Esmee M Reijnierse et al. PLoS One. .

Abstract

Objectives: Diagnostic criteria for sarcopenia include measures of muscle mass, muscle strength and physical performance. Consensus on the definition of sarcopenia has not been reached yet. To improve insight into the most clinically valid definition of sarcopenia, this study aimed to compare the association between parameters of malnutrition, as a risk factor in sarcopenia, and diagnostic measures of sarcopenia in geriatric outpatients.

Material and methods: This study is based on data from a cross-sectional study conducted in a geriatric outpatient clinic including 185 geriatric outpatients (mean age 82 years). Parameters of malnutrition included risk of malnutrition (assessed by the Short Nutritional Assessment Questionnaire), loss of appetite, unintentional weight loss and underweight (body mass index <22 kg/m2). Diagnostic measures of sarcopenia included relative muscle mass (lean mass and appendicular lean mass [ALM] as percentages), absolute muscle mass (total lean mass and ALM/height2), handgrip strength and walking speed. All diagnostic measures of sarcopenia were standardized. Associations between parameters of malnutrition (independent variables) and diagnostic measures of sarcopenia (dependent variables) were analysed using multivariate linear regression models adjusted for age, body mass, fat mass and height in separate models.

Results: None of the parameters of malnutrition was consistently associated with diagnostic measures of sarcopenia. The strongest associations were found for both relative and absolute muscle mass; less stronger associations were found for muscle strength and physical performance. Underweight (p = <0.001) and unintentional weight loss (p = 0.031) were most strongly associated with higher lean mass percentage after adjusting for age. Loss of appetite (p = 0.003) and underweight (p = 0.021) were most strongly associated with lower total lean mass after adjusting for age and fat mass.

Conclusion: Parameters of malnutrition relate differently to diagnostic measures of sarcopenia in geriatric outpatients. The association between parameters of malnutrition and diagnostic measures of sarcopenia was strongest for both relative and absolute muscle mass, while less strong associations were found with muscle strength and physical performance.

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Conflict of interest statement

Competing Interests: The authors have declared that no competing interests exist.

Figures

Fig 1
Fig 1. The association between parameters of malnutrition and relative muscle mass, expressed as lean mass percentage.
Lean mass as percentage of body mass is presented as mean (SD) of gender-specific z-scores. Bars represent the difference of lean mass percentage between older persons with the presence of the parameter of malnutrition compared to older persons without the presence of the parameters. P values were calculated with multivariate linear regression analysis including adjustments for age (and body mass in the association with loss of appetite). * = p<0.05. ** = p<0.001.
Fig 2
Fig 2. The association between parameters of malnutrition and absolute muscle mass, expressed as total lean mass.
Total lean mass is presented as mean (SD) of gender-specific z-scores. Bars represent the difference of total lean mass between older persons with the presence of the parameter of malnutrition compared to older persons without the presence of the parameters. P values were calculated with multivariate linear regression analysis including adjustments for age (and fat mass and height in the association with loss of appetite and underweight). * = p<0.05. ** = p<0.001.

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