Functional performance levels of strength and power needed for independence in 80-year-old individuals

Shimada, Mieko; Nomura, Yasuo; Kimura, Yasuo; Nakagawa, Naoki; Nagayama, Hiroshi; Tazawa, Mitsumasa; Satô, Tamotsu; Inaba, Daisuke; Yonemitsu, Masami; Yoshitake, Yutaka

doi:10.4236/ojepi.2012.23010

Cited by 5 publications

(6 citation statements)

References 31 publications

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“…If missing data existed, the missing data were obtained by interviews based on the questionnaires. Physical fitness measurements were carried out only for subjects who were sufficiently fit, based on electrocardiograms or a physician's interview [27].…”

Section: Variablesmentioning

confidence: 99%

Effects of self-assessed chewing ability, tooth loss and serum albumin on mortality in 80-year-old individuals: a 20-year follow-up study

et al. 2020

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Background: The association between dental status and mortality in community-dwelling older adults has been documented by several studies. The aim of this study was to analyze the contribution of self-assessed chewing ability, number of remaining teeth and serum albumin levels to mortality and the interactions between the three factors. Methods: A 20-year follow-up study was conducted with 666 subjects aged 80 years (from 1996 to 2017) who resided in the 8 areas served by one health center in Iwate Prefecture. Health checkups including physical fitness measurements were conducted at a meeting place or gymnasium. Medical interview and blood sampling were conducted by physician. Oral examination was examined by dentist. The number of remaining teeth, serum albumin levels, and self-assessed chewing ability were used as predictors of mortality. Results: Among the 608 subjects (233 men and 375 women) included in this study, only 12 subjects (1.97%) survived after 20 years of follow-up. For men, dental status and serum levels of albumin were significantly associated with mortality. The hazard ratios of self-assessed chewing ability calculated by item response theory analysis and the inability to chew at least one food adjusted for serum albumin and tooth conditions were statistically significant in men. When adjusted by health status evaluated by blood tests, self-assessed chewing ability was statistically significant in men. According to path analysis, self-assessed chewing ability and serum albumin independently affected mortality in men. Conclusion: Masticatory dysfunction may be an important risk factor for mortality in men, even though it was selfassessed. Retaining chewing ability might be a useful predictor of longevity in older male adults.

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Section: Variablesmentioning

confidence: 99%

Effects of self-assessed chewing ability, tooth loss and serum albumin on mortality in 80-year-old individuals: a 20-year follow-up study

et al. 2020

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“…In particular, reduced muscle power and elevated interlimb power asymmetry appear to be predictors of functional deficits while also indicating an increased risk of falls in frail elderly individuals. Furthermore, high levels of functional capacity have been positively associated with high quality of life and independent living in elderly subjects …”

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confidence: 99%

Physical function and muscle strength in sporadic inclusion body myositis

et al. 2017

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Introduction: In this study, self-reported physical function, functional capacity, and isolated muscle function were investigated in sporadic inclusion body myositis (sIBM) patients. Methods: The 36-item Short Form (SF-36) Health Survey and 2-min walk test (2MWT), timed up & go test (TUG), and 30-s chair stand performance were evaluated. In addition, patients were tested for knee extensor muscle strength (isokinetic dynamometer) and leg extension power (Nottingham power rig). Results: TUG performance was the strongest predictor of selfreported physical function (r 2 5 0.56, P < 0.05). Knee extension strength and between-limb strength asymmetry were the strongest multi-regression indicators of TUG performance (r 2 5 0.51, P < 0.05). Strength asymmetry showed the strongest single-factor (negative) association with 2MWT performance (r 2 5 0.49, P < 0.05). Discussion: TUG assessment appears to sensitively predict self-perceived physical function in sIBM patients. Notably, between-limb asymmetry in lower limb muscle strength had a substantial negative impact on motor tasks involving gait function.

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“…33 This critical value may represent individuals more affected by sarcopenia, and has notable similarity to our own threshold value.…”

Section: Discussionmentioning

confidence: 82%

Explanators of Sarcopenia in Individuals With Diabesity: A Cross-Sectional Analysis

Bittel

Tuttle

et al. 2017

Journal of Geriatric Physical Therapy

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Background and Purpose Excess lower extremity intermuscular adipose tissue (IMAT), reduced strength, and functional limitations are common in obese individuals with and without diabetes (the former termed diabesity). Individuals with diabesity are particularly susceptible to accelerated sarcopenia, which may be under-diagnosed. The purpose of this study was to determine critical values for leg IMAT volume, plantar flexor muscle strength, and physical performance that help identify individuals with diabesity who have sarcopenia. Methods 43 age- and sex-matched obese adults were studied; 12 with type 2 diabetes, 21 with diabetes and peripheral neuropathy, and 10 non-diabetic controls. Dual-energy x-ray absorptiometry (DXA)-derived skeletal muscle index determined classification of sarcopenia. Leg fat (%IMAT), ankle plantar flexor (PF) peak torque and power while ascending 10 steps were used as explanators of sarcopenia. Receiver operating curves (ROC) identified critical values for each explanator individually. Logistic regression models using all 3 explanators, and only PF torque and stair power, were also created. ROC analyses identified the predicted probability that maximized each model’s sensitivity and specificity. A leave one out cross validation was used to simulate the models’ performance in an independent sample. Results & Discussion 32 participants were sarcopenic, 11 were not. Critical values for individual explanators were: 21% IMAT, 68 Nm PF torque, and 441 watts of stair power. Predicted probabilities of .76 and .67 were chosen as the optimal cutoff probabilities for the model combining all 3 explanators, and the model combining PF torque and stair power respectively. The cross validation analysis produced an accuracy of 82.4%, using the cutoff probability of .5, and an accuracy of 76.5%, using the cutoff of .76. The area under the curve (AUC) for the cross validation ROC analysis was .82. Critical values of leg %IMAT, PF torque, and stair power can classify individuals with diabesity as sarcopenic. The results of the cross validation give us confidence that the sample used in this study was representative of the target population, and suggests models created from this sample may perform well in externally derived datasets Conclusion Clinicians may be able to use these critical values to select interventions that specifically target sarcopenia. Measures of %IMAT, PF torque, and stair power may offer a customized alternative to traditional sarcopenic classification systems, which may not be optimally suited to the common impairments among individuals with diabesity.

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Functional performance levels of strength and power needed for independence in 80-year-old individuals

Cited by 5 publications

References 31 publications

Effects of self-assessed chewing ability, tooth loss and serum albumin on mortality in 80-year-old individuals: a 20-year follow-up study

Effects of self-assessed chewing ability, tooth loss and serum albumin on mortality in 80-year-old individuals: a 20-year follow-up study

Physical function and muscle strength in sporadic inclusion body myositis

Explanators of Sarcopenia in Individuals With Diabesity: A Cross-Sectional Analysis

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