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Machine learning prediction of future peripheral neuropathy in type 2 diabetics with percussion entropy and body mass indices

Xiao Ming-Xia, Lu Chang-Hua, Ta Na, Wei Hai-Cheng, Haryadi Bagus, Wu Hsien-Tsai

Biocybernetics and Biomedical Engineering

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2021

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Vol. 41, no. 3

1140--1149

EN

This study was designed to evaluate the clinical applications of body mass index (BMI) and a percussion-entropy-based index (PEINEW) for predicting the development of diabetic peripheral neuropathy (DPN) in a group of type 2 diabetes mellitus (DM) patients. The study population comprised a sample of 90 subjects with diabetics (aged 37–86 years), who went through a blood test and photoplethysmography (PPG) measurement and were then followed for 5.5 years. Conventional parameters, including the small-scale multiscale entropy index (MEISS), pulse wave velocity with electrocardiogram located (PWVmean), and PEIoriginal, were computed and compared. A logistic regression model with PEINEW and a single categorical variable (BMI) showed a graded association between the diabetics, with a high BMI (i.e., ‘‘high” category) associated with a 12.53-fold greater risk of developing DPN relative to the diabetics with a low BMI (i.e., ‘‘low” category) (p = 0.001). The odds ratio for PEINEW was 0.893. The Kaplan-Meier survival analysis showed that the diabetic patients with BMI ＞ 30 had a significantly higher cumulative incidence of PN on follow-up than those with BMI [...] 30 (log-rank test, p < 0.001). These findings suggest that BMI and PEINEW are both important risk and protective factors for new-onset DPN from diabetes mellitus and, thus, BMI and percussion entropy calculation can provide valid information that may help to identify diabetics with a high BMI and a low PEINEW as being at increased risk of future DPN.

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The impact of obesity and age on the risk of falls in elderly women

Bobowik Patrycja, Wiszomirska Ida

Acta of Bioengineering and Biomechanics

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2021

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Vol. 23, no. 2

123--130

EN

Purpose: The aim of this study was to examine the effect of obesity and age on body balance disorders in women over 60, especially whether obesity increases the FR in older females and whether age and obesity affect the same stabilographic parameters when it comes to the FR. Methods: The study consisted of 56 inactive females aged 71.77 ± 7.43 (SD). They were divided into groups according to age and obesity. Results: Obesity separately affects FRI12-6, static indicators with eyes closed (OSI EC, APSI EC, MLSI EC), and age affects FRI12-6 and static indices with eyes open (OSI EO, APSI EO). After considering design factors (age and obesity), there were statistically significant differences in OSI EO ( p = 0.027), APSI EO (p = 0.034), FRI12-6 ( p = 0.0002) between obese and non-obese participants in the age groups. There were no statistical differences between non-obese old and obese-young participants ( p = 0.863). The interaction between obesity and age in the FR in static indices and in FRI12-6 ( p = 0.73047) was not significant. Conclusions: Age and obesity affect the stabilographic parameters individually, but there is no interaction effect between them. The presence of only one of the above risk factors may increase the FR. Obesity affects stability, while age depends on other factors. If older people are not obese or fit, involutional changes could be reversed. The type of obesity and the location of the fat tissue should be taken into account in FR assessment.

3

Constraints on variation of weight-shifting by foot during walking in adolescents with valgus alignment of hallux

Latour Ewa, Arlet Jarosław, Latour Marek, Dworak Lechosław B., Bohatyrewicz Andrzej

Acta of Bioengineering and Biomechanics

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2020

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Vol. 22, no. 3

95--104

EN

Purpose: Etiology of hallux valgus (HV) remains unclear and effective treatments and prophylaxis for this condition are lacking and conclusions of researches concerning HV are inconsistent. Recognition of the function-structure interrelation in foot at the early stage of valgus alignment of first metatarsophalangeus joint (1stMTPJ) would help explain the etiology of HV. Methods: The frequency of weight-shifting patterns during walking and the body mass index (BMI) were assessed relative to goniometric measurements of the 1stMTPJ angle in adolescents. Weight-shifting patterns were identified with a plantar pressure analysis, performed with the GaitlineMaxline Distance method. Results: As the 1stMTPJ angle widened, the frequency distributions of identified weight-shifting patterns became increasingly lopsided, due to the favoring or disfavoring of one pattern at the expense of the other. The two sexes showed opposite trends in the weight-shifting patterns that were favored/disfavored, relative to participants with a 0º 1stMTPJ angle. The clear predominance of a central-shift pattern, at the expense of a medial-shift, occurred with the largest (20º) 1stMTPJ angle among girls. Additionally, the BMI distributions associated with 1stMTPJ angle characteristics showed opposite trends between the sexes. Conclusions: Valgus alignment of 1stMTPJ among adolescents were associated with limitations in weight-shifting freedom of the foot during walking, that could be involved in maintaining balance. An 1stMTPJ angle of 20º, where distinct limitations were observed, might serve as a criterion of HV pathology.

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A study of the influence of some exploitation factors on the ATV stability

Kadikyanov G., Minkovska I., Staneva G.

Transport Problems

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2017

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T. 12, z. spec.

147--156

EN

An original survey among ATV riders concerning the conditions in which they lost stability is conducted. The coordinates of the center of gravity of the ATV by riders with different Body Mass Indexes are determined. A simulation program on base mechanic-mathematical model to study the ATV’s motion is used. In this base the critical sideslip velocities and critical lateral overturn velocities of ATV at various riders’ Body Mass Index, curve radius and grip coefficients were calculated. The results show that riders’ Body Mass Index strongly affects critical velocities because of different coordinates of center of gravity.

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Pacjent referencyjny w pracowni hemodynamiki : więcej (u)wagi

Pasieka E., Lewandowski J.

Inżynier i Fizyk Medyczny

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2014

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Vol. 3, nr 6

287--292

PL

W ochronie radiologicznej standard pacjenta referencyjnego stanowi kryterium odniesienia względemdawek promieniowania, jakich nie należy przekraczać w diagnostyce i leczeniu z użyciem promieniowania jonizującego. Celem badania była analiza porównawcza pomiędzy wartościami opisującymi wzrost i masę ciała pacjentów, którymwykonano angioplastykę wieńcową a standardem pacjenta referencyjnego płci żeńskiej i męskiej.

EN

In radiation protection the standard of reference man provides a benchmark with respect to radiation doses which should not be exceeded in the diagnosis and treatment with ionizing radiation. The aim of the study was a comparative analysis between the height and weight of patients who underwent coronary angioplasty was performed and the reference man.

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The Influence of Age on Aerobic Capacity and Health Indicators of Three Rescue Groups

Prieto J. A., Gonzalez V., Del Valle M., Nistal P.

International Journal of Occupational Safety and Ergonomics

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2013

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Vol. 19, No. 1

19--27

EN

The aim of this study was to determine the relationship between age, aerobic capacity (VO2 max) and other health indicators among 3 rescue groups. The type of training and the subjective perception of physical fitness obtained via the Assessment Questionnaire of Physical Fitness were also analysed. To obtain VO2 max, 37 firefighters, 22 lifeguards and 59 mine rescue workers had a treadmill test. Their body mass index and body fat percentage were also calculated. The results show a significant decline in VO2 max of the older participants, which affects the effectiveness of rescue work. Furthermore, the training of all groups was inconsistent and based on individual needs. Variable training and the decline in VO2 max with age affected the effectiveness of the rescue tasks of each group.