scholarly journals Low Back Pain Exacerbation Is Predictable Through Motif Identification in Center of Pressure Time Series Recorded During Dynamic Sitting

2021 ◽  
Vol 12 ◽  
Author(s):  
Ziheng Wang ◽  
Keizo Sato ◽  
Saida Salima Nawrin ◽  
Namareq Salah Widatalla ◽  
Yoshitaka Kimura ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Center Of Pressure ◽  
Pressure Sensors ◽  
Significant Risk ◽  
Office Workers ◽  
Low Back ◽  
Specificity And Sensitivity ◽  
Common Motif ◽  
Dynamic Sitting

Background: Low back pain (LBP) is a common health problem — sitting on a chair for a prolonged time is considered a significant risk factor. Furthermore, the level of LBP may vary at different times of the day. However, the role of the time-sequence property of sitting behavior in relation to LBP has not been considered. During the dynamic sitting, small changes, such as slight or big sways, have been identified. Therefore, it is possible to identify the motif consisting of such changes, which may be associated with the incidence, exacerbation, or improvement of LBP.Method: Office chairs installed with pressure sensors were provided to a total of 22 office workers (age = 43.4 ± 8.3 years) in Japan. Pressure sensors data were collected during working days and hours (from morning to evening). The participants were asked to answer subjective levels of pain including LBP. Center of pressure (COP) was calculated from the load level, the changes in COP were analyzed by applying the Toeplitz inverse covariance-based clustering (TICC) analysis, COP changes were categorized into several states. Based on the states, common motifs were identified as a recurring sitting behavior pattern combination of different states by motif-aware state assignment (MASA). Finally, the identified motif was tested as a feature to infer the changing levels of LBP within a day. Changes in the levels of LBP from morning to evening were categorized as exacerbated, did not change, or improved based on the survey questions. Here, we present a novel approach based on social spider algorithm (SSA) and probabilistic neural network (PNN) for the prediction of LBP. The specificity and sensitivity of the LBP inference were compared among ten different models, including SSA-PNN.Result: There exists a common motif, consisting of stable sitting and slight sway. When LBP level improved toward the evening, the frequency of motif appearance was higher than when LBP was exacerbated (p < 0.05) or the level did not change. The performance of the SSA-PNN optimization was better than that of the other algorithms. Accuracy, precision, recall, and F1-score were 59.20, 72.46, 40.94, and 63.24%, respectively.Conclusion: A lower frequency of a common motif of the COP dynamic changes characterized by stable sitting and slight sway was found to be associated with the exacerbation of LBP in the evening. LBP exacerbation is predictable by AI-based analysis of COP changes during the sitting behavior of the office workers.

Effect of a 12-week workplace interview intervention on physical activity and low back pain: a single-center, randomized controlled study

2020 ◽  
Author(s):  
Kazuhiro Shimo ◽  
Mami Hasegawa ◽  
Seiko Mizutani ◽  
Tomomi Hasegawa ◽  
Takahiro Ushida
Keyword(s):  
Physical Activity ◽  
Low Back Pain ◽  
Back Pain ◽  
Physical Therapist ◽  
Intervention Group ◽  
Office Workers ◽  
Controlled Study ◽  
Control Group ◽  
Low Back ◽  
Face To Face

Abstract Background Physical activity (PA) is essential in the management and rehabilitation of low back pain (LBP). However, it is not clear if workplace PA interventions can improve LBP. This study aimed to investigate the effects of workplace interview intervention on increasing PA and improving LBP among office workers. Methods We recruited 37 workers of a manufacturing company in Aichi, Japan. Participants were randomly assigned to the intervention group (n=20) or control group (n=17). We affixed waist-worn accelerometers to monitor PA in all participants, and provided face-to-face counseling with a physical therapist or nurse once a week for 12 weeks as workplace PA program to reassurance and encourage participants to keep high levels of PA. PA and LBP severity were assessed at baseline, 3 and 6 months. Results Baseline characteristics were similar in both groups, but PA was significantly higher in the intervention group than in the control group at 3 and 6 months. In the intervention group, was PA significantly increased at 3 and 6 months from baseline and LBP severity improved significantly at 6 months from baseline. We calculated the effect size of the interview intervention, and found that workplace interview intervention had a medium to large effect on PA and LBP severity. Conclusions Our data suggests that workplace PA intervention can increase PA and improve LBP among office workers. Trial registration UMIN-CTR Clinical Trial UMIN000038864 (https://upload.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000044321). Registered 12 December 2019, retrospectively registered.

scholarly journals Prevalence of low backache in practicing dentists of Eastern region of Nepal

2014 ◽  
Vol 1 (4) ◽  
pp. 29-32 ◽  
Author(s):  
S Shubham ◽  
RP Yadav
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Clinical Practice ◽  
Significant Risk ◽  
Eastern Region ◽  
Low Back ◽  
Medical Sciences ◽  
Cross Sectional ◽  
Pain Disability ◽  
Severe Back Pain

AIM: To analyze the prevalence of low backache among practicing dentists of Eastern Region of Nepal. METHODS: A descriptive cross-sectional, questionnaire based study was conducted among the practicing dentists of Eastern region of Nepal from April 2012 July 2012. A pre-tested, pre-calibrated self-administered verbal rating questionnaire "The Oswestry Low Back Pain Disability Questionnaire" was distributed to a random sample of 85 dentists from different parts of eastern region of Nepal through direct contact and e-mails. RESULTS: A total of 85 dentists were identified among which 76 dentists participated in the research. Research finding showed that the prevalence of back pain among practicing dentists in Eastern region of Nepal was 90.79% among which 50% (minimal), 36.84% (moderate) and3.95% (severe). Among 45 males 4.44% had no back pain, 53.33% had minimal, 37.77% had moderate and 4.44% had severe back pain. On contrary females (31 participants) showed lesser prevalence of low back pain with 16.12% no back pain, 45.16% minimal, 35.48% moderate and3.22% severe back pain. The participants were divided into 3 different age group intervals in which dentists between 25-30 years were 50 in which 8% had no back pain, 58% had minimal, 28% moderate and 6% had severe back pain. Between 31-35 years were 22 participants in which 50% had minimal, 50% moderate and 0% had severe low back pain. More than 35 years were 4 participants in which 75% had no back pain, 25 % had moderate. Similarly the participants were divided into 5 different groups according the years of clinical practice in dentists having 1- 2 years of clinical practice (37 participants) had 2.70% no back pain, 56.75% minimal, 35.13% moderate and 5.40% severe back pain. 16 participants had 3-4 years of clinical practice out of which 12.50% had no low back pain, 62.50% had minimal, 18.75% had moderate and 6.25% had severe back pain. 10 participants had 5-6 years of clinical practice out of which 10% had no low back pain, 50% had minimal and 40% had moderate. 9 participants had 7-8 years of clinical practice out of which 11.11% had no low back pain, 33.33% had minimal and 55.55% had moderate. 5 participants had >9 years of clinical practice out of which 75% had no low back pain, 25% had minimal and 25% had moderate. CONCLUSION: The prevalence of back pain among dental personnel in Eastern region of Nepal was relatively high. The significant risk factors associated with it might be poor posture. Innovations for preventive and, ergonomic strategies should be undertaken to reduce the low back pain. DOI: http://dx.doi.org/10.3126/jucms.v1i4.9570 Journal of Universal College of Medical Sciences (2013) Vol.1 No.04: 29-32

The Amount and Temporal Structure of Center of Pressure Fluctuations During Quiet Standing in Patients With Chronic Low Back Pain

Motor Control ◽  
2020 ◽  
Vol 24 (1) ◽  
pp. 91-112
Author(s):  
Fatemeh Azadinia ◽  
Ismail Ebrahimi-Takamjani ◽  
Mojtaba Kamyab ◽  
Morteza Asgari ◽  
Mohamad Parnianpour
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Chronic Low Back Pain ◽  
Healthy Subjects ◽  
Postural Sway ◽  
Center Of Pressure ◽  
Pressure Fluctuations ◽  
Quiet Standing ◽  
Low Back ◽  
Nonlinear Parameters

The characteristics of postural sway were assessed in quiet standing under three different postural task conditions in 14 patients with nonspecific chronic low back pain and 12 healthy subjects using linear and nonlinear center of pressure parameters. The linear parameters consisted of area, the mean total velocity, sway amplitude, the SD of velocity, and the phase plane portrait. The nonlinear parameters included the Lyapunov exponent, sample entropy, and the correlation dimension. The results showed that the amount of postural sway was higher in the patients with low back pain compared with the healthy subjects. Assessing the nonlinear parameters of the center of pressure showed a lower sample entropy and a higher correlation dimension in the patients with low back pain compared with the healthy subjects. The results of this study demonstrate the greater regularity and higher dimensionality of the center of pressure fluctuations in patients with nonspecific chronic low back pain, which suggests that these patients adopt different postural control strategies to maintain an upright stance.

scholarly journals Plantar Pressure Changes and Their Relationships with Low Back Pain during Pregnancy Using Instrumented Insoles

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Fernando Martínez-Martí ◽  
Olga Ocón-Hernández ◽  
María Sofía Martínez-García ◽  
Francisco Torres-Ruiz ◽  
Antonio Martínez-Olmos ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Plantar Pressure ◽  
Center Of Pressure ◽  
Low Cost ◽  
Low Back ◽  
Gait Parameters ◽  
Pregnancy And Postpartum ◽  
Pain Prevalence ◽  
Pressure Changes

Low back pain affects around 50% of pregnant women and presents significant morbidity and persistence for years in 20% of postpartum women who report that pain. Numerous studies have documented gait alterations during pregnancy and postpartum. Therefore, an analysis of the relationship between certain gait parameters and low back pain was attempted using low-cost validated instrumented insoles. This work presents a longitudinal cohort study carried out during routine gynecological follow-up visits in the first, second, and third trimesters of pregnancy at an Obstetrics and Gynecology Service. Sample size was 62. Plantar pressure data were collected with specially designed instrumented insoles containing four force sensors to measure peak pressure, center of pressure, and stance phase time in each foot and in each pregnancy trimester. The analysis was carried out on a two-dimensional level, simultaneously considering the data from both feet using Hotelling’s T2 test. This longitudinal study detected relationships between certain gait parameter changes and low back pain during pregnancy. It revealed a cyclic tendency of low back pain prevalence with a maximum in the second trimester and a decrease in the third trimester, which was correlated with alterations of the pregnant gait: excessive foot pronation and rearfoot pressure increase.

Postural balance in low back pain patients: Intra-session reliability of center of pressure on a portable force platform and of the one leg stand test

2011 ◽  
Vol 34 (2) ◽  
pp. 213-217 ◽  
Author(s):  
Thomas Maribo ◽  
Kristian Stengaard-Pedersen ◽  
Lone Donbæk Jensen ◽  
Niels Trolle Andersen ◽  
Berit Schiøttz-Christensen
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Postural Balance ◽  
Center Of Pressure ◽  
Force Platform ◽  
Low Back ◽  
Stand Test ◽  
The One ◽  
Pain Patients

scholarly journals Linear and Nonlinear Dynamic Methods towards Investigating Proprioception Impairment in Non-specific Low Back Pain Patients

2020 ◽  
Author(s):  
Seyed Mohammadreza Shokouhyan ◽  
Mehrdad Davoudi ◽  
Maryam Hoviattalab ◽  
Mohsen Abedi ◽  
Soha Bervis ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Lyapunov Exponents ◽  
Center Of Pressure ◽  
Cohort Analysis ◽  
Healthy People ◽  
Low Back ◽  
Muscle Area ◽  
Mean Velocity ◽  
Somatosensory Information

Central nervous system (CNS) uses vision, vestibular, and somatosensory information to maintain body stability. Research has shown that there is more lumbar proprioception error among low back pain (LBP) individuals as compared to healthy people. In this study, two groups of 20 healthy people and 20 non-specific low back pain participants (LBP) took part in this investigation. This investigation focused on somatosensory sensors and in order to alter proprioception, a vibrator (frequency of 70Hz, amplitude of 0.5 mm) was placed on the soleus muscle area of each leg and two vibrators were placed bilaterally across the lower back muscles. Individuals, whose vision was occluded, were placed on two surfaces (foam and rigid) on force plate, and trunk angles were recorded simultaneously. Tests were performed in 8 separate trials; the independent variables were vibration (4 levels) and surface (2 levels) for within subjects and 2 groups (healthy and LBP) for between subjects (4×2×2). MANOVA and multi-factor ANOVA tests were done. Linear parameters for center of pressure (COP) (deviation of amplitude, deviation of velocity, phase plane portrait (PPP), and overall mean velocity) and nonlinear parameters for COP and trunk angle ((recurrence quantification analysis) RQA and Lyapunov exponents) were chosen as dependent variables. Results indicated that NSLBP individuals relied more on ankle proprioception for postural stability. Similarly, RQA parameters for the COP on both sides and for the trunk sagittal angle indicated more repeated patterns of movement among the LBP cohort. Analysis of short and long Lyapunov exponents showed that people with LBP caused no use of all joints in their bodies (non-flexible), are less stable than healthy subjects.

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