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  1. Kunasegaran K, Ismail AMH, Ramasamy S, Gnanou JV, Caszo BA, Chen PL
    PeerJ, 2023;11:e15744.
    PMID: 37637168 DOI: 10.7717/peerj.15744
    Mental fatigue has shown to be one of the root causes of decreased productivity and overall cognitive performance, by decreasing an individual's ability to inhibit responses, process information and concentrate. The effects of mental fatigue have led to occupational errors and motorway accidents. Early detection of mental fatigue can prevent the escalation of symptoms that may lead to chronic fatigue syndrome and other disorders. To date, in clinical settings, the assessment of mental fatigue and stress is done through self-reported questionnaires. The validity of these questionnaires is questionable, as they are highly subjective measurement tools and are not immune to response biases. This review examines the wider presence of mental fatigue in the general population and critically compares its various detection techniques (i.e., self-reporting questionnaires, heart rate variability, salivary cortisol levels, electroencephalogram, and saccadic eye movements). The ability of these detection tools to assess inhibition responses (which are sensitive enough to be manifested in a fatigue state) is specifically evaluated for a reliable marker in identifying mentally fatigued individuals. In laboratory settings, antisaccade tasks have been long used to assess inhibitory control and this technique can potentially serve as the most promising assessment tool to objectively detect mental fatigue. However, more studies need to be conducted in the future to validate and correlate this assessment with other existing measures of mental fatigue detection. This review is intended for, but not limited to, mental health professionals, digital health scientists, vision researchers, and behavioral scientists.
    Matched MeSH terms: Mental Fatigue/diagnosis
  2. Su AT, Xavier G, Kuan JW
    PLoS One, 2023;18(7):e0287999.
    PMID: 37406016 DOI: 10.1371/journal.pone.0287999
    This study aimed to measure the spectral power differences in the brain rhythms among a group of hospital doctors before and after an overnight on-call duty. Thirty-two healthy doctors who performed regular on-call duty in a tertiary hospital in Sarawak, Malaysia were voluntarily recruited into this study. All participants were interviewed to collect relevant background information, followed by a self-administered questionnaire using Chalder Fatigue Scale and electroencephalogram test before and after an overnight on-call duty. The average overnight sleep duration during the on-call period was 2.2 hours (p<0.001, significantly shorter than usual sleep duration) among the participants. The mean (SD) Chalder Fatigue Scale score of the participants were 10.8 (5.3) before on-call and 18.4 (6.6) after on-call (p-value < 0.001). The theta rhythm showed significant increase in spectral power globally after an overnight on-call duty, especially when measured at eye closure. In contrast, the alpha and beta rhythms showed reduction in spectral power, significantly at temporal region, at eye closure, following an overnight on-call duty. These effects are more statistically significant when we derived the respective relative theta, alpha, and beta values. The finding of this study could be useful for development of electroencephalogram screening tool to detect mental fatigue.
    Matched MeSH terms: Mental Fatigue/diagnosis
  3. Che Mood A, Justine M, Bukry SA, Mohan V
    Med J Malaysia, 2024 Mar;79(Suppl 1):1-7.
    PMID: 38555878
    INTRODUCTION: Knee osteoarthritis is most common among women with obesity. It may lead to physical inactivity that, in turn, causes fatigue or lack of physical enthusiasm to perform meaningful daily activities. Hence, this study aimed to examine whether pain level, obesity indices and functional performances are associated with fatigue severity in women with knee osteoarthritis (KOA).

    MATERIALS AND METHODS: This cross-sectional study recruited women referred to physiotherapy to manage OA. The measurements included fatigue severity (fatigue severity scale); pain level (numerical rating scale); obesity indices (body mass index, fat %, waist circumference); functional performances (upper limb strength, lower limb strength, mobility, exercise capacity and quality of life). A simple linear regression analysis was used to determine which independent variable may be associated with fatigue severity.

    RESULTS: Ninety-six women with unilateral KOA participated in this study (Mean age, 55.70, Standard Deviation, SD 6.90) years; Mean fatigue severity, 34.51, SD 14.03). The simple linear regression analysis showed that pain level (β=4.089, p<0.001), fat % (β=0.825, p<0.001) and QoL (β=0.304, p<0.001) were significantly associated with fatigue. After controlling for pain level, only fat % was significantly associated with fatigue (β=0.581, p=0.005).

    CONCLUSION: Pain level, fat %, and QoL appear to be associated with fatigue severity in women with KOA. In addition, pain symptoms may interact with factors associated with fatigue severity.

    Matched MeSH terms: Fatigue/diagnosis
  4. Adnan R, Van Oosterwijck J, Danneels L, Willems T, Meeus M, Crombez G, et al.
    J Back Musculoskelet Rehabil, 2020;33(6):919-930.
    PMID: 33016899 DOI: 10.3233/BMR-191548
    BACKGROUND: Differences in pain processing, muscle structure and function have been reported in patients with low back pain (LBP) with different grades of pain chronicity.

    OBJECTIVE: The present study aims to examine differences in psychological factors, disability and subjective fatigue between subgroups of LBP based on their chronification grade.

    METHODS: Twenty-one healthy controls (HC) and 54 LBP patients (categorized based on the grades of chronicity into recurrent LBP (RLBP), non-continuous chronic LBP (CLBP), or continuous (CLBP)) filled out a set of self-reporting questionnaires.

    RESULTS: The Hospital Anxiety and Depression Scale (HADS) and Multidimensional Pain Inventory (MPI) scores indicated that anxiety, pain severity, pain interference and affective distress were lower in HC and RLBP compared to non-continuous CLBP. Anxiety scores were higher in non-continuous CLBP compared to RLBP, continuous CLBP and HC. The Pain Catastrophizing Scale for Helplessness (PSCH) was higher in non-continuous CLBP compared to HC. The Survey of Pain Attitudes (SOPA) showed no differences in adaptive and maladaptive behaviors across the groups. The Pain Disability Index (PDI) measured a higher disability in both CLBP groups compared to HC. Moreover, the Rolland Morris Disability Questionnaire (RMDQ) showed higher levels of disability in continuous CLBP compared to non-continuous CLBP, RLBP and HC. The Checklist Individual Strength (CIS) revealed that patients with non-continuous CLBP were affected to a higher extent by severe fatigue compared to continuous CLBP, RLBP and HC (subjective fatigue, concentration and physical activity). For all tests, a significance level of 0.05 was used.

    CONCLUSIONS: RLBP patients are more disabled than HC, but have a tendency towards a general positive psychological state of mind. Non-continuous CLBP patients would most likely present a negative psychological mindset, become more disabled and have prolonged fatigue complaints. Finally, the continuous CLBP patients are characterized by more negative attitudes and believes on pain, enhanced disability and interference of pain in their daily lives.

    Matched MeSH terms: Fatigue/diagnosis*
  5. Lee HJ, Pok LSL, Ng CM, Yahya F, Sockalingam S, Tee YC, et al.
    Int J Rheum Dis, 2020 Aug;23(8):1088-1093.
    PMID: 32597545 DOI: 10.1111/1756-185X.13897
    INTRODUCTION: Fatigue is an important yet infrequently evaluated component in patients with rheumatoid arthritis (RA) and may have a major impact on quality of life.

    OBJECTIVES: To evaluate fatigue, identify factors associated with fatigue and assess the effect of fatigue on health-related quality of life (HRQoL) in a multi-ethnic cohort of RA patients.

    METHODS: A cross-sectional study was performed in patients who fulfilled European League Against Rheumatism/ American College of Rheumatology 2010 criteria for RA. Functional Assessment of Chronic Illness Therapy - Fatigue (FACIT-F) questionnaire was used to assess fatigue. Potential factors for fatigue were categorized into RA-related (gender, seropositivity [rheumatoid factor and/or anti-citrullinated protein antibody], disease duration, visual analog scale pain score, Disease Activity Score of 28 joints - erythrocyte sedimentation rate [DAS28-ESR], ESR, hemoglobin level, functional disability [Health Assessment Questionnaire - Disability Index, HAQ-DI score], EQ-5D-3L, concomitant prednisolone use and number of conventional synthetic disease-modifying anti-rheumatic drugs [csDMARDs] used) and non-RA-related (age, body mass index, ethnicity and number of co-morbidities).

    RESULTS: A total of 214 patients (86.9% female) were included; the median age was 62 (25-91) years and 67.3% were seropositive. Seventy-six (33.5%) patients had moderate disease activity, 12 (5.6%) had high disease activity and 152 (71%) patients had mild difficulties to moderate disability HAQ-DI scores. Median of total FACIT-F score was 113.2 (36.3-160.0). Joint factors of younger age, longer disease duration, higher HAQ score (increased functional disability), and lower EQ-5D (poorer HRQoL) were significantly associated with higher levels of fatigue (all P 

    Matched MeSH terms: Fatigue/diagnosis*
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