Given the prevalence and cost of low back pain, particularly among workers' compensation patients, it is advantageous to understand how various psychological constructs may be related to prolonged disability and failure to return to work. Malingering is a psychological construct that is clearly relevant for worker compensation populations and is a construct that is well suited for experimental control within an analog study. Malingering is the intentional exaggeration of physical or psychological symptoms that are motivated by external incentives such as time away from work. The ability to detect malingering in such a population with psychological assessments is unclear. An analog study was conducted in which we instructed college students to portray themselves as injured workers who received a back injury that required them to be off work while they recovered. Students were then told that they would be seeing a psychologist who would attempt to ascertain their abilities to return to work via the MMPI-2. Students were then randomly instructed to respond to the MMPI-2 in three different ways: a control condition was instructed to respond as if they suffered a workplace back injury that resulted in significant pain; a subtle fake-bad condition who received the control instruction plus were informed they did not enjoy their work and their back injury allowed them to enjoy personal and family time more; and a fake-bad condition that received the control instruction plus were asked to deliberately portray themselves as experiencing physical symptoms severe enough to keep them off work longer. Currently, no assessment of malingering exists within a compensated low back pain population. The purpose of this study was to determine if the MMPI-2 can be used to differentially identify "patients" who are instructed to report symptoms veridically versus "patients" instructed to consciously feign and magnify symptoms in an effort to avoid returning to work. Malingering and non-malingering patients' scores on the MMPI-2 validity and clinical scales were subjected to a cluster analysis to determine if a malingering profile could be accurately identified. A 5-cluster validity solution and 4-cluster clinical (both with K correction) solution were accepted. Substantially lower scores on L and K, elevated scores on F on the 5-cluster validity solutions, distinguished the "malingering" profile. The 4-cluster clinical solution was characterized by elevated scores on the clinical scales of hypochondriasis, depression, paranoia, and schizophrenia, which distinguished the "malingering" profile. The results indicate that the MMPI-2 could be useful in detecting malingering in compensated back pain patients. Results are discussed in the context of pain studies.

INTRODUCTION: Low back pain (LBP) is often exacerbated by movement and, during functional movements, people with LBP tend to inherently modify their posture and movement patterns to avoid aggravating their pain further. Therefore, analysis of spinal movement in people with LBP is necessary and may lead to the identification of movement-based clusters for optimal treatment. PURPOSE: The overall purpose of this study was to investigate how movement patterns in people with chronic LBP relate to their subjective level of pain-related disability. First, we determined which spinal movements best discriminate between people with chronic LBP and asymptomatic controls; second, we ascertained whether the level of movement dysfunction in people with chronic LBP correlates with the Oswestry Disability Index (ODI). METHODS: 44 volunteers (26 with current chronic LBP, 15 asymptomatic controls) participated in this study. An OPAL (APDM Wearable Technology) inertial measurement unit (IMU) sensor was attached to the skin over the spinal region of L3-L4, which allowed for transmission of motion data from the lumbar spine. Participants were instructed to perform a series of eleven uniplanar and functional multiplanar spinal movements at a comfortable pace. The median peak angular velocity values from the lumbar spine (measured by the gyroscope component of the IMU) were extracted from MATLAB and Python, and all statistical analyses were subsequently performed in RStudio. RESULTS: From a mixed-direction stepwise regression based on the minimization of the Aikake Information Criterion (AIC), a binomial logistic regression model containing kinematic data from Flexion, Extension-Twist, Axial Rotation, and Sit-to-Stand tasks was selected as the best model to predict chronic LBP status (McFadden’s pseudo-R-squared: 0.310). Moreover, compared to sagittal uniplanar tasks, functional multiplanar movements were better at predicting LBP status (AICmulti-uni = −3.2). Lastly, we found no association between the kinematic data from the movements that best predicted LBP status and ODI scores (p-value = 0.405). CONCLUSION: In this study, we found no correlation between self-reported disability and kinematic median peak angular velocity data from Flexion, Extension-Twist, Axial Rotation, and Sit-to-Stand tasks. Therefore, other factors that may modulate physical function, such as psychosocial factors, should be investigated.

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Magister Scientiae (Physiotherapy) - MSc(Physio) / Low back pain is one of the most frequent health problems and also one of the most prevalent musculoskeletal disorders. It’s the leading reason for activity limitation and job absenteeism which leads to huge economic burden on persons, society, industry and governments. Women are more susceptible to low back pain due to hormonal effects, differences in reporting of somatic symptoms and greater sensitization of pain. The aim of this study was to determine the impact of low back pain on activities of daily living and quality of life of adult women attending Moi Teaching and Referral Hospital (MTRH), Eldoret, Kenya. The following objectives were addressed, namely to determine pain intensity, functional disability and quality of life of adult women as well as to explore the activities of daily living that may contribute to low back pain. A sequential explanatory mixed method approach, comprising of a cross-sectional descriptive and explorative design for the quantitative and qualitative phases respectively, was employed in the study. A self-administered questionnaire consisting of four sections (socio-demographic information, the Nordic Musculoskeletal Questionnaire, the Oswestry Disability Index Questionnaire and World Health Organization Quality of Life Tool) was completed by two hundred and thirty-four adult women with a mean age of 38.54 years (SD=9.40). Twenty-six women participated in the focus group discussions. Results of the study indicate that 94.6% of the women had experienced low back pain in the past year while 90.1% had low back pain in the past seven days. In addition, more than half of the women (52.3%) experienced moderate pain intensity. Almost three quarters (68.1%) of the participants who experienced pain in the past year reported that low back pain prevented them from carrying out their activities of daily living. Half of the participants (50.2%) had moderate disability. A significant positive correlation was found between pain and disability (r = 0.426; p = 0.000) while a non-significant negative correlation was found between low back pain and quality of life (r = -0.058; p = 0.390). The qualitative results showed that women have difficulty in performing certain activities of daily living i.e. personal hygiene, sitting, standing and housework due to low back pain. A significant correlation was found between pain intensity, disability and quality of life. Such correlations advocate towards the bio-psychosocial model in management of low back pain. There is a need to invest in primary-based health care to include low back pain and its related risk factors, in order to advise the affected population on appropriate and essential prevention strategies. Future interventions should focus on enhancing physical health and psychosocial stress in women with low back pain.

ABSTRACT Specific Exercises as a Secondary Preventative Intervention Programme for Low Back Pain in 12-13 year old Children Gina Lucia Fanucchi Supervisors: Dr Ronél Jordaan, Prof Aimee Stewart Many recent large epidemiological studies have shown that the incidence of non-specific low back pain (LBP) in adolescents is very similar to that in adults, and that LBP in children is predictive of LBP in adults. As a result, it has been suggested that programmes targeting the prevention of LBP should be implemented early. However, there is currently very limited literature available on LBP preventative interventions during childhood. Therefore, this study aimed to determine the efficacy of an eight-week specific exercise programme in reducing self-reported episodes and intensity of LBP, as well as modifying some of the identified risk factors for LBP in children. A randomised control trial was used. Seventy-two 12-13 year old children, who had complained of LBP in the past three months, were included in the study. The intervention group completed an eight week school-based specific exercise programme, whilst the control group continued with normal school activity during this time. Data were collected at baseline, immediately post-intervention and at three months post-intervention, using a valid, reliable questionnaire and physical measurements. Treatment groups were compared with respect to change from baseline to postintervention, using an analysis of covariance (ANCOVA) with baseline values as covariates. Testing was done at the 0.05 level of significance. Significant improvements were observed in the exercise group for LBP prevalence (p=0.02), pain intensity VAS (3 months) (p<0.01) and VAS (1 month) (p=0.01), neural mobility (p<0.00001), hamstring flexibility (p<0.00001), iliopsoas flexibility (p<0.001) and lumbosacral position sense (p=0.01), immediately post-intervention, as well as three months post-intervention. Therefore, it can be concluded that specific exercises are beneficial in the prevention of LBP in 12-13 year old children. In addition, specific exercise programmes should be implemented early, ideally as an integral component of school physical education programmes.

A lombalgia, comum em muitas atividades profissionais acomete principalmente indivíduos que trabalham na condução de veículos motorizados. O objetivo deste estudo foi investigar a prevalência da lombalgia em motoristas de caminhão, bem como os fatores de risco relacionados à sua ocorrência. Para isso foi elaborado um questionário que abordou fatores como: idade, prática de atividade física e esportiva, hábitos gerais de saúde e questões relativas ao exercício profissional. Calculou-se também o índice de massa corpórea através da relação entre o peso corporal e o quadrado da estatura. Foram avaliados 489 caminhoneiros do sexo masculino e selecionados 410 para o estudo. Os resultados obtidos foram: a prevalência da lombalgia em 59% dos caminhoneiros; e dentre as variáveis estudadas apenas o número de horas de trabalho mostrou-se estatisticamente significante, sendo que o risco do caminhoneiro ter dor lombar aumenta 7% para cada hora de trabalho. / Low back pain is common in several kinds of professional activities mainly in people who drive a lot in their job. The aim of this study was to evaluate the prevalence of low back pain in truckers and the risk factors related to the occurrence of lumbar pain. For this, a questionnaire was elaborated including such as: age, physical and sports activities, general health habits and aspects related to the job. Besides, the index of corporal mass has been calculated, based on the relation between the truckers weight and his square height. 489 male truckers were evaluated and 410 have been selected for the study. The results showed that 59% of the truckers have suffered from low back pain, and among the different aspects which have been analysed, only the number of working hours has been more significant: for each working hour, the risk of truck driver in having lumbar pain increases 7%.

Les troubles musculo-squelettiques figurent parmi les principales causes d’arrêt de travail. Le mal de dos appelé aussi lombalgie est une des pathologies les plus fréquentes. La lombalgie est considérée aujourd’hui comme un véritable problème de santé publique. Les répercussions socio-économiques conséquentes résultent des lombalgies persistant plus de trois mois (lombalgies chroniques) qui affectent pourtant une minorité de sujets (moins de 10% des lombalgiques).Face aux coûts aussi importants de la lombalgie chronique et au regard du peu d’efficacité des traitements usuels, la recherche de prises en charge spécifiques se justifie. Aussi, l’objectif principal de ce travail est d’analyser les cinétiques de déconditionnement et de reconditionnement du rachis chez des sujets lombalgiques et, parallèlement, d’apprécier les effets d’un programme intensif et dynamique de restauration fonctionnelle du rachis sur différents profils de sujets lombalgiques (homme et femme, avec ou sans chirurgie, sédentaire ou actif, avec une douleur initiale élevée ou faible à modérée). Ce travail s’intéresse aux effets du temps, de l’entraînement ou du réentraînement et de facteurs spécifiques sur une population de sujets lombalgiques chroniques. Le reconditionnement des sujets lombalgiques chroniques est constaté à l’issue de 5 semaines de prise en charge (175 heures) dans un programme de restauration fonctionnelle du rachis (RFR). L’évaluation de ce type de programme confirme bien l’efficacité sur les plans physique, fonctionnel, psychologique et professionnel d’un programme multidisciplinaire dynamique et intensif de type RFR, proposé pour des sujets lombalgiques chroniques dont le niveau de déconditionnement est avancé mais stabilisé. Cette issue thérapeutique, bien que très coûteuse, conserve ses bénéfices jusqu’à 12 mois post-traitement et peut représenter une alternative intéressante à la chirurgie. La douleur intense prétraitement des sujets lombalgiques chroniques ne constitue ni un frein, ni une variable prédictive des réponses au programme. Des habitudes de vie physique active ou sportive sont recommandées chez les sujets lombalgiques chroniques souhaitant bénéficier d’une prise en charge RFR. / Musculoskeletal disorders are among the leading causes of sick leave or work injuries. Low back pain (LBP) is one of the most frequent disability and remains a public health issue. The consequent socioeconomic impact results from low backpain lasting more than three months (chronic low back pain) which nevertheless affects a minority of people (less than 10 % of the low back pain population). Seeing the importance of chronic low back pain costs and the poor efficiency of usual treatments, the research for specific care is justified. Thus, the main objective of this work is to analyze the kinetics of reconditioning and reconditioning of the spine in chronic low back pain patients and, at the same time, to appreciate the effects of an intensive and dynamic functional restoration program on various profiles of chronic low-back pain patients (male or female, with or without surgery, sedentary or active, with a high or a low to moderate initial pain). Thus, this work deals with the effects of time, of training or retraining and of specific factors on a chronic low-back pain population. The reconditioning of chronic low-back pain patients is noticed at the end of a fiveweek functional restoration program (175 hours). The assessment of this type of program indeed confirms the physical, functional, psychological and professional efficiency of a dynamic and intensive multidisciplinary program such as RFR program, proposed to chronic low back pain patients whose deconditioning level is advanced but stabilized. This therapeutic outcome, though very expensive, is still valid 12 months after the post-treatment and can represent an interesting alternative to the surgery. The pre-treatment of severe pain in chronic low back pain patients, does not constitute either an obstruction, or a predictive variable of the program performances. Having an active, physical and sporting life is recommended for chronic low back pain patients before treatment or to benefit from specific care.

Background: Non-specific low back pain is a growing problem in society. No treatment have shown satisfying results to reduce pain or disability for patients with non-specific low back pain, and 1-18% of these patients develop chronic low back pain. STarT Back Screening Tool (SBST) is an instrument for sub grouping patients with non-specific low back pain into low, medium or high risk of developing chronic low back pain and then modifying the treatment after the different needs of every patient. The purpose of this study was to do a systematic review, investigating validation of the SBST to evaluate the justification of its use by clinicians. Method: Pubmed, Cinahl and Medline was searched in February 2017 for studies investigating criterion validity, construct validity and content validity of the SBST. The author (JG) assessed risk of bias and extracted relevant data following the procedures of PRISMA-statement. Result: 15 articles were identified for inclusion in the review. 8 articles investigated criterion validity, 11 articles investigated construct validity and 1 article investigated content validity. Predictive validity showed heterogeneous statistical analysis and varying results, a narrative result was presented that showed marginal benefits for the use of SBST for prediction of future outcome. Concurrent validity was measured with Spearman’s rank correlation coefficient in all investigated articles, showing results between 0.34-0.802. Discriminant validity was measured with Area under the curve analysis in all articles, scoring between 0.69-0.92. Convergent validity showed a Pearson’s correlation between 0.708-0.811 and a Spearman’s rank correlation between 0.35-0.74. Conclusion: Because of heterogeneity of the results it is not possible to draw conclusive conclusions. However, results tend to show limited evidence for the use of SBST as a predictive instrument for patients with non-specific low back pain.

The purpose of this study was to evaluate the methods currently available to measure the functional outcomes of physiotherapy treatment for low back problems. As a preliminary step, all extant questionnaires were located and evaluated against practical criteria to determine their likely utility in clinical practice. This process identified a large number of questionnaires, however, only six back-specific questionnaires fulfilled the practical criteria for clinical application. Four of these questionnaires were selected for further evaluation along with a generic health status assessment instrument, the SF-36 Health Survey. Current recommendations suggest that a low-back specific and a generic questionnaire are required for comprehensive assessment of the impact of low back problems. The four back-specific questionnaires selected were the Oswestry Disability Questionnaire, the Quebec Back Pain Disability Scale, the Roland-Morris Disability Questionnaire and the Waddell Disability Index. An evaluation of the literature on the clinimetric properties of these questionnaires revealed that little information was available for the Quebec and Waddell questionnaires and no information was available for any of the questionnaires for a clinical population of people with low back pain seeking physiotherapy treatment in an Australian setting. The primary aim of the research was identify which, if any, of the questionnaires should be recommended for measuring outcomes of physiotherapy treatment for low back pain. Consecutive ambulatory (non-admitted) patients presenting for physiotherapy treatment at three public hospital physiotherapy outpatient departments, three community health services, and four private practices were invited to enter the study. Patients were included if they were seeking treatment for a low back problem, were aged 18 or over, and could read and write English. Subjects completed the questionnaires on two occasions six-weeks apart. One hundred and forty subjects returned the first set of questionnaires, and 106 the second set. The mean age of the sample at pre-test was 51 (SD 17) and ranged from 18 to 89 years. Sixty-six percent were female, 41% were employed and 12% were receiving compensation for their back problem. Duration of the back complaint was more than six weeks for 56% of subjects, and 60% reported five or more previous episodes or continuous pain. Referred pain in the buttock thigh or leg was reported by 70% of subjects. The first aim was to compare the questionnaires for acceptability and comprehensibility. Data quality was high for all the questionnaires (less than 5% missing data). As expected, subjects found the more complex SF-36 Health Survey more difficult to complete than three of the low-back questionnaires. However, less than 10% of subjects found any of the questionnaires more than a little difficult to complete. The next aim was to explore the internal structure and inter-relationships of the low-back questionnaires and the three physical scales of the SF-36 Health Survey (Physical Functioning, Role-Physical and Bodily Pain). Analysis of item-item correlation, item-total correlation and Cronbach�s alpha confirmed that all scales were internally consistent. Factor analysis confirmed item homogeneity (unidimensionality) of all questionnaires except the Roland-Morris Disability Questionnaire. The questionnaires were significantly intercorrelated, but correlations exceeded .70 only for the Oswestry, Quebec and Waddell questionnaires. The next aim of the research was to compare test-retest reliability of the questionnaires. The Oswestry, Quebec and SF-36 Physical Functioning scale had sufficient reliability and scale width for clinical application. Despite previous reports of high reliability, the Roland-Morris scale was significantly less reliable than several of the other questionnaires. This indicates the importance of establishing the measurement properties of a test in the population or setting in which it will be used. The Waddell Disability Index, and the SF-36 Role-Physical and Bodily Pain scales had insufficient scale width to be useful in clinical practice. More than 15% of respondents had an initial score on these scales that would not allow change to be detected with 90% confidence. The next aim of the research was to compare the responsiveness of the questionnaires. None of the questionnaires was consistently identified as more or less responsive than the others although two methods (effect size and Liang�s standardized response mean) suggested the SF-36 Bodily Pain scale was more responsive than some other questionnaires. A secondary aim of this section was to evaluate the validity of the many available responsiveness indices and a novel �reliable change� method. A �known groups� strategy was used to determine whether the responsiveness index could discriminate between the low-back relevant questionnaires and the SF-36 General Health scale, the scores of which did not change across the retest period. With the exception of the novel �reliable change� method the responsiveness indices were all found to be valid indicators of responsiveness. Guyatt�s Responsiveness Index, effect size and Liang�s standardized response mean discriminated at 95% confidence between the reference scale and all the low-back questionnaires. The standardized response mean, t-test, correlation and ROC methods discriminated between the reference scale and five or six of the seven other questionnaires. Guyatt�s index was recommended as the best of the criterion-based methods, and the effect size the best of the distribution-based methods. The three questionnaires identified as having sufficient reliability and scale width, the Oswestry, Quebec and SF-36 Physical Functioning scale, were next analysed for data fit to a Rasch model. All three questionnaires had good data fit and item function was not affected by time, age, gender or whether or not subjects reported avoiding bending. The final aim of this research was to identify by Rasch analysis items to supplement the SF-36 Physical Functioning scale. The new scale, named the Low-Back SF-36 Physical Functioning18, showed comparable reliability and responsiveness to the SF-36 Physical Functioning scale. Further research is required to establish the measurement properties of the Low-Back SF-36 Physical Functioning18 scale in an independent sample. However, it has the potential to improve the clinical measurement of function by providing clinicians with a single measurement tool for comprehensive assessment of patients with low back pain.

Background: In the clinical examination of patients with low back pain (LBP), musculoskeletal physiotherapists routinely assess lumbar spinal segmental motion by performing physical examination procedures such as observation of active range of motion and palpation of intervertebral motion. The validity of manual assessment of segmental motion, however, has not been adequately investigated. Methods: In this pragmatic, multi-centre, criterion-related validity study, 138 consecutive patients with LBP were recruited and examined by physiotherapists with postgraduate training in musculoskeletal manual therapy. Clinicians examined each patient�s spine for the presence of segmental motion abnormalities, described as lumbar segmental rigidity (LSR) and lumbar segmental instability (LSI), then referred the patients for flexion-extension (FE) radiographs. The physical examination procedures of interest were: 1) assessment of forward-bending (FB) active range of motion (AROM); 2) FB and backward-bending (BB) passive physiological intervertebral motion testing (PPIVMs) in the sagittal plane; and 3) central postero-anterior passive accessory intervertebral motion testing (PAIVMs). Sagittal displacement kinematics of the lumbar spinal segments were measured from the FE radiographs, and served as the criterion standard against which the clinical assessment results were compared. The kinematic parameters measured were sagittal rotation, sagittal translation, ratio of translation per degree of rotation (TRR), instantaneous axis of rotation (IAR), and centre of reaction (CR). Reference ranges for normal motion were calculated from the analysis of FE radiographs of 30 asymptomatic volunteers. The accuracy and validity of the clinical examination procedures were then calculated, and reported as sensitivity, specificity, and likelihood ratios for a positive test (LR+) and a negative test (LR-). Results: In patients with LBP, sagittal rotation LSR and sagittal translation LSR had a prevalence of approximately 5.7% (p <0.0005) in this cohort. Sagittal rotation LSI was not found in statistically significant numbers. Sagittal translation LSI was found at a prevalence of 3.6% (p <0.05). Abnormal TRR (23.3%), IAR (17.7%), and CR (16.5%) were more prevalent findings (all p <0.0005). Observation of the quantity of AROM, during FB, is not valid for the assessment of either total lumbar segmental sagittal rotation, or detection of individual segments with abnormal segmental motion. PPIVMs and PAIVMs are specific, but not sensitive, for the detection of rotation LSI and translation LSI. A positive test (grade 4 on a scale from 0 to 4) with BB PPIVMs may have some utility for the diagnosis of rotation LSI or translation LSI, with LR+ of 8.4 and 7.1 respectively (and 95% CIs from around 1.7 to 38). Likelihood ratio statistics for FB PPIVMs were not statistically significant. A positive test (grade 2 on a scale from 0 to 2) with PAIVMs may have some utility for the diagnosis of rotation LSI or translation LSI, with LR+ of 2.7 and 2.5 respectively (and 95% CIs from around 1.01 to 7.5). Neither PPIVMs nor PAIVMs were useful for the detection of LSR, or abnormal quality of motion as measured by TRR, CR, and IAR. Conclusions: Abnormal spinal segmental motion is associated with the symptom of LBP, in patients presenting to physiotherapists with a new episode of recurrent or chronic LBP, however prevalence is low due to highly variable lumbar segmental motion among asymptomatic individuals. Manual physical examination has moderate validity, but limited utility on its own, for the detection of translation LSI. Further research should investigate the utility of other clinical examination findings for the detection of lumbar segmental mobility disorders.