Introduction Negative pain-related cognitions are associated with persistence of low-back pain (LBP), but the mechanism underlying this association is not well understood. We propose that negative pain-related cognitions determine how threatening a motor task will be perceived, which in turn will affect how lumbar movements are performed, possibly with negative long-term effects on pain. Objective To assess the effect of postural threat on lumbar movement patterns in people with and without LBP, and to investigate whether this effect is associated with task-specific pain-related cognitions. Methods 30 back-healthy participants and 30 participants with LBP performed consecutive two trials of a seated repetitive reaching movement (45 times). During the first trial participants were threatened with mechanical perturbations, during the second trial participants were informed that the trial would be unperturbed. Movement patterns were characterized by temporal variability (CyclSD), local dynamic stability (LDE) and spatial variability (meanSD) of the relative lumbar Euler angles. Pain-related cognition was assessed with the task-specific ‘Expected Back Strain’-scale (EBS). A three-way mixed Manova was used to assess the effect of Threat, Group (LBP vs control) and EBS (above vs below median) on lumbar movement patterns. Results We found a main effect of threat on lumbar movement patterns. In the threat-condition, participants showed increased variability (MeanSDflexion-extension, p<0.000, η2 = 0.26; CyclSD, p = 0.003, η2 = 0.14) and decreased stability (LDE, p = 0.004, η2 = 0.14), indicating large effects of postural threat. Conclusion Postural threat increased variability and decreased stability of lumbar movements, regardless of group or EBS. These results suggest that perceived postural threat may underlie changes in motor behavior in patients with LBP. Since LBP is likely to impose such a threat, this could be a driver of changes in motor behavior in patients with LBP, as also supported by the higher spatial variability in the group with LBP and higher EBS in the reference condition.
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Introduction: Illness Perceptions (IPs) may play a role in the management of persistent low back pain. The mediation and/or moderation effect of IPs on primary outcomes in physiotherapy treatment is unknown. Methods: A multiple single-case experimental design, using a matched care physiotherapy intervention, with three phases (phases A-B-A’) was used including a 3 month follow up (phase A’). Primary outcomes: pain intensity, physical functioning and pain interference in daily life. Analyzes: linear mixed models, adjusted for fear of movement, catastrophizing, avoidance, sombreness and sleep. Results: Nine patients were included by six different primary care physiotherapists. Repeated measures on 196 data points showed that IPs Consequences, Personal control, Identity, Concern and Emotional response had a mediation effect on all three primary outcomes. The IP Personal control acted as a moderator for all primary outcomes, with clinically relevant improvements at 3 month follow up. Conclusion: Our study might indicate that some IPs have a mediating or a moderating effect on the outcome of a matched care physiotherapy treatment. Assessing Personal control at baseline, as a relevant moderator for the outcome prognosis of successful physiotherapy management of persistent low back pain, should be further eplored.
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BACKGROUND: Lower urinary tract symptoms (LUTS) may be a relevant comorbidity when managing people with low back or pelvic girdle pain. It is unknown how often physiotherapists inquire about LUTS, and what the potential barriers and facilitators are to inquire about LUTS in this patient population.OBJECTIVE: To explore the frequency of inquiring about LUTS, and to identify the barriers and facilitators among physiotherapists with and without additional pelvic health training to ask for LUTS in people with low back or pelvic girdle pain.DESIGN: A qualitative study using thematic analysis.METHODS: Through purposeful sampling, 29 primary care physiotherapists were interviewed (16 physiotherapists and 13 physiotherapists with additional pelvic health training). Thematic analysis was performed to identify themes regarding facilitators and barriers.FINDINGS: The frequency of inquiring about LUTS was: 'never': 10%, 'sometimes': 38%, and 'always': 52%. Four barriers were identified: (1) lack of knowledge of the physiotherapist, (2) a standardised assessment approach which did not include LUTS, (3) patient expectations assumed by the physiotherapist, and (4) social, cultural and personal barriers. Three facilitators were identified: (1) communication skills and experience of the physiotherapist, (2) education and knowledge, and (3) interprofessional consultation and referral.CONCLUSION: The majority of physiotherapists surveyed in this study regularly asked for LUTS in people with low back or pelvic pain. For when not asked, the identified barriers seem modifiable with adequate training, knowledge and skill acquisition, and sound clinical reasoning.
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