Chronic Pain Patients Research Articles

Fear of movement interacts with trunk mobility, and pain intensity to predict disability in patients with chronic low back pain: a classification and regression tree (CART) analysis.

Low back pain significantly impacts global health, particularly in low-income areas where primary care challenges are prevalent. Assessing both biophysical and psychological factors associated with low back pain-related disability is crucial for developing effective screening and management strategies. This study aimed to examine the association between fear of movement, trunk mobility, pain intensity, physical activity, and low back pain-related disability, and to identify key factors contributing to higher disability levels in patients with chronic low back pain. This cross-sectional study analyzed data from 381 chronic low back pain patients aged over 18, collected at a primary care ambulatory between 2015 and 2019. Variables measured included pain intensity, fear of movement, physical activity, trunk mobility, and disability. A Classification and Regression Tree approach was used to model disability predictors. Fear of movement was the main driver of high disability (OR = 17.3, 95%CI 8.9-33.7). Two profiles were particularly prone to higher disability: patients with high fear of movement (>47.5) and pain intensity > 1.5; and those with lower fear of movement but poor trunk mobility (>36.5 cm). Patients with better trunk mobility and low pain intensity (≤3.5) showed significantly less disability (OR = 0.06, 95%CI 0.02-0.17). The findings highlight the need for integrating better psychological and biophysical assessments in managing chronic low back pain. Understanding how fear of movement, trunk mobility, and pain interaction can improve screening accuracy and optimize care in resource-limited settings, using valid and feasible tools for these scenarios.

UK medical cannabis registry: A clinical outcome analysis of medical cannabis therapy in chronic pain patients with and without co-morbid sleep impairment.

Chronic pain (CP) affects 35.0%-51.3% of the UK population, with 67%-88% reporting sleep disturbances. Cannabis-based medicinal products (CBMPs) have shown therapeutic potential in managing CP. Evidence suggests poor sleep worsens pain perception; therefore, this study aimed to assess patient-reported outcome measures (PROMs) following CBMP treatment in CP patients with and without co-morbid sleep impairment. A prospective cohort study of CP patients from the UK Medical Cannabis Registry was conducted. Participants were separated by baseline single-item sleep quality scale (SQS) score into sleep impaired (SQS ≤3) and unimpaired (SQS ≥4) cohorts. The primary outcome assessed changes in PROMs from baseline to 1-, 3-, 6-, and 12-months. Participants completed the following: SQS, General Anxiety Disorder-7, EQ-5D-5L, Brief Pain Inventory (BPI), and Short-Form McGill Pain Questionnaire-2. Significance was defined as p < 0.050. 1139 participants met the inclusion criteria (sleep impaired: n = 517, 45.4%; sleep unimpaired: n = 622, 54.61%). The sleep impaired cohort showed improvements in all PROMs at each follow-up (p < 0.010). The sleep unimpaired cohort showed similar results (p < 0.050), except in SQS and ED-5Q-5L: self-care and anxiety/depression scores (p > 0.050). However, the sleep impaired cohort observed greater improvements in BPI pain severity (p < 0.050) and SQS (p < 0.001) than the sleep unimpaired cohort at all follow-ups. 2817 adverse events were self-reported between both cohorts (p = 0.197). These findings align with literature that shows associated improvements in pain outcomes following CBMP administration. Sleep impaired individuals were more likely to experience greater pain severity improvements. However, this was not confirmed on multivariate logistic regression analysis and instead may be confounded by baseline pain severity. Whilst these results show promise for the effects of CBMPs on CP, they must be examined within the limitations of the study design. These findings provide further evidence to support the design of subsequent randomized controlled trials to verify causality between CBMPs and pain outcomes.

Association between joint position sense, range of motion, pain-related anxiety, disability and deep neck muscles thickness in non-specific chronic neck pain patients with high and low levels of fear of pain: a cross-sectional study

Association between joint position sense, range of motion, pain-related anxiety, disability and deep neck muscles thickness in non-specific chronic neck pain patients with high and low levels of fear of pain: a cross-sectional study

Factors associated with pain-related functional interference in people with chronic low back pain enrolled in a physical exercise programme: the role of pain, sleep, and quality of life.

To identify the factors associated with the pain-related functional interference level in people with chronic low back pain. Cross-sectional. Chronic low back pain patients. Sociodemographic data, pain intensity, pain-related functional interference, physical functioning and fitness, sleep quality, anxiety and depression, social support, and health-related quality of life were recorded. Descriptive and bivariate analyses were performed. A linear regression model was carried out to identify the factors associated with the pain-related functional interference level. 99 participants were involved (mean age: 54.37 SD: 12.44; women: 67.7%). 37.4%, 27.3%, and 35.4% were classified into low, moderate, and high pain-related functional interference level groups, respectively. Higher pain-related functional interference was associated with higher pain intensity (β: 0.724; p = 0.026), worse sleep quality (β: 0.077; p = 0.012), worse quality of life (physical (β: -0.539; p < 0.001) and mental (β: -0.289; p < 0.001), and lower consumption of weak opioids (β: -3.408; p = 0.037). Beyond the pain experience and intensity among people with chronic low back pain, several biopsychosocial factors associated with this condition has been identified. Furthermore, higher pain intensity, worse sleep quality, worse quality of life, and weak opioids' consumption have been related to the pain-related functional interference of this population.

Musculoskeletal pain is associated with poor sleep quality and increased daytime sleepiness in dental students: a cross-sectional pilot study.

While a bidirectional relationship between sleep health and musculoskeletal (MSK)-pain have been established among chronic pain patients, few studies explored it among dental students. This cross-sectional study assessed the relationship of self-report MSK-pain with sleep health and psychological outcomes among dental students, and whether differences existed as a function of number and location of painful body-sites. Validated questionnaires were sent through REDCap to dental students at a predoctoral dental school, assessing presence, location (head, shoulder/neck, jaw, back, body), and intensity of MSK-pain, sleep health (risk of sleep apnea, insomnia severity symptoms, sleep quality, daytime sleepiness, and chronotype), and psychological outcomes (anxiety/depression). Differences between those with and without MSK-pain, and across participants with different number and location of painful sites were tested with t-tests and ANOVA, adjusting for age/gender. Out of 80 participants (82.5% females), 76.3% reported MSK-pain (68.9% in neck/shoulders). Those with MSK-pain scored significantly worse in sleep quality (7.7±3.7 vs. 4.8±2.1, p<.001), daytime sleepiness (6.1±4.2 vs. 3.3±2.7, p<.001). Those with >3 painful body-sites reported worse sleep quality (p=.006) and daytime sleepiness (p=.003) than pain-free controls. There were no differences on sleep and psychological outcomes as a function of number of painful body-sites. Those reporting back pain scored worse in insomnia (p=.037), daytime sleepiness (p=.002), and sleep quality (p=.006) than those without back pain. MSK-pain is prevalent among dental students and associated with worse sleep health. While number of painful sites may not influence sleep/psychological health, specific locations (e.g., back pain) were associated with worse sleep functioning.

The Efficacy of Botulinum Toxin A Injection in Pelvic Floor Muscles in Chronic Pelvic Pain Patients: A Double-Blinded Randomised Controlled Trial.

To evaluate and compare the efficacy and safety of Botulinum Toxin A (BTA) injections versus placebo injections, combined with pelvic floor muscle therapy (PFMT), in women with chronic pelvic pain (CPP). Randomised, double-blinded clinical trial (January 2020-April 2023). This multicentre study was conducted at four hospitals in the Netherlands. Ninety-four women with CPP and increased pelvic floor muscle tone despite previous PFMT, were enrolled. Participants received either BTA injections (100 units) or placebo injections into the pelvic floor muscle, followed by four PFMT sessions. Primary outcomes included the number of women with at least a 33% reduction in pain and those reporting (very) much improvement of their pain. Secondary outcomes covered quality of life and pelvic floor function. Follow-up visits were scheduled at 4, 8, 12, and 26 weeks post-treatment. Mixed models for repeated measurements were used for analysis. A 33% reduction or more in average pain score was reported by 15 participants (33%) after BTA treatment and 9 participants (20%) after placebo treatment (odd ratio placebo/BTA 1.88; 95% CI 0.72-4.90, p = 0.19). In both groups, 8 women (17%) reported their improvement as (very) much better (odd ratio placebo/BTA 0.947; 95% CI 0.32-2.80, p = 0.92). Pelvic floor resting activity decreased significantly after BTA treatment compared to placebo (p = 0.001). The results from this study do not support the use of BTA injections in the management of CPP in women.

Validation analysis of Polish version of Neuropathic Pain Questionnaire - Short Form (NPQ-SF-PL) and assessment of quality of life in patients with chronic neuropathic pain.

The aims of this study were to translate and culturally adapt the Polish version (PL) of the Neuropathic Pain Questionnaire-Short Form (NPQ-SF), as well as to compare this questionnaire to other diagnostic tools in terms of reliability and psychometric validity. Neuropathic pain (NP) affects up to 10% of the general population. Despite a large number of studies, almost 50% of patients have a poor therapeutic outcome. Diagnostic tools are intended to distinguish between NP and non-NP (NoP) and to guide the examiner to perform further diagnostics in accordance with the guidelines. A total of 140 patients with chronic pain (ChP), 90 with NP and 50 with NoP, were enrolled into this study. NPQ-SF-PL has been developed following the guidelines for translation and cultural adaptation. Reliability of the translated version was examined using internal consistency, predictive validity, and intraclass correlation coefficient (ICC). In the study, women predominated over men, and the average age was 53.22. Cronbach's α value for the entire scale was 0.76 and ICC for test-retest reliability was 0.631. Receiver-operating characteristic curve analysis gave a sensitivity of 90.0% and a specificity of 88.0%. Area under the curve was 0.94. NPQ-SF-PL was moderately associated with self-completed Leeds Assessment of Neuropathic Symptoms and Signs (S-LANSS) and weakly associated with the Numerical Rating Scale (NRS). The NP group obtained statistically significantly lower scores than the NoP group in all domains of the 36-Item Short Form Health Survey (SF-36), thus indicating worse health status. Patients aged over 41 years presented a worse quality of life compared to younger ones. Also, more than half of the patients with NP of both genders experienced symptoms of mild or more severe depression. NPQ-SF-PL is a valid screening tool for assessing NP in Polish chronic pain patients. The obtained results showed very good psychometric properties and adequate internal consistency. The repeatability of the questionnaire indicated moderate reliability. Clinical implications/future directions. We believe this study will provide physicians with a new instrument for the evaluation of NP for clinical and research purposes.

Surgical Recovery Among Patients With Chronic Pain Undergoing Pelvic Reconstructive Surgery.

Limited data exist on postoperative recovery among patients with chronic pain undergoing pelvic reconstructive surgical procedures. The objective of this study was to evaluate if patients with versus without self-reported chronic pain experience different recovery after pelvic reconstructive surgery. From September 2022 to May 2023, this prospective cohort study enrolled patients with and without chronic pain, who were undergoing vaginal or laparoscopic procedures for pelvic organ prolapse. Preoperative pain was assessed using the Brief Pain Inventory (BPI) and Pepper Assessment Tool for Disability (PAT-D). Postoperative recovery was evaluated at 2, 4, and 12 weeks using the Postdischarge Surgical Recovery (PSR) scale, Global Surgical Recovery (GSR) index, and PAT-D questionnaire. The primary outcome was PSR scores at 4 weeks postoperatively. Ninety patients were recruited, with 43 reporting chronic pain and 47 without. Demographics were similar. Patients with chronic pain had higher preoperative BPI and PAT-D scores. Perioperative outcomes and hospital stay were similar. Patients with chronic pain used more postoperative opioids in the hospital (27.0 ± 27.8 vs 24.3 ± 60.3 morphine milligram equivalents [MME]; P = 0.03) and at home (40.1 ± 54.7 vs 19.9 ± 39.0 MME; P = 0.03). The PSR scores at 4 weeks were not significantly different. No differences were observed in PSR or GSR scores at all time points. Patients with chronic pain had a higher PAT-D score at 12 weeks. Fewer chronic pain patients returned to work by 12 weeks and desired more time off work. Patients with and without chronic pain had similar surgical outcomes and recovery. However, chronic pain patients required more postoperative opioid pain medication and preferred more time off work.

Assessing cognitive impairment in chronic pain: a cross-sectional study with healthy controls

Purpose The aim of this study is to clarify inconsistencies in the literature regarding the neuropsychological impact of chronic pain and determine how pain catastrophizing and pain intensity may explain cognitive impairment. Methods This cross-sectional study involved 30 participants with chronic primary musculoskeletal pain and 30 healthy controls without pain. The instruments used were the Pain Catastrophizing Scale, the Visual Analogue Scale, the Beck Anxiety Inventory, the Beck Depression Inventory–II, the Wisconsin Card Sorting Test, the Stroop Test, and the Working Memory Index of the Wechsler Adult Intelligence Scale. Results Chronic pain patients showed slight cognitive impairments in selective attention, sustained attention, working memory, problem solving, planning, abstract reasoning, inhibition, and resistance to interference. The data also indicate that higher levels of pain catastrophizing and pain intensity were independently associated with greater cognitive impairment in patients with pain, specifically in attention and executive functioning. Additionally, the interaction between these pain-related variables predicted further cognitive impairment. Conclusions This research has contributed to establishing the neuropsychological profile of patients with chronic primary musculoskeletal pain and reinforces evidence of the impact of chronic pain on cognition. These findings may help guide the design of programs aimed at improving cognitive performance.

Combat-Relevant Anesthesia Fellowships Help Sustain the Army's Multidomain Medical Force.

In the community of Army Nurse Anesthetists, there is an underutilized potential for Combat-Relevant Fellowship training that, if enthusiastically encouraged and taken advantage of, would proffer many benefits to the Military Health System and the beneficiaries of its care. Most importantly, increased access to and encouragement for participation in these fellowships for Nurse Anesthetists would act as a tool for skill sustainment, denying any potential for skill degradation or readiness gaps in preparation for the next-generation war. These fellowships would also augment the already robust breadth, quality, and safety of Army Nurse Anesthetists' combat and noncombat anesthesia care, potentially increase Return-To-Duty rates, potentially expedite casualty clearance of the battlefield, increase the often-limited access to advanced pain management care for chronic pain patients in Military Treatment Facilities, increase the retention rates of Nurse Anesthetists, augment the military anesthesia community's knowledge-base, and help to advance the art of anesthesia as a whole. To triumph against the anticipated rigors of the future war's multidomain operational environment, we are duty bound to continually improve and strive to be the best versions of ourselves as soldiers, as professionals, and as communities. This paper will explore the untapped utility of Combat-Relevant Fellowships for Army Nurse Anesthetists.

Effect of Deep Diaphragmatic Breathing on Pain in Patients with Metastatic Gastrointestinal Cancers

BackgroundPatients with gastrointestinal cancers commonly experience acute and chronic pain. This study aimed to determine the effect of deep diaphragmatic breathing on acute and chronic pain in patients with metastatic gastrointestinal cancers. MethodsThis clinical trial was conducted in Kermanshah-Iran in 2022. The sample consisted of 44 patients hospitalized in the oncology ward, who were selected by convenient sampling and randomly allocated into case and control groups. The case group performed diaphragmatic deep breathing intervention for 10 days, twice a day, for 10 minutes. The subjects completed pain assessment tools before and after the intervention. Data were analyzed using SPSS Version 24. ResultsThe study included participants with a Mean and Standard Deviation(SD) age of 53.95 ± 10.51 years. The case and control groups were similar in terms of demographic variables. The mean and sd acute pain score before the intervention was 3.50±1.84 in the experimental group and 2.18±1.65 in the control group (p=0.01). However, after the intervention, the score decreased to 1.72±1.07 in the experimental group and increased to 3.72±1.95 in the control group (p=0.001). The two groups did not differ significantly in terms of chronic pain before the intervention (p=0.07). However, after the intervention, the score decreased in the experimental group and increased in the control group, with a significant difference (p=0.01). ConclusionThe results of this study suggest that deep diaphragmatic breathing reduces pain in patients with gastrointestinal cancer. Including this method as a routine care program for cancer patients is recommended.

Association of Vitamin D with Haematological Inflammatory Indices in Patients with Back Pain.

To assess the relationship between vitamin D and haematological inflammatory indices (HII) in chronic low back pain (CLBP) patients. Descriptive study. Place and Duration of the Study: Harran University Hospital, Sanliurfa, Turkiye, between September 2023 and February 2024. A total of 100 CLBP patients were divided into three groups according to their vitamin D levels as deficiency (<20 µg/L), insufficiency (20-30 µg/L), and sufficiency (30-80 µg/L). Demographic characteristics, serum parameters, and HII were compared among the three groups. Additionally, the association between vitamin D and other parameters were investigated. The three groups were similar in terms of age (p = 0.640), gender distribution (p = 0.057), body mass index (BMI, p = 0.855), C-reactive protein (CRP, p = 0.965), leucocyte count (p = 0.979), neutrophil count (p = 0.525), lymphocyte count (p = 0.246), monocyte count (p = 0.485), platelet count (p = 0.878), and HII including neutrophil-to-lymphocyte ratio (NLR, p = 0.335), monocyte-to- lymphocyte ratio (MLR, p = 0.227), platelet-to-lymphocyte ratio (PLR) (p = 0.898), neutrophil-to-lymphocyte*platelet ratio (NLPR, p = 0.543), systemic inflammatory index (SII, p = 0.300), systemic inflammatory response index (SIRI, p = 0.187), and aggregate index of systemic inflammation (AISI, p = 0.219). No significant correlation was found between vitamin D concentration and other parameters (p >0.05). The coexistence of vitamin D deficiency and increased HII may accompany inflammatory conditions. However, no significant association was found between vitamin D level and HII in non-inflammatory CLBP. Inflammation, Low back pain, Neutrophil, Complete blood count, Vitamin D.

Association of Vitamin D with Haematological Inflammatory Indices in Patients with Back Pain.

To assess the relationship between vitamin D and haematological inflammatory indices (HII) in chronic low back pain (CLBP) patients. Descriptive study. Place and Duration of the Study: Harran University Hospital, Sanliurfa, Turkiye, between September 2023 and February 2024. A total of 100 CLBP patients were divided into three groups according to their vitamin D levels as deficiency (<20 µg/L), insufficiency (20-30 µg/L), and sufficiency (30-80 µg/L). Demographic characteristics, serum parameters, and HII were compared among the three groups. Additionally, the association between vitamin D and other parameters were investigated. The three groups were similar in terms of age (p = 0.640), gender distribution (p = 0.057), body mass index (BMI, p = 0.855), C-reactive protein (CRP, p = 0.965), leucocyte count (p = 0.979), neutrophil count (p = 0.525), lymphocyte count (p = 0.246), monocyte count (p = 0.485), platelet count (p = 0.878), and HII including neutrophil-to-lymphocyte ratio (NLR, p = 0.335), monocyte-to- lymphocyte ratio (MLR, p = 0.227), platelet-to-lymphocyte ratio (PLR) (p = 0.898), neutrophil-to-lymphocyte*platelet ratio (NLPR, p = 0.543), systemic inflammatory index (SII, p = 0.300), systemic inflammatory response index (SIRI, p = 0.187), and aggregate index of systemic inflammation (AISI, p = 0.219). No significant correlation was found between vitamin D concentration and other parameters (p >0.05). The coexistence of vitamin D deficiency and increased HII may accompany inflammatory conditions. However, no significant association was found between vitamin D level and HII in non-inflammatory CLBP. Inflammation, Low back pain, Neutrophil, Complete blood count, Vitamin D.

Hip joint kinematic assessment in chronic non-specific low back pain patients A Delphi Study

Hip joint kinematic assessment in chronic non-specific low back pain patients A Delphi Study

Assessment of chronic pain: multidimensional tools, applicability, and practicality

Introduction: Chronic pain (CP) negatively impacts patients’ physical and psychological status. Thus, it has the potential to affect every aspect of everyday life. In Portugal, CP is a major public health problem that affects roughly 36.7% of adults. Nevertheless, assessment of this condition is still far from ideal. A Portuguese study showed that most of last year’s medical students and first-year residents did not routinely assess pain. Additionally, the best-known pain assessment tools are the ones that focus only on pain intensity, thus disregarding the multidimensional nature of pain. Objectives: This study aims to review pain assessment tools that consider the nature of pain and its impact on patients' functionality. The ultimate goal is to increase the knowledge and dissemination of such tools. Methods: Focus groups were conducted with a panel of 29 Portuguese physicians specialized in family medicine and orthopaedics. Several pain assessment tools were debated regarding applicability, practicality, and relevance. After group discussion, five pain assessment tools were considered particularly relevant. Results: The characteristics, advantages, and disadvantages of five pain assessment tools (ACT-UP, CAPA, Barthel index, BPI, and EQ-5D), and the need for their applicability in the family medicine clinical practice are summarized and highlighted. Functional assessment of CP patients is a key step to deciding the most adequate treatment regimen since the individual nature of patients will cause them to be differently affected by distinct limitations, even if the intensity of pain is similar. Conclusion: The implementation use of these tools in clinical practice will be crucial for the improvement of CP management.

A Novel Labeling Method of Physiological-based Pressure Pain Assessment Among Patients With and Without Chronic Low Back Pain

Pain, especially chronic pain, is a complicated and subjective experience, threatening global healthcare as one of the most severe health problems. Traditionally, pain is assessed by Visual Analog Scale to indicate the pain intensity by the patient’s self-report, causing them to become biased by various psychosocial factors. In this study, we performed two distinct labeling methods to assess the pressure pain in Quantitative Sensory Testing and to differentiate healthy controls and chronic low back pain patients: time period labels and percentage timestamp labels. Physiological signals such as blood volume pulse and galvanic skin response were collected. The time period labeling method was to segment via fixed time windows. The percentage timestamp labeling method was to select the timestamp labels based on the percentage of the threshold or the tolerance time. Both methods demonstrate different advantages when visualizing the information of different pain states and different participant groups.

Unmet Needs in Spondyloarthritis: Understanding and Managing Chronic Pain.

Among patients with axial spondyloarthritis (axSpA), persistent pain remains a critical unmet need. In this review, we discuss the prevalence of chronic pain and fibromyalgia in patients with axSpA and examine the existing knowledge on the pathophysiology of chronic pain in SpA, osteoarthritis, and rheumatoid arthritis. Finally, we discuss the specific unmet needs that must be addressed to improve long-term outcomes in axSpA, specifically those that will improve chronic pain in this patient population.

Creation of Music-Induced Analgesia in Chronic Pain Patients through Endogenous Opioid Production: A Narrative Review

Chronic pain affects over 30% of the global population, and reliance on external drugs for treatment has led to major issues, including the present opioid epidemic. A healthier option is necessary, which is why music therapy’s analgesic effects have been extensively studied within the last 20 years. Not only is music relatively harmless but given that chronic pain patients require repeated treatment, musical intervention is far more accessible and economical. While the mechanisms underlying music-induced analgesia are relatively unclear, the production of endogenous opioids while listening to music through both the descending pain modulatory circuit and the limbic system, is postulated to play this role. This review describes the brain regions and pathways by which music may trigger the release of endogenous opioids such as enkephalins, endorphins, and dynorphins. More importantly, it discusses the cellular mechanisms through which these neuropeptides are thought to mediate pleasure-induced analgesia in chronic pain patients.

ANXA2 Enhances the Malignancy of Gastric Cancer Cells by Remodeling Cytoskeleton

ANXA2 was reported as a multiple tumors relevant gene expressed excessively in many tumors, especially in cancers from the digestion system, and its aberrant expression enhances the malignant properties of cancer cells. We suppose that microstructure heterogeneity is important to maintain the malignancy of cancer cells, and ANXA2 excessive expression enhances the malignancy by remodeling the microstructures of cancer cells. To validate the proposal, we studied the effects of ANXA2 expression on the remodeling of motility-associated microstructures in SGC-7901 cells by a series of morphological display methods. The results showed that the cell motility microstructures, such as pseudopodia/filopodia and microvilli, were weaker and poorer in ANXA2-silenced SGC-7901 cells than in wild type cells, and the malignancy was significantly decreased in ANXA2 silenced SGC-7901 cells. These findings indicate that ANXA2 is necessary to maintain the changed cytoskeleton of cancer cells, especially the highly polymerized cytoskeleton protein, actin, and tubulin, which leads to the alteration of the cell microstructures that are closely correlated with cell motility. Our results indicate that ANXA2 plays an important role in enhancing the malignancy of gastric cancer cells by remodeling the cytoskeleton microstructures of polymerization. In this short article, we will try to shed light on this very important problem helping chronic pain patients to understand the nature of their pain and advising them how to deal with it.

The association between perceived sensitivity to medicines, reported side effects and personal characteristics: A secondary analysis of an RCT.

A patient's perceived sensitivity to medicines (PSM) might influence the reported side effects of a treatment. The experience of side effects can result in personal and structural costs (such as nonadherence). Research on nocebo mechanisms and the workings of side effect reporting has been disproportionally smaller compared to the emerging evidence of the individual and clinical impact of the matter. In this study, we explored and re-examined the association between PSM and reported side effects within a specific population (chronic low back pain patients receiving acupuncture treatment), including possible mediating variables (i.e., gender, medical and nonmedical care utilization, optimism, pessimism, anxiety, depression and treatment expectation). We conducted a secondary analysis of a randomized controlled trial that examined the influence of treatment outcome expectations in chronic low back pain (CLBP) patients. All measures in the analysis were self-assessments. We explored the association between PSM, reported side effects and personal characteristics using correlational and regression analyses. Our sample consisted of 152 CLBP patients (65.8% female), the mean age was 39.5 years (SD = 12.5). We found positive correlations between PSM and reported side effects (r = 0.24; p < 0.01) and between PSM and anxiety (r = 0.21; p < 0.05). However, the subsequent regression analyses did not confirm a mediating or moderating effect of anxiety between PSM and reported side effects. We confirmed and extended earlier research on PSM. Our study involved a specific pain population receiving a nonpharmacological intervention. Our results highlight the importance of targeting PSM and anxiety within a treatment to take measures to mitigate the prevalence of side effects.