Non-specific low back pain in primary care in the Spanish National Health Service: a prospective study on clinical outcomes and determinants of management

Background  

The Spanish National Health Service is a universal and free health care system. Non-specific low back pain (LBP) is a prevalent disorder, generating large health and social costs. The objectives of this study were to describe its management in primary care, to assess patient characteristics that influence physicians' decisions, and to describe clinical outcome at 2 months.     

Chronic low back pain: a medical-psychological report

This paper begins with general discussion of chronic pain, in which the complex nature of this symptom is pointed out and the incorrect application of the widespread distinction between 'organic' and 'psychogenic' pain is criticized. A different classification which has proved clinically valuable is then briefly discussed. Subsequently, there is a discussion of the symptom of low back pain, a frequent disorder as demonstrated by the epidemiologic investigation reported. Then, reference is made to chronic low back pain which is often treated by surgical intervention such as operation for prolapsed intervertebral disc (PID). To conclude, a detailed report is presented of a study of 55 patients all of whom had been subjected at least once to a PID operation without success and who subsequently applied for partial percutaneous rhizotomy (PPR). Every patient was interviewed in depth and the results of these interviews are presented, classified by the main topics discussed. In addition, 6 months after PPR, a follow-up interview was conducted concerning the therapeutic results in the 31 patients who underwent this procedure.     

Predictors of low back pain onset in a prospective British study

OBJECTIVES: This study examined predictors of low back pain onset in a British birth cohort. METHODS: Univariate and multivariate analyses focused on individuals who experienced onset of low back pain at 32 to 33 years of age (n= 571) and individuals who were pain free (n = 5210). Participants were members of the 1958 British birth cohort. RESULTS: Incident pain was elevated among those with psychological distress at 23 years of age (adjusted odds ratio [OR] = 2.52, 95% confidence interval [CI] = 1.65, 3.86) and among persistent moderate or heavy smokers (adjusted OR = 1.63, 95% CI = 1.23, 2.17). Significant univariate associations involving other factors (e.g., social class, childhood emotional status, body mass index, job satisfaction) did not persist in multivariate analyses. CONCLUSIONS: This prospectively studied cohort provides evidence that psychological distress more than doubles later risk of low back pain, with smoking having a modest independent effect. Other prospective studies are needed to confirm these findings before implications for low back pain prevention can be assessed.     

Integrative care for the management of low back pain: use of a clinical care pathway

Background  

For the treatment of chronic back pain, it has been theorized that integrative care plans can lead to better outcomes than those achieved by monodisciplinary care alone, especially when using a collaborative, interdisciplinary, and non-hierarchical team approach. This paper describes the use of a care pathway designed to guide treatment by an integrative group of providers within a randomized controlled trial.     

An evaluation of prompt access to physiotherapy in the management of low back pain in primary care

BACKGROUND: Disability arising from low back pain (LBP) is a growing problem. Current primary care management of LBP has been criticized for its mechanistic basis and for delays in gaining access to specialist advice. Among recent recommendations made for improved management are functional explanatory models, a rehabilitative approach and early access to physical therapy. It is not known if these recommendations can be implemented in mainstream primary care. OBJECTIVE: The purpose of our study was to examine the feasibility, acceptability and component costs of providing a prompt access physiotherapy service for new episodes of LBP in primary care; to describe outcomes and compare them with other published interventions; and to explore the influence of the service on GPs' approach to LBP. METHODS: Back pain clinics staffed by a physiotherapist were established in a group of demographically representative practices in a typical UK health authority. Adult patients with a new episode of LBP referred by their GPs were managed in accordance with recent recommendations. Data on pain, disability and well-being were collected at recruitment and some 12 weeks later. Patient diaries and interviews with GPs before and after the study provided qualitative data. Comparative costings were derived from national and local sources. RESULTS: A total of 614 patients, representing 3.2% of the adult population, were referred, of whom 522 (85%) were seen at the back pain clinics within 3-4 days, the majority within 72 h. Although this represents less than half the adult patients thought to be presenting to their GPs with LBP, patients exhibited levels of pain and disability comparable with those described in other studies of LBP in primary care. More than 70% of patients required only a single clinic visit and <5% were referred on to specialist orthopaedic or back pain rehabilitation services. At follow-up, levels of improvement were comparable with and time taken off work superior to those seen in other intervention studies of LBP in primary care. Prompt access to physiotherapy in primary care costs less per episode of LBP than conventional management. Qualitative data suggest that patients valued early access to the physiotherapist, particularly for the reassurance provided. Interviews with GPs revealed strong support for the service, in large part based on favourable feedback from patients. CONCLUSIONS: For primary care patients with a new episode of LBP referred by their GP, prompt access to a dedicated physiotherapy service is both feasible and acceptable. Comparison with other published interventions suggests that it is also cost-effective and that a typical Primary Care Trust (PCT) would rapidly recoup the cost of additional physiotherapists. However, questions remain about the availability of sufficient physiotherapists to make such a service available nationally. The influence of the service upon GPs' own approach to the management of LBP is likely to be gradual and to come about largely through positive feedback from patients.     

Prognostic occupational factors for persistent low back pain in primary care

Purpose

To reduce the socio-economic burden of persistent low back pain (LBP), factors influencing the progression of acute/subacute LBP to the persistent state must be identified at an early stage.

Methods

Prospective inception cohort study of patients attending a health practitioner for their first episode of acute/subacute or recurrent LBP. Patients were assessed at baseline addressing occupational, psychological, biomedical and demographic/lifestyle factors and followed up over 6 months. Multivariate logistic regression analysis was performed separately for the variables groups of the four different domains, controlling for age, gender and body mass index. The overall predictive value was calculated for the full regression models of the different domains. Finally, all significant variables from the different domains were combined into a final predictor model.

Results

The final four-predictor model predicted 51 % of variance of persistent LBP and included ‘resigned attitude towards the job’ (OR 1.73; 95 % CI 1.16–2.59), ‘social support at work’ (OR 0.54; 95 % CI 0.32–0.90), ‘functional limitation’ (OR 1.05; 95 % CI 1.01–1.10) and ‘duration of LBP’ (OR 1.04; 95 % CI 1.02–1.06). The accuracy of the model was 83 %, with 92 % of non-persistent and 67 % of persistent LBP patients correctly identified.

Conclusions

In this study of patients with acute/subacute LBP, ‘resigned attitude towards the job’ increased the likelihood of persistent LBP at 6 month. Addressing this factor with workplace interventions has the potential to modify the outcome. In patients experiencing ‘social support at work’, the development of persistent LBP was less likely and might therefore be considered as potential resource for prevention of persistent LBP.

     

Risk factors for sick leave due to low back pain: a prospective study

The objectives of this prospective study were to identify predictive factors for sick leave of 8 days or more due to low back pain (LBSL) and to compare them with predictive factors for low back pain with no or shorter sick leave (LB) in a cohort of French workers. The predictive factors for LBSL were a past history of low back pain (odds ratio [OR], 7.2; 95% confidence interval [CI], 4.1 to 13), a low employment grade (OR, 4.3; 95% CI, 1.7 to 11), heavy smoking (OR, 5.5; 95% CI, 2.3 to 13), a pain score different from zero (OR, 4.9; 95% CI, 2.5 to 9.7), required bending backward or forward at work every day repetitively (OR, 7.4; 95% CI, 2.3 to 23), overall social integration (OR, 2.0; 95% CI, 1.3 to 3.3), and low social support at work (OR, 3.4; 95% CI, 1.6 to 7.3). Low social support at work and bending backward or forward at work were more strongly associated with LBSL than with LB (P = 0.02 and P < 0.01, respectively). The implications of the results of this prospective study are that both the level of biomechanical exposure and the psychosocial work environment, especially social support, represents important dimensions to consider in the reduction of work absenteeism.     

Smoking, heavy physical work and low back pain: a four-year prospective study.

Data from a community-based four-year prospective study were used to test the hypothesis that heavy physical work is a stronger predictor of low back pain in smokers than in non-smokers. Of 708 working responders without low back pain during the entire year prior to 1990, 562 (79%) completed a questionnaire four years later in 1994. A job involving heavy lifting and much standing in 1990 was a strong predictor of low back pain in smokers four years later [odds ratio (OR) = 5.53, 95% confidence interval (CI) = 1.93-15.84, p < 0.01) after having adjusted for other job characteristics, demographic factors, emotional symptoms, physical exercise and musculoskeletal pain elsewhere. In non-smokers, having a job with heavy lifting and much standing was not associated with low back pain. One explanation may be that smoking leads to reduced perfusion and malnutrition of tissues in or around the spine and causes these tissues to respond inefficiently to mechanical stress.     

Criteria for the management of low back pain in health care workers

Low back pain represents one of the most frequent health problems in several working populations and is an important problem for occupation health doctors. In fact, these professionals are often required to face with the specific management of this condition, also by participating with other professionals into the implementation of organizational and structural measures. This contribute describes a variety of interventions aimed at treating the syndrome and recovering the working ability of the patient-worker, including the initial clinical evaluation, the assessment of the casual relationship between work and the syndrome, the treatment, the formulation of proposals to modify the worker's physical and working activity, the ongoing heath surveillance and a more in-depth clinical and instrumental evaluation, including surgical treatment.     

Characterizing the course of low back pain: a latent class analysis

Understanding the course of back pain is important for clinicians and researchers, but analyses of longitudinal data from multiple time points are lacking. A prospective cohort study of consecutive back pain consulters from five general practices in the United Kingdom was carried out between 2001 and 2003 to identify groups defined by their pain pathways. Patients were sent monthly questionnaires for a year. Longitudinal latent class analysis was performed by using pain intensity scores for 342 consulters. Analysis yielded four clusters representing different pathways of back pain. Cluster 1 ("persistent mild"; n = 122) patients had stable, low levels of pain. Patients in cluster 2 ("recovering"; n = 104) started with mild pain, progressing quickly to no pain. Cluster 3 ("severe chronic"; n = 71) patients had permanently high pain. For patients in cluster 4 ("fluctuating"; n = 45), pain varied between mild and high levels. Distinctive patterns for each cluster were maintained throughout follow-up. Clusters showed statistically significant differences in disability, psychological status, and work absence (p < 0.001). This is the first time, to the authors' knowledge, that latent class analysis has been applied to longitudinal data on back pain patients. Identification of four distinct groups of patients improves understanding of the course of back pain and may provide a basis of classification for intervention.     

The role of physical and psychological factors in occupational low back pain: a prospective cohort study

OBJECTIVE—To examine risk factors for onset of low back pain (LBP) in healthcare workers.
METHODS—Nursing students, during their 3 year training period, and 1 year after training were studied in a prospective cohort study, with repeated self reported measurements of determinants of LBP at 6 monthly intervals for 3 years during training, and after a 12 month interval there was an additional final follow up.
RESULTS—During training, increased risk of new episodes of LBP was associated with having had LBP at baseline, with part time work, and with a high score on the general health questionnaire (GHQ). A high GHQ score preceded the onset of LBP, in such a way that a high score at the immediately previous follow up increased risk of LBP at the next follow up. 12 Months after training, a history of recurring LBP during training increased the risk of a new episode as did having obtained work as a nurse. A high GHQ score at this follow up was also associated with a concurrently increased risk. Pre-existing GHQ score, either at the end of training or at baseline, had no effect on risk of LBP 12 months after training.
CONCLUSIONS—Other than a history of LBP, pre-existing psychological distress was the only factor found to have a pre-existing influence on new episodes of LBP. Increased levels of psychological distress (as measured by the GHQ) preceded the occurrence of new episodes of pain by only short intervening periods, implying a role for acute distress in the onset of the disorder. This finding suggests that management of the onset of occupational LBP may be improved by management of psychological distress.


Keywords: low back pain; nurses; psychological factors     

Chronic low back pain: the failure of organic medicine

In this issue of the journal, a series of 67 patients is presented with persistent or recurrent chronic low back pain and leg pain after insertion of a lumbar-disc prosthesis in a private hospital in Germany. A relationship between degenerative changes in the vertebral column and chronic low back pain is often assumed but lacks a scientific basis. Psychosocial factors are much more important than biomechanical factors in determining the outcome, but the interaction between these determinants is far more complicated than just 'having problems'. Accordingly, a multidisciplinary approach is the most successful mode of treatment, while local measures aimed at the vertebral column are generally ineffective or of unproven value. Patients will continue to seek magic cures from 'quacks with a knife' as long as medical specialists are insufficiently trained to deal with unexplained somatic symptoms.     

Chronic pain in primary care.

Chronic pain is a very common cause of suffering, disability and economic adversity in the community. It is a complex problem that needs to be understood in a multi-dimensional way for effective management. Most research to date has been based in specialist clinics rather than in primary care, with consequently limited findings. Chronic pain differs from acute pain in that management follows a rehabilitative rather than a treatment model, though these are not mutually exclusive. Full assessment of the patient, preferably multi-disciplinary, will improve his or her outlook. Management should be holistic, rigorous in the application of conventional therapies (including analgesics and physical therapy) and ready to admit an improved understanding of psychological and social techniques. There may be a role for complementary therapies. As a large proportion of chronic pain presents only in the community, there may be a role for greater primary care input to management.     

Chronic pain in primary care. Identification and management of psychosocial factors

Chronic pain is a problem of great public health importance that is frequently seen in the primary care setting. Pain chronicity shows a strong association with psychosocial factors. Assessment of these factors should be composed of two parts: (1) psychological factors and (2) psychiatric illness. Psychological factors include all those pain-associated alterations in the patient's environment that reinforce illness behavior. Psychiatric illness includes those syndromes that retard recovery from illness or injury, such as depression, anxiety, substance abuse, and dementia. Psychiatric and psychological interventions can be successfully introduced in the context of a comprehensive rehabilitation effort. Usually these interventions can be accomplished by the family physician in concert with a consultant psychiatrist or psychologist. In severely disabled or resistant patients, referral to a multidisciplinary pain clinic will be necessary.