Birgitta Öberg

A Consensus Approach Toward the Standardization of Back Pain Definitions for Use in Prevalence Studies

Study Design. A modified Delphi study conducted with 28 experts in back pain research from 12 countries. Objective. To identify standardized definitions of low back pain that could be consistently used by investigators in prevalence studies to provide comparable data. Summary of Background Data. Differences in the definition of back pain prevalence in population studies lead to heterogeneity in study findings, and limitations or impossibilities in comparing or summarizing prevalence figures from different studies. Methods. Back pain definitions were identified from 51 articles reporting population-based prevalence studies, and dissected into 77 items documenting 7 elements. These items were submitted to a panel of experts for rating and reduction, in 3 rounds (participation: 76%). Preliminary results were presented and discussed during the Amsterdam Forum VIII for Primary Care Research on Low Back Pain, compared with scientific evidence and confirmed and fine-tuned by the panel in a fourth round and the preparation of the current article. Results. Two definitions were agreed on a minimal definition (with 1 question covering site of low back pain, symptoms observed, and time frame of the measure, and a second question on severity of low back pain) and an optimal definition that is made from the minimal definition and add-ons (covering frequency and duration of symptoms, an additional measure of severity, sciatica, and exclusions) that can be adapted to different needs. Conclusion. These definitions provide standards that may improve future comparisons of low back pain prevalence figures by person, place and time characteristics, and offer opportunities for statistical summaries.

Intra- and inter-tester reliability and reference values for hand strength

The intra- and inter-tester reliability for measurement of handgrip strength and indexgrip strength using the Jamar dynamometer was investigated in 32 healthy volunteers, and the intra-tester reliability in 13 patients with cervical radiculopathy. The results from the reliability studies showed that handgrip and indexgrip strength measured with the Jamar dynamometer is a reliable method (ICC values 0.85-0.98) and can be recommended for use in clinical practice. Age- and sex-specific reference values for handgrip strength and indexgrip strength were measured with the Jamar dynamometer in 101 randomly selected healthy volunteers, aged 25-64 years. The results from the reference value study showed that sex is a more important determinant of hand strength than age, height and body weight. The reference values for hand strength improve the potential for objective evaluation of patients with arm/hand disorders caused by cervical radiculopathy.

Incidence of soccer injuries and their relation to training and team success

One hundred-eighty players in a male soccer senior division of 12 teams were observed prospectively for 1 year to study the risk of soccer injuries in relation to exposure and to establish the connection between training, injuries, and team success. Totally, more than 100 hours of practice were analyzed. All injuries were examined by the same orthopaedic surgeon. On the average, each team played 36 games and had 95 practice sessions with 66% attendance of selected players. A direct correlation was noted be tween team success and the amount of training. Teams with more than average training showed a diminishing number of injuries. A high practice-to- game ratio seems to be advantageous. One injury every third game and every ninth practice session was documented. For the individual player the incidence of injury was 7.6/1000 practice hours and 16.9/1000 game hours. The incidence of injury was higher at training camps. Correlation was noted between the design of the train ing and the incidence of injuries. The duration of warming up seemed adequate, but its content did not appear to be satisfactory from a clinical point of view. Redesign of the warm-up with more emphasis on flexibility and the addition of a cool-down is suggested to reduce injuries.

Effects of warming up, massage, and stretching on range of motion and muscle strength in the lower extremity:

The effects of general warming up, massage, and stretching on ranges of motion (ROM) and strength of quadriceps and hamstring muscles were measured in eight male volunteers. Thigh muscle strength was not influenced by the experimental procedures. Stretching resulted in a significantly increased range of hip flexion/ extension, hip abduction, knee flexion, and ankle dor siflexion; the effect was significantly greater than that obtained by massage and warming up separately or combined. Only ankle dorsiflexion was influenced by massage or warming up, whereas stretching affected all muscle groups tested. Stretching was, therefore, superior to the other methods tested for increasing flexibility in the lower extremity.

One-Year Follow-up Comparison of the Cost and Effectiveness of Chiropractic and Physiotherapy as Primary Management for Back Pain : Subgroup Analysis, Recurrence, and Additional Health Care Utilization

Study Design. A randomized trial was conducted in which patients with back and neck pain, visiting a general practitioner, were allocated to chiropractic or physiotherapy. Objectives. To compare outcome and costs of chiropractic and physiotherapy as primary treatment for patients with back and neck pain, with special reference to subgroups, recurrence rate, and additional health care use at follow‐up evaluation 12 months after treatment. Summary of Background Data. Earlier studies on the effect of spinal manipulation have shown inconsistent results. Mostly they include only short‐term follow‐up periods, and few cost‐effectiveness analyses have been made. Methods. A group of 323 patients aged 18‐60 years who had no contraindications to manipulation and who had not been treated within the previous month were included. Outcome measures were changes in Oswestry scores, pain intensity, and general health; recurrence rate; and direct and indirect costs. Results. No differences were detected in health improvement, costs, or recurrence rate between the two groups. According to Oswestry score, chiropractic was more favorable for patients with a current pain episode of less than 1 week (5%) and physiotherapy for patients with a current pain episode of greater than 1 month (6.8%). Nearly 60% of the patients reported two or more recurrences. More patients in the chiropractic group (59%) than in the physiotherapy group (41%) sought additional health care. Costs varied considerably among individuals and subgroups; the direct costs were lower for physiotherapy in a few subgroups. Conclusions. Effectiveness and costs of chiropractic or physiotherapy as primary treatment were similar for the total population, but some differences were seen according to subgroups. Back problems often recurred, and additional health care was common. Implications of the result are that treatment policy and clinical decision models must consider subgroups and that the problem often is recurrent. Models must be implemented and tested.

Effect of specific exercise strategy on need for surgery in patients with subacromial impingement syndrome: randomised controlled study

Objective To evaluate if a specific exercise strategy, targeting the rotator cuff and scapula stabilisers, improves shoulder function and pain more than unspecific exercises in patients with subacromial impingement syndrome, thereby decreasing the need for arthroscopic subacromial decompression. Design Randomised, participant and single assessor blinded, controlled study. Setting Department of orthopaedics in a Swedish university hospital. Participants 102 patients with long standing (over six months) persistent subacromial impingement syndrome in whom earlier conservative treatment had failed, recruited through orthopaedic specialists. Interventions The specific exercise strategy consisted of strengthening eccentric exercises for the rotator cuff and concentric/eccentric exercises for the scapula stabilisers in combination with manual mobilisation. The control exercise programme consisted of unspecific movement exercises for the neck and shoulder. Patients in both groups received five to six individual guided treatment sessions during 12 weeks. In between these supervised sessions the participants performed home exercises once or twice a day for 12 weeks. Main outcome measures The primary outcome was the Constant-Murley shoulder assessment score evaluating shoulder function and pain. Secondary outcomes were patients’ global impression of change because of treatment and decision regarding surgery. Results Most (97, 95%) participants completed the 12 week study. There was a significantly greater improvement in the Constant-Murley score in the specific exercise group than in the control exercise group (24 points (95% confidence interval 19 to 28.0) v 9 points (5 to 13); mean difference between group: 15 points (8.5 to 20.6)). Significantly more patients in the specific exercise group reported successful outcome (defined as large improvement or recovered) in the patients’ global assessment of change because of treatment: 69% (35/51) v 24% (11/46); odds ratio 7.6, 3.1 to 18.9; P<0.001. A significantly lower proportion of patients in the specific exercise group subsequently chose to undergo surgery: 20% (10/51) v 63% (29/46); odds ratio 7.7, 3.1 to 19.4; P<0.001). Conclusion A specific exercise strategy, focusing on strengthening eccentric exercises for the rotator cuff and concentric/eccentric exercises for the scapula stabilisers, is effective in reducing pain and improving shoulder function in patients with persistent subacromial impingement syndrome. By extension, this exercise strategy reduces the need for arthroscopic subacromial decompression within the three month timeframe used in the study. Trial registration Clinical trials NCT01037673

Pelvic Girdle Pain and Lumbar Pain in Pregnancy : A Cohort Study of the Consequences in terms of Health and Functioning

Study Design. A cohort study in pregnancy. Objectives. To differentiate between pregnancy-related pelvic girdle pain (PPGP) and lumbar pain, and to study the prevalence of each syndrome and its consequences in terms of pain, functioning, and health. Summary of Background Data. When studying prevalence, etiology, and consequences, differentiation between PPGP and lumbar pain is important, and, to our knowledge, its consequences for functioning and health during pregnancy have not previously been studied. Methods. All women answered questionnaires (demographic data, EuroQol). Women with lumbopelvic pain completed the Oswestry Disability Index, pain intensity measures, in addition to undergoing a mechanical assessment of the lumbar spine, pain provocation tests, and active straight leg raising test. Results. Of 313 women, 194 had lumbopelvic pain. The PPGP subgroup comprised 54% of those women with lumbopelvic pain, lumbar pain 17%, and combined PPGP and lumbar pain 29%. Women having both PPGP and lumbar pain reported the highest consequences in terms of health and functioning. Conclusions. Pain intensity, disability, and health measurements differentiate subgroups of lumbopelvic pain in pregnancy.

Clinical course in patients seeking primary care for back or neck pain : a prospective 5-year follow-up of outcome and health care consumption with subgroup analysis

Study Design. Prospective follow-up. Objective. To describe the 5-year clinical course in a cohort of patients treated for back or neck pain in primary care and compare results with the 1-year outcome both for the whole group and for subgroups. Summary of Background Data. A randomized study showed a decrease in perceived pain and disability after treatment by chiropractic or physiotherapy, but many reported recurrence or continual pain at the 1-year follow-up. Knowledge of the clinical course over longer follow-up periods is limited. Methods. A 5-year follow-up questionnaire was sent to 314 individuals. Main outcome measures were pain intensity, Oswestry score, and general health. Recurrence, health care consumption, and other measures were described. Results. Fifty-two percent of respondents reported pain (visual analog scale, >10 mm) and back-related disability (Oswestry, >10%) at the 5-year follow-up. This was similar to 1-year results, and 84% of these were the same individuals. Sixty-three percent reported recurrence or continual pain, and 32% reported health care consumption at the 5-year follow-up. Conclusions. In a cohort of individuals of working age seeking primary care for nonspecific back or neck pain, it can be expected that about half of the population will report pain and disability at the 5-year follow-up. A significant proportion will report recurrence or continual pain and health care consumption. Pain and disability were associated with recurrence or continual pain and health care consumption. Further analysis is needed to identify additional predictors for 5-year outcome, taking into account 1-year follow-up results. Since many patients will have recurrence or continual pain, health policies and clinical decision models for long-term outcome must allow for these aspects.

A CRITICAL ANALYSIS OF RANDOMISED CLINICAL TRIALS ON NECK PAIN AND TREATMENT EFFICACY. A REVIEW OF THE LITERATURE

The efficacy of physiotherapy or chiropractic treatment for patients with neck pain was analysed by reviewing 27 randomised clinical trials published 196-1995. Three different methods were employed: systematic analyses of; methodological quality; comparison of effect size; analysis of inclusion criteria, intervention and outcome according to The Disablement Process model. The quality of most of the studies was low; only one-third scored 50 or more of a possible 100 points. Positive outcomes were noted for 18 of the investigations, and the methodological quality was high in studies using electromagnetic therapy, manipulation, or active physiotherapy. High methodological quality was also noted in studies with traction and acupuncture, however, the interventions had either no effect or a negative effect on outcome. Pooling data and calculation of effect size showed that treatments used in the studies were effective for pain, range of motion, and activities of daily living. Inclusion criteria, intervention, and outcome were based on impairment in most of the analysed investigations. Broader outcome assessments probably would have revealed relationships between treatment effect and impairment, functional limitation and disability.

Predictive factors for 1-year outcome of low-back and neck pain in patients treated in primary care: comparison between the treatment strategies chiropractic and physiotherapy

Abstract The inability to predict outcome in patients with low back/neck pain leads to inappropriate or unnecessary treatment. The aims of the study were to identify prognostic factors for disability at 1‐year follow‐up in patients with back pain visiting primary care, and to compare the effect of these in two treatment strategies – chiropractic and physiotherapy. Data were taken from a randomised trial on patients with back/neck pain visiting the general practitioner, in which patients were allocated to chiropractic and physiotherapy as primary management. Three hundred and twenty‐three patients, aged 18–60 years, who had no contraindications to manipulation and who had not been treated within the previous month were included in the study. Multiple regression analysis was used to identify prognostic factors. Dependent variables were mean Oswestry score and mean change in Oswestry score at 12‐month follow‐up. The multiple regression analysis revealed five significant (P<0.001–0.01) prognostic factors; duration of current episode, Oswestry score at entry, expectations of treatment, number of localisations, and well‐being. Besides, the regression coefficients for the significant factors were compared between the two treatment strategies. No significant difference in effect or regression coefficients for the prognostic factors were seen between the two treatment strategies. Twelve per cent of the patients had poor prognostic factors (duration≥1 month, more than one localisation, low expectations of treatment and low well‐being) at entry. These patients had a mean Oswestry score above 20% at 1‐year follow‐up. Clinical decision models for the management of patients with back pain visiting primary care that consider prognostic factors need to be implemented and prospectively evaluated.