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PubMed2004

Back schools in occupational health care: design of a randomized controlled trial and cost-effectiveness study.

OBJECTIVE: To describe the design of a randomized controlled trial (RCT), including a cost-effectiveness analysis, comparing high-intensity and low-intensity back schools with usual care in occupational health care. DESIGN: RCT and cost-effectiveness analysis. STUDY POPULATION: Employees sick-listed for a period of 3 to 6 weeks because of nonspecific low back pain. Interventions High-intensity back school treatment consists of a training program based on the principles of cognitive-behavioral therapy. Low-intensity back school treatment is comparable to the original Swedish Back School. Usual care is provided by the occupational physician according to the Dutch guidelines for the occupational health treatment of patients with low back pain. OUTCOME MEASURES: Primary outcome measures are return to work, pain intensity, functional status, and general improvement. Secondary outcome measures are kinesiophobia and pain coping. The cost-effectiveness analysis includes the direct and indirect costs. The outcome measures are assessed before randomization and 3, 6, and 12 months after randomization. CONCLUSION: RCTs of different methodological quality have been conducted to examine the effectiveness of back schools in occupational health care. The large variation in type, content, and intensity of back schools has led to conflicting evidence. Therefore, 2 different forms of back schools are compared. Moreover, this is the first RCT to include a cost-effectiveness analysis comparing low-intensity and high-intensity back schools with usual care in occupational health care.

Adolescent↗
PubMedDate not supplied

Cost-based evaluations of the treatment of back pain: a primer for health-care professionals.

BACKGROUND CONTEXT: There is an extensive literature on the costs of back pain and on cost-based evaluations of the effectiveness of alternative modes of care for back pain. An understanding of the adequacy of a study often requires information that is not part of the experience or training of health-care professionals. The article seeks to provide clinicians with some criteria by which to judge the validity of cost-based evaluations of the treatment and consequences of back pain. PURPOSE: This article is not a comprehensive, critical review of the research literature on the costs of back pain or the relative cost-effectiveness of different methods of care for back pain. It presents, instead, a discussion of some important characteristics of cost-related studies of back pain and some criteria that can be used to evaluate the validity of cost estimates and cost-effectiveness analyses related to back pain. STUDY DESIGN: A guide for the evaluation of cost-based studies of back pain. METHODS: A summary of criteria for the evaluation of the validity of cost-based studies of back pain. RESULTS: Three sets of criteria for evaluation, ranked from most important to least important. CONCLUSIONS: Application of the suggested criteria can enhance the ability of health-care professionals to better understand the limits and relative adequacy of cost-based studies of back pain.

Absenteeism↗
PubMed2006

Changes of low back pain after vascular reconstruction for abdominal aortic aneurysm and high aortic occlusion: a retrospective study.

BACKGROUND: The purpose of the present study is to clarify the influence of acute and chronic interruption of blood flow from lumbar arteries as well as the influence of vascular reconstruction on low back pain, back muscles, and lumbar discs. METHODS: Subjects were 34 patients with AAA in whom vascular reconstruction was performed. A second group was comprised of 9 patients with HAO. The presence of low back pain before surgery and at follow-up examination was retrospectively examined in the AAA group and the HAO group to investigate postoperative changes. The CSA and degeneration of the multifidus muscle and the lumbar discs on magnetic resonance imaging were assessed in the AAA group and control group. RESULTS: Low back pain, significant atrophy, or degeneration of the multifidus muscle or degeneration of the lumbar disc did not newly develop after surgery in the AAA group. These results indicated that acute interruption of lumbar arteries did not induce the development or deterioration of low back pain and organic changes in the back muscles or lumbar discs. The frequency of low back pain before surgery was significantly higher in the HAO group than that in the AAA group. However, the frequency of low back pain after surgery did not differ significantly between the 2 groups because low back pain in the HAO group was improved after surgery. CONCLUSION: The finding that low back pain was improved by merely performing treatment for the vascular system might provide support for the presence of vascular backache.

Acute Disease↗
PubMed1994

Effect of back-strengthening exercise on posture in healthy women 49 to 65 years of age.

OBJECTIVE: To evaluate the effect of back-strengthening exercise on posture in 60 healthy estrogen-deficient women. DESIGN: The 60 study subjects were randomly assigned to either an exercise or a control group, and various factors were assessed at time of enrollment in the study and at 2-year follow-up. MATERIAL AND METHODS: The 32 women in the exercise group were instructed in progressive back-strengthening exercises, whereas the 28 women in the control group had no exercise prescription and were asked to continue their usual physical and dietary activities. At baseline and 2-year follow-up examinations, back extensor strength was measured with a strain-gauge dynamometer, and lateral roentgenograms of the thoracic and lumbar areas of the spine were obtained to measure the angles of thoracic kyphosis, lumbar lordosis, and sacral inclination. The changes in radiographic measurements and back extensor strength were analyzed statistically. RESULTS: Back extensor strength increased significantly in both the exercise and the control groups, but no radiographic measurements were significantly different between these groups. The significant increase in back extensor strength in both groups of healthy women suggested that the original grouping did not accurately reflect the amount of exercise. Thus, the 60 subjects were reclassified for comparison on the basis of increase in back extensor strength--27 with more than or equal to the mean increase of 21.1 kg and 33 with less than 21.1 kg. Furthermore, each of these groups of subjects was subdivided on the basis of degree of thoracic kyphosis. Among the subjects with substantial thoracic kyphosis, those with a significant increase in back extensor strength had a significant decrease in thoracic kyphosis (-2.8 +/- 4.2 degrees; P = 0.041), whereas those with a small increase in strength had a nonsignificant increase in thoracic kyphosis (1.8 +/- 5.3 degrees). The increase in back extensor strength did not seem to affect mild degrees of kyphosis. CONCLUSION: Increasing the back extensor strength in healthy estrogen-deficient women helps decrease thoracic kyphosis.

Aged↗
PubMed2002

[Feasability of a back school assessment programme].

OBJECTIVES: Testing the feasability of a back school assessment programme in two populations of people suffering with chronic low back pain. MATERIAL: Twenty-nine patients were randomly included in a chronic low back pain assessment programme (15 patients waiting for back school and 14 patients after back school). METHODS: The programme was made of the measure of the age, the sex, the body mass index, the pain (VAS, St Antoine Hospitals Pain Questionnaire - SAPQ), the anxiety, the depression, the RIII nociceptive reflex, the fingertip-floor distance, the strength of the flexors and of the extensors of the lumbar spine (CybexR 6000 isocinetic dynamometer), the lumbar function (EIFEL, Dougados), the Dallas self-questionnaire. The Back School Education programme was made of five sessions (information, ergonomics, extension exercises). RESULTS: Comparing the two populations we did not observe significant differences concerning the age, the body mass index, the anxiety and depression levels, the pain (VAS, SAPA, RIII nociceptive reflex), the lumbar stiffness, the lumbar disability, the quality of life; the patients who had achieved back school had a peak torque of the flexors and a ratio flexors/extensors significantly lower. Comparing men and women we observed significant differences in the SAPQ and the muscles strength. The SAPQ was correlated with the depression and anxiety levels, the lumbar disability, the peak torque of the flexors. The VAS was correlated with the age, the lumbar stiffness, the depression level, the peak torque of the flexors. The RIII nociceptive reflex was correlated with the ratio flexors/extensors. CONCLUSION: This study present some biases but this objective assessment of chronic low back pain appeared as feasible. The pain must be investigated in term of intensity, expression, alleviation. The impairment of the flexors muscles in women and after back school has to be confirmed. The different tests are relevant to determinate the efficiency of the back school programmes.

Adult↗
PubMed1998

A prospective study of persistent back pain after pregnancy.

OBJECTIVES: To determine the prevalence of back pain after delivery and its relationship to individual factors. STUDY DESIGN: A cohort of 88 pregnant women, aged 14-46 years, who had suffered from back pain during pregnancy, and delivered at Aydin Maternity Hospital was selected. They had been followed up through pregnancy, and 6 months post partum filled out a questionnaire. The data were analyzed statistically. RESULTS: Follow-up showed that back pain at the time of delivery and 6 months post partum was reported by 59.1% and 43.2% of the women, respectively. The difference in prevalence of back pain between young women and older ones was statistically significant (P=0.000). The number of previous pregnancies increased the risk of back pain (P=0.000), but there was no difference in prevalence of back pain between women with heavy work and without heavy work before pregnancy (P=0.310). Furthermore, women with a history of back pain before pregnancy were found to experience more intense pain at 6 months post partum compared to those without a history of back pain before pregnancy (2.1+/-1.0 and 0.4+/-0.4. respectively. P=0.000). CONCLUSION: These results indicate that pregnant women with a previous history of back pain had a higher prevalence of back pain, especially in young multigravid patients.

Adolescent↗
PubMed2000

A randomized trial of a cognitive-behavioral program for enhancing back pain self care in a primary care setting.

Back pain is a significant health care problem that has been managed unsatisfactorily in primary care settings. Providers typically address medical issues but do not adequately address patient concerns or functional limitations related to back pain. We evaluated a brief intervention for primary care back pain patients designed to provide accurate information about back pain, instill attitudes favorable towards self care, reduce fears and worries, assist patients in developing personalized action plans to manage their back pain, and improve functional outcomes. Patients enrolled in a large health maintenance organization were invited to participate in an educational program to improve back pain self care skills 6-8 weeks after a primary care back pain visit. Patients (n=226) were randomly assigned to a Self Care intervention or to Usual Care, and were assessed at baseline, 3-, 6-, and 12-months. The intervention involved a two-session Self Care group and an individual meeting and telephone conversation with the group leader, a psychologist experienced in chronic pain management. The intervention was supplemented by educational materials (book and videos) supporting active management of back pain. The control group received usual care supplemented by a book on back pain care. Participants assigned to the Self Care intervention showed significantly greater reductions in back-related worry and fear-avoidance beliefs than the control group. Modest, but statistically significant, effects on pain ratings and interference with activities were also observed.

Adult↗
PubMed1997

The prevalence and cause of occupational back pain in Hong Kong registered nurses.

It is well known that many patient-oriented tasks contribute to occupational back pain in nurses and this is borne out by previous studies. In order to know whether the incidence of back pain and the contributing factors are the same in Hong Kong, a descriptive study was adopted to investigate the situation locally. This study explored the prevalence and perceived contributing factors of back pain, utilizing a non-experimental survey approach. Baseline data for this study were gathered by means of a questionnaire. The questionnaire elicited characteristics of the subjects' history and contributing factors to back pain. Of 47 nursing staff at an acute care hospital, the reported occurrence of some form of back pain during their career was found to be 80.9%. Approximately one-third of nurses with back-pain experienced pain at least once a month. The top two dynamic factors contributing to back pain were lifting patients and transferring patients. Meanwhile, stooping was identified as the most common static factor contributing to back pain. In addition of those who had experienced some form of back pain, 92.1% stated that they have never reported their back pain to their employers. Contributing factors such as transferring patients from bed to chair and lifting patients within bed without assistance indicate poor practice which should be eliminated by the existence of continuing in-service education.

Adult↗
PubMed2002

Back pain in pregnancy--magnetic resonance imaging correlation.

AIM: To study the relationship of disk abnormality and signal changes of the uterine cervix on magnetic resonance imaging (MRI) with back pain in pregnancy at 36-39 weeks of gestation. MATERIAL AND METHODS: One hundred and five pregnant Chinese women with previous Caesarean section at 36-39 weeks gestation undergoing magnetic resonance pelvimetry performed for a study for trial of vaginal delivery were questionnaired for back pain. Sagittal T2-weighted images were analysed for intervertebral disk abnormality, and signal intensity of the uterine cervix on the same sagittal images. The findings on MRI were correlated with back pain. RESULTS: Seventy-three (70%) of the pregnant women had back pain. Disk bulge or prolapse were infrequent but correlated significantly with the presence of back pain (P=0.02). Women with back pain in the current pregnancy tended to have a higher signal intensity of the uterine cervix compared with those without (P=0.006). Women with a history of back pain also had higher cervical signal intensity compared with those without (P=0.02). CONCLUSION: Disk bulge or prolapse was associated with back pain in pregnancy but were relatively infrequent. The significant correlation of high signal intensity in the uterine cervix and back pain suggested that soft tissue laxity may be a more important cause of back pain in pregnancy than disk bulge or prolapse.

Adult↗
PubMedDate not supplied

A descriptive study of medical and chiropractic patients with chronic low back pain and sciatica: management by physicians (practice activities) and patients (self-management).

BACKGROUND: A practice-based study of ambulatory patients with low back pain noted a long-term outcome advantage for self-referred chiropractic (DC) patients over medical (MD) patients within a subgroup of patients with chronic low back pain and radiating pain below the knee. The frequency of self-care education by physicians in both provider cohorts coupled with current thinking on management of chronic low back pain led to an exploration and description of physicians' noncore practice activities and patients' self-management attitudes and behaviors. METHODS: A longitudinal, practice-based, observational study was undertaken in 14 general practice and 51 chiropractic community-based clinics. We enrolled 2945 consecutive patients with ambulatory low back pain of mechanical origin; of these, 268 comprised the subgroup of patients with chronic low back pain and radiating pain below the knee. The patients' low back status was followed for 1 year. Data on physicians' practice activities were obtained from doctor questionnaires completed at each patient visit and from chart abstraction. Patient data obtained from self-administered questionnaires at enrollment included sociodemographics, complaint characteristics, health status, and health encounter preferences. Questionnaires mailed at 2 weeks, 1 month, 3 months, 6 months, and 12 months collected data on low back complaint status and satisfaction with treatment. At 1 to 3 years follow-up, mailed questionnaires collected data on patients' self-management attitudes and behaviors. RESULTS: Physicians' core practice activities were as expected. Exercise plans and self-care education (>55%) were conspicuous in the frequency of their use in the DC cohort. MD patients appeared to rely more on family and friends for support during periods of back trouble. DC patients were characterized by greater self-efficacy motivation (P = .000). Both groups showed evidence of self-care activities during and between bouts of back pain, although MD patients were far more likely to choose bed rest (P = .007). CONCLUSIONS: The chiropractic encounter may have enhanced patients' self-efficacy motivation, leading to better coping abilities and better pain and disability outcomes. Understanding, respecting, and capitalizing on the role and influence of psychosocial factors can help all physicians become more effective healers and counselors for their patients with back pain.

Adult↗
PubMed2002

Can custom-made biomechanic shoe orthoses prevent problems in the back and lower extremities? A randomized, controlled intervention trial of 146 military conscripts.

BACKGROUND: Shock-absorbing and biomechanic shoe orthoses are frequently used in the prevention and treatment of back and lower extremity problems. One review concludes that the former is clinically effective in relation to prevention, whereas the latter has been tested in only 1 randomized clinical trial, concluding that stress fractures could be prevented. OBJECTIVES: To investigate if biomechanic shoe orthoses can prevent problems in the back and lower extremities and if reducing the number of days off-duty because of back or lower extremity problems is possible. DESIGN: Prospective, randomized, controlled intervention trial. STUDY SUBJECTS: One female and 145 male military conscripts (aged 18 to 24 years), representing 25% of all new conscripts in a Danish regiment. METHOD: Health data were collected by questionnaires at initiation of the study and 3 months later. Custom-made biomechanic shoe orthoses to be worn in military boots were provided to all in the study group during the 3-month intervention period. No intervention was provided for the control group. Differences between the 2 groups were tested with the chi-square test, and statistical significance was accepted at P <.05. Risk ratio (RR), risk difference (ARR), numbers needed to prevent (NNP), and cost per successfully prevented case were calculated. OUTCOME VARIABLES: Outcome variables included self-reported back and/or lower extremity problems; specific problems in the back or knees or shin splints, Achilles tendonitis, sprained ankle, or other problems in the lower extremity; number of subjects with at least 1 day off-duty because of back or lower extremity problems and total number of days off-duty within the first 3 months of military service because of back or lower extremity problems. RESULTS: Results were significantly better in an actual-use analysis in the intervention group for total number of subjects with back or lower extremity problems (RR 0.7, ARR 19%, NNP 5, cost 98 US dollars); number of subjects with shin splints (RR 0.2, ARR 19%, NNP 5, cost 101 US dollars); number of off-duty days because of back or lower extremity problems (RR 0.6, ARR < 1%, NNP 200, cost 3750 US dollars). In an intention-to-treat analysis, a significant difference was found for only number of subjects with shin splints (RR 0.3, ARR 18%, NNP 6 cost 105 US dollars), whereas a worst-case analysis revealed no significant differences between the study groups. CONCLUSIONS: This study shows that it may be possible to prevent certain musculoskeletal problems in the back or lower extremities among military conscripts by using custom-made biomechanic shoe orthoses. However, because care-seeking for lower extremity problems is rare, using this method of prevention in military conscripts would be too costly. We also noted that the choice of statistical approach determined the outcome.

Adolescent↗
PubMed2005

Back pain and decline in lower extremity physical function among community-dwelling older persons.

BACKGROUND: Little is known regarding the longitudinal effects of back pain on physical function among older persons. We sought to determine whether back pain leading to activity restriction (i.e., restricting back pain) is associated with decline in lower extremity physical function among community-dwelling older persons. METHODS: In this prospective study with an 18-month follow-up period, participants (N = 659) were aged 70 years or older and independent in bathing, dressing, transferring, and walking at baseline. Restricting back pain, defined as staying in bed for at least one-half day or cutting down on one's usual activities due to back pain, was ascertained during monthly telephone interviews. Lower extremity physical function was assessed using three timed, performance-based tests (rapid gait, chair stands, and foot taps) at baseline and 18 months. Decline in lower extremity physical function was defined as an increase in timed scores on these tests between the baseline and 18-month assessments. RESULTS: The mean (standard deviation) number of months with restricting back pain was 1.3 (2.3); 364 (55%) participants reported 0 months, 209 (32%) reported 1-3 months, and 86 (13%) reported 4 or more months. After adjustment for baseline performance score and other covariates, the number of months with restricting back pain was independently associated with worsening rapid gait (p <.001), chair stand (p =.030), and foot tap (p <.001) performance. The deleterious effects of the "exposure" were limited to participants with 4 months of restricting back pain. CONCLUSIONS: Restricting back pain is independently associated with decline in lower extremity physical function among community-dwelling older persons. Treatment of restricting back pain may help to decrease functional decline in this population.

Aged↗
PubMed2004

A school-based survey of recurrent non-specific low-back pain prevalence and consequences in children.

The aim of this investigation was to provide evidence of the prevalence and consequences of recurrent low-back pain in children from Northwest England. A cross-sectional survey was conducted involving a standardized questionnaire with established reliability and validity. A cross-sectional sample of 500 boys (n = 249) and girls (n = 251) aged between 10 and 16 years participated in the study. Average lifetime prevalence of low-back pain was 40.2% [95% confidence interval (CI) = 38.7-41.6]. Most cases of low-back pain were acute episodes that did not lead to disabling consequences. In contrast, 13.1% (95% CI = 12.5-13.7) experienced recurrent low-back pain that led to disabling consequences; 23.1% visited a medical practitioner, 30.8% experienced loss of physical activity/sports and 26.2% had been absent from school because of low-back pain. Recurrent low-back pain was particularly evident during late adolescence where one in five children were cases. The health education implications of low-back pain in children are discussed. It was concluded that low-back pain is a common complaint during childhood, although most cases are acute episodes that represent little health consequence. In contrast, some children experience recurrent low-back pain that can lead to disabling consequences. Future research should focus on recurrent low-back pain cases since they often led to disabling consequences.

Adolescent↗
PubMed1985

Application of 24-hour burst TENS in a back school.

The Back School program consists of exercises and education designed to reduce back pain. Sixty-six percent of the patients had too much back pain to participate. The purpose of this clinical report is to describe how 24-hour burst transcutaneous electrical nerve stimulation (TENS) treatment enabled these patients with severe back pain to participate in the Back School. Patients recovering from a laminectomy, chemonucleolysis, or scoliosis surgery were used to determine that 24-hour burst TENS was the most effective TENS protocol for reducing pain. Twenty-four-hour burst TENS was then prescribed for 129 patients with severe back pain to enable them to complete the Back School program. Eighty percent of these patients returned to their usual activities within 12 months. The Back School program has been shown to be an effective and safe treatment for back pain, and 24-hour burst TENS treatment allows patients with severe back pain to participate in it.

Back Pain↗
PubMed1996

A prospective controlled study of low back school in the general population.

There are no data on the efficacy of a back school in primary prevention of back pain in the general population or on the characteristics of the population who volunteers. After announcement in the local press, 494 healthy adults volunteered and paid for a back school course in Switzerland. A total of 371 controls were matched for sex, age, profession, nationality and back pain. A statistically significant decrease in numbers of doctor's visits was found by the participants during the following 6 months compared with the controls. However, there were no significant between-group difference in the four remaining parameters (presence and intensity of back pain, drug intake and sick leave). Three-quarters of participants changed their attitudes after the back school. Volunteering for a back pain prevention programme was associated with the presence of back pain problems. Reasons for volunteering are further discussed. Overall, the results of this study showed that a back school for the general population may not solve the problem of low back pain, but improves self-help in a subgroup of the population.

Adult↗
PubMed2001

The effects of back schools--a meta-analysis.

Back schools are educational programmes for the prevention and rehabilitation of back pain. A quantitative review (meta-analysis) was performed to synthesize the existing evidence on their effectiveness, for different outcome criteria and time categories. On the basis of a systematic literature research, 18 controlled back school studies with a total of 1682 participants could be included in the meta-analysis. Effect sizes that compared back school patients with patients in a control group were calculated for 14 outcome criteria and four time categories. Effectiveness of back schools was shown for the time period within 6 months of intervention. However, effects for the 14 examined criteria revealed large differences: in contrast to the strong effects on correct back posture and movements and on knowledge of back school contents, the intervention had only small effects on health economic variables (e.g. utilization of the health care system) and no effects on clinical variables (e.g. pain intensity). With regard to the time period following the 6 months after intervention, the analysed data does not strongly support the effectiveness of back schools. It is concluded that the effectiveness of back school intervention depends on the outcome criterion and time of measurement. The results suggest that the concept of back school programmes should be improved and systematically re-evaluated.

Adolescent↗
PubMed1995

The effects of spinal flexion and extension exercises and their associated postures in patients with acute low back pain.

STUDY DESIGN: A prospective randomized clinical trial compared the effects of flexion and extension back exercises and postures among soldiers with acute low back pain. OBJECTIVE: To compare the immediate effects of back exercise on functional status, spinal mobility, straight leg raising, pain severity, and treatment satisfaction, and to determine whether spinal exercise during the acute stage of low back pain reduces recurrent episodes of low back pain. SUMMARY OF BACKGROUND DATA: Conflicting reports exist concerning the efficacy of spinal flexion and extension exercises in patients with low back pain of varying duration. Poor study design and lack of functional outcomes characterize many of these studies. METHODS: One-hundred-forty-nine subjects with acute low back pain received flexion exercise and posture (n = 57), extension exercise and posture (n = 62), or no exercise or posture (n = 30) for 8 weeks. Outcomes were assessed 1, 2, 4 and 8 weeks after treatment onset. A questionnaire assessed the recurrence of low back pain 6-12 months after study entry. RESULTS: Flexion and extension exercise groups did not differ in any outcome over 8 weeks. After 1 week, both exercise groups had reduced disability scores, a higher proportion returning to work, and fewer subjects with a positive straight-leg raise compared with the control group. There was no difference among groups regarding recurrence of low back pain after 6-12 months. CONCLUSIONS: There was no difference for any outcomes between the flexion or extension exercise groups. However, either exercise was slightly more effective than no exercise when patients with acute low back pain were treated.

Acute Disease↗
PubMed1995

Psychologic distress and low back pain. Evidence from a prospective study in the general population.

STUDY DESIGN: The present is a prospective population-based cohort study. OBJECTIVES: To determine whether psychologic distress in patients free of low back pain predicts future new episodes of such pain. SUMMARY OF BACKGROUND DATA: An associating between symptoms of depression and anxiety and low back pain has been described in cross-sectional studies. It is unclear whether this represents cause or effect or whether it is found only in chronic pain sufferers attending specialist clinics. There is a need to investigate this prospectively in the general population. METHODS: The study population was 4501 adults aged 18-75 years who responded to a questionnaire survey mailed to all those registered with two family practices in the United Kingdom. The survey inquired about low back pain during the previous month and included the 12-item General Health Questionnaire, a validated schedule for measuring psychologic distress in the general population. New episodes of low back pain during the 12 months after the survey were identified by two methods--continuous monitoring of all primary care consulters and a second postal survey at the end of the 12-month period to determine occurrences for which consultation had not been sought. RESULTS: Among 1638 subjects free of current low back pain in the baseline survey, the likelihood of developing a new episode of nonconsulting low back pain was higher among those with General Health Questionnaire scores in the upper third of the range compared with the lower third (adjusted odds ratio, 1.8 [1.4, 2.4]). This could not be explained either by age and gender differences or by general physical health. The increased risk persisted when analysis was restricted to those who at baseline could not recall ever having had low back pain in the past and to those with full-time employment. CONCLUSION: Symptoms of psychologic distress in individuals without back pain predict the subsequent onset of new episodes of low back pain. We calculate from these data that the proportion of new episodes of low back pain that might be attributable to such psychologic factors in the general population is 16%.

Adolescent↗