Prevalence and Risk Factors Associated with Chronic Occupational Low Back Pain among Healthcare Professionals Working at Hospitals: Exploratory Survey Study

Objective  This study aimed to describe the methodological process for developing a questionnaire to identify the prevalence and risk factors for chronic occupational low back pain in healthcare professionals working at hospitals. Method  An exploratory crossectional survey study was carried out in Belo Horizonte, MG, Brazil, and its metropolitan region, in two stages. Initially, the authors prepared a questionnaire based on the Roland Morris disability questionnaire and sent it to a committee of low back pain specialists for validation using the Delphi technique. The second stage consisted of sending the final questionnaire to health professionals working in a hospital environment for at least 2 years and presenting chronic low back pain for at least 3 months. Results  Validation occurred in two rounds of questionnaire adjustments by a panel consisting of physical therapists and physician experts in the field (orthopedists with more than 3 years of experience). Both rounds had 13 participants. The questionnaire initially consisted of 27 items, and, after validation, it had 19 items. The study included 65 subjects, with an average age of 40.91 years old and an average time working at a hospital of 40 hours per week. The total sample had 76.9% of physicians, 10.8% of physical therapists, and 12.3% of nurses or nursing technicians. Most (52.3%) subjects reported staying in uncomfortable positions affecting the lower back for 5 to 10 hours per day. Conclusion  We developed and validated, using the Delphi technique, a questionnaire on the prevalence and risk factors associated with chronic occupational low back pain among healthcare professionals working at hospitals. This unprecedented tool can benefit the population studied since the questionnaires currently used to evaluate chronic low back pain are not specific for investigating the occupational cause of this condition.

An Exploration of the Influence of Non-Biomechanical Factors on Lifting-Related LBP

Objective: The primary objective was to compare non-biomechanical factors between manual workers with and without a history of LBP related to lifting. A secondary objective was to investigate associations between the change in pain intensity during repeated lifting (termed pain ramp) and non-biomechanical factors tested in the LBP group. Methods: Manual workers currently in lifting occupations with and without a history of lifting-related LBP were recruited (21 LBP and 20 noLBP) and took part in a repeated (100) lift task. A series of non-biomechanical factors, including psychological, work-related, lifestyle, whole health and psychophysical factors, were collected. Psychophysical factors (pressure pain thresholds (PPTs) and fatigue) were also measured at different time points. Associations between pain ramp during lifting and non-biomechanical factors were investigated with linear regression. Results: The LBP group reported worse perceived sleep quality, more musculoskeletal pain sites other than LBP and greater symptoms related to gastrointestinal complaints and pseudo-neurology compared to the group with no history of LBP. The group with LBP were also slightly more worried about the lifting task and felt more fatigued at the end of the lifting task. The feeling of fatigue during lifting was positively associated with pain ramp in the LBP group. Anxiety and gastrointestinal complaints were weakly negatively associated with pain ramp during lifting. Conclusions: The group differences of poorer perceived sleep, greater non-specific health complaints, slightly more worry about the lifting task and more perceived fatigue in the LBP group highlight the complex and multi-factorial nature of LBP related to lifting. The feeling of fatigue was positively associated with pain ramp in the LBP group, suggesting a close relationship with pain and fatigue during lifting that requires further exploration.

Psychosocial work characteristics and low back pain in daycare (nursery) workers in Japan: a prospective cohort study

BACKGROUND

Low back pain (LBP) is one of the most common musculoskeletal problems affecting daycare (nursery) workers. We aimed to identify the psychosocial factors influencing LBP in daycare workers.

METHODS

We conducted a prospective cohort study with a one-year observation period. The baseline sample was a convenience sample of 444 daycare workers from 34 daycare facilities in Nagoya, Japan, and its suburbs. All the data were collected through a questionnaire survey. The question "Where are you currently feeling LBP?" was used to determine whether the subjects suffered from LBP. We examined the prospective relationships of the psychosocial work characteristics, i.e., high job strain, low social support, effort-reward imbalance, and overcommitment, at baseline and LBP after one year. We used multiple logistic regression analyses to calculate the odds ratios of psychosocial work characteristics for the persistence and onset of LBP, adjusted for age, sex, body mass index, smoking, employment status, occupation, and working schedule.

RESULTS

At baseline, 270 (60.8%) subjects suffered from LBP. Of 208 who also gave information on LBP one year later, 176 (84.6%) suffered from the persistence of LBP. Low social support at baseline was significantly related to persistent LBP one year later. The incidence of persistent LBP was 89.9% and 80.0% among those with and without low social support at baseline, respectively. The adjusted odds ratio (95% confidence interval) of low social support at baseline for the persistence of LBP was 2.43 (1.01-5.87). Of 150 who were without LBP at baseline and provided information on LBP one year later, 45 (30.0%) suffered from the onset of LBP. None of the psychosocial work characteristics showed significant relationships with the onset of LBP one year later.

CONCLUSION

Low social support was related to the persistence, but not to the onset of LBP in a prospective cohort analysis among daycare workers in Japan. High job strain, ERI, or overcommitment did not show a significant prospective effect on LBP.

Do men and women have different musculoskeletal symptoms at the same musculoskeletal discomfort level?

Owing to biological and social factors, illness-related musculoskeletal symptoms tend to vary between men and women. However, in the past, conceptualised discomfort metrics were applied uniformly to both genders. This study aimed to develop a scale to measure musculoskeletal discomfort that compares the symptoms between men and women. The scale aimed to determine the gender-based response patterns related to symptoms. A total of 707 men and 1302 women reported their symptoms on a body map. Factor analysis and item response theory were used to differentiate the identified symptoms in the construction of a musculoskeletal discomfort scale. Differences in work exposure appeared to explain the symptom patterns between men and women. The scale had eight levels, and it was found that at the same level of discomfort, men and women reported symptoms in different body regions.Practitioner summary: On this discomfort scale, the response patterns of men and women were categorised into eight levels. Symptoms differed by gender at the same musculoskeletal discomfort level. This is in contrast to previous studies in which scales were devised without considering differences between the genders.Abbreviations: WMSDs: work-related musculoskeletal disorders; BMI: body mass index; FA: factor analysis; IRT: item response theory; KMO: Kaiser-Meyer-Olkin; BST: Bartlett's test of sphericity; F: factor loading; h2: communality; α: Cronbach's alpha; ωt: McDonald's omega; ai: parameters of discrimination of the items; bik: parameters of difficulty of response categories; θj: latent trait; RMSEA: root mean square error of approximation; CFI: comparative fit index; TLI: Tucker-Lewis index; odu: musculoskeletal discomfort units; RA: rarely; OF: often; AL: always.

Evaluating Different Measures of Low Back Pain Among U.S. Manual Materials Handling Workers: Comparisons of Demographic, Psychosocial, and Job Physical Exposure

OBJECTIVE

To examine differences in demographic, psychosocial, and job physical exposure risk factors between multiple low back pain (LBP) outcomes in a prospective cohort of industrial workers.

BACKGROUND

LBP remains a leading cause of lost industrial productivity. Different case definitions involving pain (general LBP), medication use (M-LBP), seeking healthcare (H-LBP), and lost time (L-LBP) are often used to study LBP outcomes. However, the relationship between these outcomes remains unclear.

METHOD

Demographic, health status, psychosocial, and job physical exposure risk factors were quantified for 635 incident-eligible industrial workers. Incident cases of LBP outcomes and pain symptoms were quantified and compared across the four outcomes.

RESULTS

Differences in age, gender, medical history, and LBP history were found between the four outcomes. Most incident-eligible workers (67%) suffered an LBP outcome during follow-up. Cases decreased from 420 for LBP (25.4 cases/100 person-years) to 303 for M-LBP (22.0 cases/100 person-years), to 151 for H-LBP (15.6 cases/100 person-years), and finally to 56 for L-LBP (8.7 cases/100 person-years). Conversely, pain intensity and duration increased from LBP to H-LBP. However, pain duration was relatively lower for L-LBP than for H-LBP.

CONCLUSION

Patterns of cases, pain intensity, and pain duration suggest the influence of the four outcomes. However, few differences in apparent risk factors were observed between the outcomes. Further research is needed to establish consistent case definitions.

APPLICATION

Knowledge of patterns between different LBP outcomes can improve interpretation of research and guide future research and intervention studies in industry.

Prevalence of Pain and Its Risk Factors Among ICU Personnel in Tertiary Hospital in China: A Cross-Sectional Study

Background

Although pain is commonly observed among medical staff, studies on pain among intensive care unit personnel are uncommon, especially intensive care unit (ICU) doctors and workers. Moreover, few studies have focused on the prevalence of pain and the associated factors.

Purpose

The aim of this study was to estimate the prevalence of pain among ICU personnel (including doctors, nurses and workers) and explore the risk factors for their pain.

Methods

We conducted an online survey that included sociodemographic and work-related items and questions about pain, ergonomics, and psychological factors. We used the short version of the validated Depression-Anxiety-Stress Scale (DASS-21) to assess the relationship between pain and mental disorders. All ICU personnel at West China Hospital of Sichuan University participated in this study.

Results

A total of 356 ICU personnel were included in the final analysis. The prevalence of pain was 72.2% among ICU nurses, 64.4% among ICU doctors and 52.9% among ICU workers. The most frequent location of pain was the lower back among nurses (65.9%) and workers (47.1%) and the neck among doctors (49.1%). The factors contributing to pain among ICU personnel were bending or twisting the neck, high levels of psychological fatigue, low self-perceived health status, female sex and high body mass index (BMI). Moreover, participants with pain indicated significantly higher depression (p ≤ 0.001), anxiety (p ≤ 0.001), and stress levels (p = 0.002) than those without pain.

Conclusion

This study indicates that ICU personnel exhibit a high prevalence of pain. Many factors, especially psychosocial and ergonomic factors, contribute to pain levels among ICU personnel and the poorer mental health levels observed in those experiencing pain. Therefore, disease prevention and health promotion measures are needed to protect the health of ICU personnel.

Assessment of the influence of psychosocial factors on musculoskeletal disorder symptom intensity

BACKGROUND

Previous studies have observed that psychosocial factors are associated with an increase in work-related musculoskeletal disorders (WMSDs) in European countries. However, the influence of psychosocial factors on the WMSD symptoms has not been studied in detail. Additionally, working conditions differ between developing and developed countries.

OBJECTIVE

In this study, the influence of psychosocial factors on WMSD symptoms among men and women in the footwear industry in northeastern Brazil is investigated.

METHODS

A questionnaire survey was conducted to evaluate workers' perceptions of psychosocial factors and WMSD symptoms. The influence of psychosocial factors on WMSD symptom trends was observed through ordinal logistic regression models.

RESULTS

It was found that different psychosocial factors are related to WMSD symptom intensification. Factors such as "job insecurity" and "low social support," which are not associated with the worsening of WMSD symptoms in developed countries, showed a noticeable influence in the sample analyzed.

CONCLUSION

These findings may be associated with differences in working conditions and economic problems in developing countries, suggesting that some psychosocial factors have a different effect on workers' perceptions in developing countries.

The effect of work-related psychosocial stressors on musculoskeletal disorder symptoms in hospital attendants

BACKGROUND

Psychosocial stress at work is an important issue among hospital attendants.

OBJECTIVE

This study aimed to examine psychosocial stressors in the work environment and assess their impacts on WMSD symptoms among hospital attendants in Shiraz, southern Iran.

METHODS

This cross-sectional study was conducted on 198 hospital attendants from Shiraz. The study data were collected using a basic demographic questionnaire, Nordic Musculoskeletal Questionnaire (NMQ), the Persian version of Effort-Reward Imbalance Questionnaire (F-ERIQ), and an individual risk assessment (Evaluación del Riesgo Individual [ERIN]). The data were entered into SPSS version 16 and analyzed using Mann-Whitney U, Chi-square, and Spearman's correlation tests.

RESULTS

The prevalence of WMSD symptoms was 29.8% in the lower back, 25.3% in knees, and 20.7% in ankles/feet. Posture analysis by the ERIN technique demonstrated that 95.5% of the postures were high risk for WMSDs. F-ERIQ identified that 83.4% of the hospital attendants belonged to the "1 < ER-ratio" category. Besides, the "effort" subscale of the F-ERIQ was significantly associated with reporting of MSD symptoms in the neck, shoulders, wrists/hands, and lower back. In addition, a significant correlation was observed between effort (r = 0.367, p = 0.028), esteem (r = -0.273, p = 0.041), security (r = -0.253, p = 0.045), and over-commitment (r = 0.301, p = 0.019) and the total score of the ERIN technique.

CONCLUSION

Intervention programs and coping strategies for reduction of work-related stress and, subsequently, prevention of WMSD symptoms are recommended among hospital attendants.

Psychosocial Factors and Low Back Pain Outcomes in a Pooled Analysis of Low Back Pain Studies

OBJECTIVE

Assessment of possible relationships between work-related psychosocial measures and self-reported low back pain (LBP) outcomes in a large pooled dataset of 1929 participants from 82 facilities in the United States.

METHODS

Pooled data from three prospective cohort studies were used to calculate odds ratios (OR) and 95% confidence intervals (95% CI) for relationships between psychosocial factors and the LBP outcomes. Personal and occupational confounders were controlled for in adjusted Logistic regression models.

RESULTS

Supervisor support and job satisfaction were significantly (P < 0.05) related to all three LBP outcomes. Other psychosocial factors were significantly (P < 0.05) associated with at least one of the LBP outcomes. Adjusted ORs ranged from approximately 1.50 to 3.50 for most associations.

CONCLUSIONS

There is a significant relationship between work-related psychosocial measures and LBP outcomes.

Low back pain in emergency ambulance workers in tertiary hospitals in China and its risk factors among ambulance nurses: a cross-sectional study

OBJECTIVE

Low back pain (LBP) could cause serious consequences and has been shown to be prevalent among emergency ambulance workers. Studies on the prevalence of and risk factors for LBP among emergency ambulance workers are scarce in China. The study aimed to determine the prevalence of LBP among ambulance workers, including doctors, nurses and drivers, and to explore the risk factors for ambulance nurses' chronic LBP (lasting for at least 3 months).

DESIGN

Cross-sectional study.

SETTING

Emergency ambulance systems from 38 tertiary hospitals in Shandong, China were selected by random cluster sampling.

PARTICIPANTS

A total of 1560 ambulance workers completed the study.

OUTCOME MEASURES

A paper-based questionnaire that included the Nordic Musculoskeletal Questionnaire, which evaluated LBP, the Dutch Musculoskeletal Questionnaire, which assessed ergonomic factors, and the Job Content Questionnaire, which assessed stress, was used. Multivariate logistic regression analysis was conducted to quantify the association of potential risk factors with chronic LBP among ambulance nurses.

RESULTS

The 1 year prevalence of LBP lasting for at least 24 hours, 7 days and 3 months was 86.1%, 50.6% and 21.1%, respectively, among 498 ambulance nurses; 70.5%, 36.4% and 15.8% among 519 doctors; and 57.5%, 23.8% and 12.3% among 543 drivers. The factors contributing to chronic LBP among ambulance nurses were the frequent bending of the trunk, heavy or awkward lifting, shift work, low job satisfaction, high psychological fatigue, high psychological job demand, low job control, low supervisor support, older age, female sex and obesity.

CONCLUSIONS

LBP was more prevalent among ambulance nurses than among ambulance doctors and drivers. Many factors, especially psychosocial and ergonomic factors, contributed to ambulance nurses' chronic LBP. Comprehensive measures might be needed to control LBP.

Factors predisposing to work-related lower back pain in automobile industry workers

Objective. This study aimed to assess the presence of lower back pain (LBP) in automobile industrial workers and correlate it with the factors known to be contributing to the development of work-related LBP. Method. Post ethical approval, an analytical cross-sectional assessment was conducted for a correlation study on 317 workers from different automobile industries, garages and service centres, who were then assessed by Nordic musculoskeletal questionnaire for the presence of LBP. Their pain intensity was assessed using a numerical rating scale, their core strength with a pressure biofeedback unit, their flexibility via the sitting and reach test and their work posture with the rapid entire body assessment tool. Pain intensity was correlated with core strength, flexibility and posture in all of the workers using Spearman's correlation coefficient r with α set at p ≤ 0.05 at a 95% confidence interval. Results. There was no significant correlation of the pain intensity with the core strength (r = 0.052, p = 0.424), flexibility (r = 0.020, p = 0.755) or posture (r = 0.002, p = 0.974). Conclusion. The present study indicates that internal factors like core strength and flexibility, and work postures have no correlation with intensity and severity of LBP in automobile industry workers.

Feasibility, Safety, and Efficacy of Subcutaneous Peripheral Nerve Field Stimulation for the Treatment of Refractory Low Back Pain: A Two-year Single-center Study

Chronic low back pain (CLBP) is challenging to treat. Minimal invasive neurostimulation therapies, such as subcutaneous peripheral nerve field stimulation (SPNS), improve pain relief and quality of life. The goal of the present study was to assess the usefulness, safety, and efficacy of SPNS in patients with CLBP. Twenty-six consecutive patients with CLBP were prospectively included in the study. For trial neurostimulation, two electrodes were implanted vertically at a depth of 1 cm into the subcutaneous tissue, ≤10 cm from the region of maximum pain. Trial neurostimulation was performed in all patients for 14 days. A successful outcome was defined as at least 50% pain relief. To monitor the effects of permanent neurostimulation, the Visual Analog Scale (VAS), the Oswestry Disability Index (ODI), and quality of life (EQ-5D-3L) were scored preoperatively and at 6-month and 24-month follow-ups. Thirteen patients responded to trial stimulation and had a permanent neurostimulator implanted. The use of pain medication, including opioid analgesics, was reduced in 92% of patients after 24 months. VAS, ODI, and EQ-5D-3L scores were significantly improved in these patients at the 24-month follow-up. The complication rate was 23% (3/13 patients). In non-responders, VAS and ODI at 24 months dropped significantly as well but the decrease was less pronounced compared to responders and had not led to a decrease in pain medication. SPNS is a novel, safe, and effective treatment for CLBP and may have advantages over interventional treatments including intrathecal therapy and spinal cord stimulation.

The Persian Version of Örebro Musculoskeletal Pain Screening Questionnaire: Translation and Evaluation of its Psychometric Properties

Background:

Screening of psychosocial risk factors for chronic low back pain (LBP) is essential. The Örebro Musculoskeletal Pain Screening Questionnaire (ÖMPSQ) is one of the most recognized and widely used instruments for this purpose. This study aimed to translate the ÖMPSQ into Persian, to adapt it for Iranian culture, and to investigate its psychometric properties.

Methods:

Using a linguistic methodology, the ÖMPSQ was translated into Persian according to the World Health Organization guideline. A total of 106 patients with LBP participated in the study. Internal consistency and test-retest reliability were evaluated. Concurrent validity was estimated with Pearson's correlation between the ÖMPSQ and short form health survey (SF-12), Hospital Anxiety and Depression Scale (HADS), and visual analog scale (VAS). Factor analysis was used to evaluate dimensionality.

Results:

The content validity index was 0.80. The instrument had a good test-retest reliability (intraclass correlation coefficient = 0.82) and internal consistency (Cronbach's α =0.82). Factor analysis indicates that factorial structure of Persian version was similar to original questionnaire. There was a significant correlation (r = 0.252–0.639, P < 0.01) between VAS score and all the ÖMPSQ domains. Physical component summary of SF-12 was positively correlated with miscellaneous domain (r = 384, P < 0.05) and negatively correlated with psychology domain of ÖMPSQ (r = −0.364, P < 0.05). A significant correlation between total score and anxiety component of HADS and psychology domain of ÖMPSQ was found (r = 0.49, P < 0.01 and r = 0.442, P < 0.05, respectively). Correlations between the ÖMPSQ and SF-12 and HADS and VAS indicate acceptable concurrent validity.

Conclusions:

The Persian version of ÖMPSQ was as a valid and reliable instrument and also a good cross-cultural equivalent for original English version.

Prevalence and social burden of active chronic low back pain in the adult Portuguese population: results from a national survey

To determine the prevalence of active chronic low back pain (CLBP) in the adult Portuguese population; to compare the active CLBP population with the population without CLBP; and to explore factors associated with active CLBP. The present study was conducted under the scope of EpiReumaPt a population-based study. Active CLBP was self-reported and considered if present on the day of the interview and for ≥90 days. Prevalence estimates were calculated. Association of active CLBP with quality of life, functional ability and healthcare consumption were evaluated. Factors associated with active CLBP were identified through logistic regression. Among 10.661 EpiReumaPt subjects, 1487 self-reported active CLBP. The prevalence of active CLBP was 10.4 % (95 % CI 9.6; 11.9 %). After adjustment, active CLBP subjects had a higher likelihood for anxiety symptoms (OR 2.77), early retirement due to disease (OR 1.88) and more physician visits (β = 2.65). Factors significantly and independently associated with the presence of active CLBP were: female gender (OR 1.34), overweight/obesity (OR 1.27), presence of self-reported rheumatic musculoskeletal disease (RMD) (OR 2.93), anxiety symptoms (OR 2.67), age (OR 1.02) and higher number of self-reported comorbidities (OR 1.12). Active CLBP is highly prevalent in the Portuguese population and is associated with disability and with a high consumption of healthcare resources. Female gender, older age, anxiety symptoms, overweight/obesity, the presence of other RMD and the number of comorbidities were independently associated with the presence of active CLBP. These factors should be taken into account when new cohort prospective studies will be developed.

Evaluation of the Relationship Between Musculoskeletal Discomforts and Occupational Stressors Among Nurses

BACKGROUND

Stress in nurses may increase the prevalence of musculoskeletal discomforts.

AIM

The aim of this study was to determine the prevalence of musculoskeletal discomforts and job stress among nurses and to investigate the association between musculoskeletal discomforts and occupational stressors.

MATERIALS AND METHODS

In this cross-sectional study, 144 nurses in one of the main referral hospitals of Tehran-Iran were randomly selected and studied. Data were collected by HSE job stress questionnaire and The Cornell Musculoskeletal Discomfort Questionnaire through interviews with nurses in their workplace.

RESULTS

Most reported musculoskeletal discomforts localized in the neck, back, knee and shoulder and the minimal discomforts were in wrist and elbow. On the other hand, stressors such as demand, changes in workplace, control and responsibilities had significant effect on increasing musculoskeletal discomforts of organs such as neck, shoulders and back (P < 0.001).

CONCLUSION

There was a significant association between stressors such as demand, control, responsibilities and changes in workplace and reported musculoskeletal disorders, especially in neck, shoulders and back. It is suggested to use defined programs for management and control of stressors to control occupational stress in nurses. Moreover, prevention of musculoskeletal discomforts due to their high prevalence in the study population is important.

Role of IL1A rs1800587, IL1B rs1143627 and IL1RN rs2234677 genotype regarding development of chronic lumbar radicular pain; a prospective one-year study

Previous studies indicate that lumbar radicular pain following disc herniation may be associated with release of several pro-inflammatory mediators, including interleukin-1 (IL1). In the present study, we examined how genetic variability in IL1A (rs1800587 C>T), IL1B (rs1143627 T>C) and IL1RN (rs2234677 G>A) influenced the clinical outcome the first year after disc herniation. Patients (n = 258) with lumbar radicular pain due to disc herniation were recruited from two hospitals in Norway. Pain and disability were measured by visual analogue scale (VAS) and Oswestry Disability Index (ODI) over a 12 month period. The result showed that patients with the IL1A T allele, in combination with the IL1RN A allele had more pain and a slower recovery than other patients (VAS p = 0.049, ODI p = 0.059 rmANOVA; VAS p = 0.003, ODI p = 0.050 one-way ANOVA at 12 months). However, regarding the IL1B/IL1RN genotype, no clear effect on recovery was observed (VAS p = 0.175, ODI p = 0.055 rmANOVA; VAS p = 0.105, ODI p = 0.214 one-way ANOVA at 12 months). The data suggest that the IL1A T/IL1RN A genotype, but not the IL1B T/IL1RN A genotype, may increase the risk of a chronic outcome in patients following disc herniation.

Low back pain among textile workers: a cross-sectional study

BACKGROUND

Low back pain (LBP) is one of the most prevalent occupational health problems in industrialized countries. Little is known about the epidemiology of LBP in developing countries.

AIMS

To determine the prevalence of LBP among Nepalese textile workers and to investigate the influence of exposure to mechanical and other factors on LBP reporting.

METHODS

Interviewers completed questionnaires with study subjects, and work-related mechanical exposures were measured by self-completed questionnaires. Associations of LBP with mechanical factors and somatic symptoms were determined by logistic regression and reported as odds ratios (ORs) with 95% confidence intervals (CI).

RESULTS

Nine hundred and thirty-eight workers took part, a participation rate of 92%. The 1 month period prevalence of LBP was 35% (n = 324), being higher in females than males (45% versus 28%; P < 0.001). Several work-related mechanical factors were associated with increased odds of reporting LBP: lifting heavy weights with one hand (OR 1.7; 95% CI 1.1-2.8), pushing weights (OR 1.6; 95% CI 1.2-2.3 and pulling weights (OR 1.6; 95% CI 1.1-2.1). No association was found with working posture. Strong associations were found for reporting one (OR 2.4; 95% CI 1.7-3.4) or two somatic symptoms (OR 2.7; 95% CI 1.4-5.1). On multivariable analysis, reporting of somatic symptoms (OR 2.8; 95% CI 1.5-5.4), female gender (OR 2.2; 95% CI 1.5-3.1) and increasing age were significantly associated with increased risk of reporting LBP (OR 1.7; 95% CI 1.2-2.5), but no associations were found with mechanical factors.

CONCLUSIONS

This study suggests that mechanical load may not be the leading cause of LBP and adds to evidence that psychological factors play an important role in LBP in non-industrialized countries.

The influence of employment social support for risk and prognosis in nonspecific back pain: a systematic review and critical synthesis

Purpose

To examine the influence of employment social support type (e.g. co-worker, supervisor, general support) on risk of occurrence of low back pain, and prognosis (e.g. recovery, return to work status) for those who have low back pain.

Methods

Systematic search of seven databases (MEDLINE, Embase, PsychINFO, CINAHL, IBSS, AMED and BNI) for prospective or case–control studies reporting findings on employment social support in populations with nonspecific back pain. Data extraction and quality assessment were carried out on included studies. A systematic critical synthesis was carried out on extracted data.

Results

Thirty-two articles were included that describe 46 findings on the effect of employment social support on risk of and prognosis of back pain. Findings show that there is no effect of co-worker, supervisor or general work support on risk of new onset back pain. Weak effects of employment support were found for recovery and return to work outcomes; greater levels of co-worker support and general work support were found to be associated with less time to recovery or return to work.

Conclusions

The evidence suggests that the association between employment support and prognosis may be subject to influence from wider concepts related to the employment context. This review discusses these wider issues and offers directions for future research.

[Psychosocial work-related factors and musculoskeletal pain among schoolteachers]

This study aimed to investigate the association between work-related psychosocial factors and musculoskeletal pain (MP) among primary schoolteachers in the public school system in Salvador, Bahia State, Brazil. A cross-sectional epidemiological study included all 4,496 teachers from the system. A self-applied mail questionnaire was used to collect information on complaints of musculoskeletal pain in the upper limbs, lower limbs, and back (dependent variables), demand-control model quadrants (independent variables), and covariables. Multivariate logistic regression showed that teachers in high-stress jobs presented the highest MP rates, and that those with low-stress jobs had the lowest rates in all three body segments. Teachers in active jobs presented higher MP rates than those in low-stress jobs, particularly in the upper limbs and back. Higher MP prevalence rates were associated with heavier psychological demand in all three body segments and with limited job control in the upper limbs only.

Trends in work-related musculoskeletal disorders: a comparison of risk factors for symptoms using quality of work life data from the 2002 and 2006 general social survey

OBJECTIVE

To assess trends in risk factors for work-related musculoskeletal disorders (MSDs).

METHODS

Results from two similar national surveys (2002 and 2006) examined trends in relationships between individual, psychosocial, and physical factors and MSDs.

RESULTS

Findings between years were similar, but important differences included a stronger effect of "Work Stress" on "Pain in Arms," and a stronger combined effect of "Hand Movement" and "Work Stress" on "Pain in Arms." Also, two interactions were statistically significant in the 2006 data, but not in the 2002 data, revealing potentially increased risks. These were "Hand Movement" and "Work Stress" on "Back Pain," and "Heavy Lifting" and "Work Stress" on "Pain in Arms."

CONCLUSION

New strategies for preventing both low back and upper extremity MSDs should focus on work stress, heavy lifting, and hand movement, individually and in combination.

Health maintenance care in work-related low back pain and its association with disability recurrence

OBJECTIVES

To compare occurrence of repeated disability episodes across types of health care providers who treat claimants with new episodes of work-related low back pain (LBP).

METHOD

A total of 894 cases followed 1 year using workers' compensation claims data. Provider types were defined for the initial episode of disability and subsequent episode of health maintenance care.

RESULTS

Controlling for demographics and severity, the hazard ratio [HR] of disability recurrence for patients of physical therapists (HR = 2.0; 95% confidence interval [CI] = 1.0 to 3.9) or physicians (HR = 1.6; 95% CI = 0.9 to 6.2) was higher than that of chiropractor (referent, HR = 1.0), which was similar to that of the patients non-treated after return to work (HR = 1.2; 95% CI = 0.4 to 3.8).

CONCLUSIONS

In work-related nonspecific LBP, the use of health maintenance care provided by physical therapist or physician services was associated with a higher disability recurrence than in chiropractic services or no treatment.

Low back pain in Iran: a growing need to adapt and implement evidence-based practice in developing countries

STUDY DESIGN

A descriptive overview of the literature.

OBJECTIVE

To present a comprehensive descriptive overview of the published papers about epidemiologic features, burden, and current management of low back pain (LBP) in Iran.

SUMMARY OF BACKGROUND DATA

Little is known about the epidemiology, burden, and management of LBP in developing and low- to middle-income countries, such as Iran.

METHODS

A literature search was carried out using MEDLINE database to assess existing literature about prevalence, disease burden, impact, and current management of nonspecific LBP in Iran.

RESULTS

Twenty-six articles matched inclusion criteria and included in the study. The findings related to point, period, and lifetime prevalence of LBP in general population, working population, school children, and pregnant women ranged from 14.4% to 84.1%. The 1-year incidence of disabling LBP was found to be 2.1%. LBP is the third leading cause of disease burden (measured by Disability Adjusted Life Years) in Iranian population aged 15 to 69 years, without considering causes of intentional and unintentional injuries. High levels of anxiety and depression among patients with LBP and the etiological role of job strain in causing LBP in workers have been reported in Iran. Our search failed to find any articles about referral system, direct and indirect costs, social determinants, and current management of LBP in Iran.

CONCLUSION

This overview of the literature illustrates that LBP is a common symptom and an important cause of disease burden in Iran, in particular, in the most productive age for both males and females. The 1-year incidence of disabling LBP in Iran was found to be low. Future research will be necessary to investigate economic cost, social determinants, health technology assessment, and management of LBP in Iran.

Living conditions, including life style, in primary-care patients with nonacute, nonspecific spinal pain compared with a population-based sample: a cross-sectional study

Background

Nonspecific spinal pain (NSP), comprising back and/or neck pain, is one of the leading disorders behind long-term sick-listing, including disability pensions. Early interventions to prevent long-term sick-listing require the identification of patients at risk. The aim of this study was to compare living conditions associated with long-term sick-listing for NSP in patients with nonacute NSP, with a nonpatient population-based sample. Nonacute NSP is pain that leads to full-time sick-listing >3 weeks.

Methods

One hundred and twenty-five patients with nonacute NSP, 2000–2004, were included in a randomized controlled trial in Stockholm County with the objective of comparing cognitive–behavioral rehabilitation with traditional primary care. For these patients, a cross-sectional study was carried out with baseline data. Living conditions were compared between the patients and 338 nonpatients by logistic regression. The conditions from univariate analyses were included in a multivariate analysis. The nonsignificant variables were excluded sequentially to yield a model comprising only the significant factors (P < 0.05). The results are shown as odds ratios (OR) with 95% confidence intervals.

Results

In the univariate analyses, 13 of the 18 living conditions had higher odds for the patients with a dominance of physical work strains and Indication of alcohol over-consumption, odds ratio (OR) 14.8 (95% confidence interval [CI] 3.2–67.6). Five conditions qualified for the multivariate model: High physical workload, OR 13.7 (CI 5.9–32.2); Hectic work tempo, OR 8.4 (CI 2.5–28.3); Blue-collar job, OR 4.5 (CI 1.8–11.4); Obesity, OR 3.5 (CI 1.2–10.2); and Low education, OR 2.7 (CI 1.1–6.8).

Conclusions

As most of the living conditions have previously been insufficiently studied, our findings might contribute a wider knowledge of risk factors for long-term sick-listing for NSP. As the cross-sectional design makes causal conclusions impossible, our study should be complemented by prospective research.

Occupational injuries and illnesses in the solid waste industry: a call for action

Work-related injuries and illnesses are multi-factorial and remain major problems of public health magnitude requiring the attention of all stakeholders in the solid waste industry. The objective of this article was to describe the patterns of occupational injury and illness (OII) reporting incidence among workers in a major private U. S. solid waste management company. A five-year (2003-2007) retrospective review of the corporate Occupational Safety and Health Administration (OSHA) logs 300/300A/301 was conducted and employee OII reports (n = 1895) were analyzed from 37 establishments across 11 different states. The OII reporting rates were compared to industry average.

Low back pain: what determines functional outcome at six months? An observational study

Background

The rise in disability due to back pain has been exponential with escalating medical and societal costs. The relative contribution of individual prognostic indicators to the pattern of recovery remains unclear. The objective of this study was to determine the prognostic value of demographic, psychosocial, employment and clinical factors on outcome in patients with low back pain

Methods

A prospective cohort study with six-month follow-up was undertaken at a multidisciplinary back pain clinic in central London employing physiotherapists, osteopaths, clinical psychologists and physicians, receiving referrals from 123 general practitioners. Over a twelve-month period, 593 consecutive patients referred from general practice with simple low back pain were recruited. A baseline questionnaire was developed to elicit information on potential prognostic variables. The primary outcome measures were change in 24-item Roland Morris disability questionnaire score at six months as a measure of low back related functional disability and the physical functioning scale of the SF-36, adjusted for baseline scores.

Results

Roland Morris scores improved by 3.8 index points (95% confidence interval 3.23 to 4.32) at six months and SF-36 physical functioning score by 10.7 points (95% confidence interval 8.36 to 12.95). Ten factors were linked to outcome yet in a multiple regression model only two remained predictive. Those with episodic rather than continuous pain were more likely to have recovered at six months (odds ratio 2.64 confidence interval 1.25 to 5.60), while those that classified themselves as non-white were less likely to have recovered (0.41 confidence interval 0.18 to 0.96).

Conclusions

Analysis controlling for confounding variables, demonstrated that participants showed greater improvement if their episodes of pain during the previous year were short-lived while those with Middle Eastern, North African and Chinese ethnicity demonstrated minimal improvement. The study did not support previous findings that a wide range of factors could predict outcome.

Predictors of stable return-to-work in non-acute, non-specific spinal pain: low total prior sick-listing, high self prediction and young age. A two-year prospective cohort study

BACKGROUND

Non-specific spinal pain (NSP), comprising back and/or neck pain, is one of the leading disorders in long-term sick-listing. During 2000-2004, 125 Swedish primary-care patients with non-acute NSP, full-time sick-listed 6 weeks-2 years, were included in a randomized controlled trial to compare a cognitive-behavioural programme with traditional primary care. This prospective cohort study is a re-assessment of the data from the randomized trial with the 2 treatment groups considered as a single cohort. The aim was to investigate which baseline variables predict a stable return-to-work during a 2-year period after baseline: objective variables from function tests, socioeconomic, subjective and/or treatment variables. Stable return-to-work was a return-to-work lasting for at least 1 month from the start of follow-up.

METHODS

Stable return-to-work was the outcome variable, the above-mentioned factors were the predictive variables in multiple-logistic regression models, one per follow-up at 6, 12, 18 and 24 months after baseline. The factors from univariate analyzes with a p-value of at most .10 were included. The non-significant variables were excluded stepwise to yield models comprising only significant factors (p < .05). As the comparatively few cases made it risky to associate certain predictors with certain time-points, we finally considered the predictors which were represented in at least 3 follow-ups. They are presented with odds ratios (OR) and 95% confidence intervals.

RESULTS

Three variables qualified, all of them represented in 3 follow-ups: Low total prior sick-listing (including all diagnoses) was the strongest predictor in 2 follow-ups, 18 and 24 months, OR 4.8 [1.9-12.3] and 3.8 [1.6-8.7] respectively, High self prediction (the patients' own belief in return-to-work) was the strongest at 12 months, OR 5.2 [1.5-17.5] and Young age (max 44 years) the second strongest at 18 months, OR 3.5 [1.3-9.1].

CONCLUSIONS

In primary-care patients with non-acute NSP, the strong predictors of stable return-to-work were 2 socioeconomic variables, Low total prior sick-listing and Young age, and 1 subjective variable, High self-prediction. Objective variables from function tests and treatment variables were non-predictors. Except for Young age, the predictors have previously been insufficiently studied, and so our study should widen knowledge within clinical practice.

The effectiveness of a weak opioid medication versus a cyclo-oxygenase-2 (COX-2) selective non-steroidal anti-inflammatory drug in treating flare-up of chronic low-back pain: results from two randomized, double-blind, 6-week studies

Two 6-week studies compared the analgesic efficacy, tolerability and safety of a non-steroidal anti-inflammatory drug (celecoxib 200 mg twice a day [bid]) and an opioid (tramadol HCl 50 mg four times a day [qid]) in subjects with chronic low-back pain (CLBP). Successful responders (primary endpoint) were defined as subjects completing 6 weeks of treatment and having > or = 30% improvement on the Numerical Rating Scale for pain. A total of 796 and 802 subjects were randomized to treatment in study 1 and study 2, respectively. A significantly greater percentage of celecoxib-treated subjects were successful responders compared with tramadol HCl-treated subjects (study 1: 63.2% versus 49.9%, respectively; study 2: 64.1% versus 55.1%, respectively). Fewer adverse events (AEs) and serious AEs were reported in the celecoxib-treated group. Overall, celecoxib 200 mg bid was more effective than tramadol HCl 50 mg qid in the treatment of CLBP, with fewer AEs reported.