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A case-control study of risk factors for industrial low back injury. The utility of preplacement screening in defining high-risk groups.

Using a cohort of 8183 postal workers, this study assesses the efficacy of preplacement medical examinations in defining the risk of occupational low back injuries. From this cohort, 154 subjects with occupational low back injuries between 1983 and 1988 and 942 control subjects who did not have low back injuries were identified. A multivariate logistic regression shows that a history of prior disability, odds ratio 2.90 (95% confidence interval 1.88-4.48), and a heavy lifting job, odds ratio 1.91 (1.32-276) are associated with occupational low back injuries. However, a history of previous back injury on screening examination is not associated with subsequent occupational injury. The association between a history of disability and occupational low back injury has not been previously noted and warrants further research.

Adult↗

Australian workers with back injury: a statistical overview.

This paper reviews international and Australian data concerning the occurrence of back injuries amongst the labour force. Analyses of Australian Bureau of Statistics data for the period 1977 to 1986 revealed substantial differences between Australian states in their rates of back injury claims for work injuries, with a decline in rates over the ten years surveyed. Analyses of WorkCare data from the State of Victoria in Australia revealed that claimants with back injury claims of greater than 12 months standing were very costly. A total of 8,633 claimants accounted for 68.7% of all payments for back injury ($362 million out of a total of $527 million) when these claimants represented only 10.7% of all back injury claimants for the period September 1985 to May 1989. Substantial variations were found in claim rates across occupations and age levels. An almost linear (r = 0.98) association was found between age and proportion of long term claimants at each age level. It is suggested that these data could be used to identify 'at risk' groupings with a view to the implementation of preventive measures.

Adolescent↗

Short-term efficacy of back injury intervention project for patient care providers at one hospital.

A one-year Back Injury Prevention Program was initiated at a 440-bed acute care hospital in 1996 in response to concerns over high incidence and severity of back injuries among nursing staff and others. The program included an ergonomic evaluation of patient handling, pilot testing and purchase of new equipment, a train-the-trainer program, and training of 374 nurses and other patient handling staff (approximately one-half of the nursing staff). An impact evaluation, measured by comparing self-reported knowledge, work practices, and back pain among a subset of trainees and controls revealed an increase in knowledge of risk factors, a marginal increase in the use of mechanical devices to transfer patients, and a significant decrease in repositioning of patients in bed among trained versus control subjects (p = .017). Over the course of the program, the number of back injuries was 30% below the average of the prior 3 years, with the number of reported injuries in the final quarter (immediately following the training program) approximately one-seventh of the three prior quarters. It is concluded that back injury training may increase knowledge of risk factors and controls and may impact behaviors over which individuals have control (e.g., how often they move patients). However, training effectiveness is limited when engineering controls such as patient transfer devices are unavailable.

Back Injuries↗

Personal and job-related factors as determinants of incidence of back injuries among nursing personnel.

The purpose of this multicenter prospective cohort study was to assess personal and job-related factors as determinants of incidence of reported back injuries among nurses. The study population included 5,649 nurses who were surveyed by questionnaire and then observed for a 12-month study period. An annual injury rate of 4.9% was observed. Four factors were found to be significant (P less than .01) predictors of back injury. All four factors--service area, lifting, job category, and previously reported back injury--maintain significance when a forward stepping model of logistic regression is applied. The adjusted odds ratios observed are 4.26 for service areas where lifting occurs most as compared with areas where lifting occurs least; 2.19 for daily lifters v light, occasional, and nonlifters; 1.77 for nursing aides v registered nurses and supervisory personnel; and 1.73 for individuals who have previously reported back injury v those who have not reported previous injury. These findings strongly suggest that job-related rather than personal characteristics are the major predictors of back injury in nurses.

Accidents, Occupational↗

Prevention of disabling back injuries in nurses by the use of mechanical patient lift systems.

Occupational back pain in nurses (OBPN) constitutes a major source of morbidity in the health care environment. According to the National Institute for Occupational Safety and Health (NIOSH), occupational back injury is the second leading occupational injury in the United States. Among health care personnel, nurses have the highest rate of back pain, with an annual prevalence of 40-50% and a lifetime prevalence of 35-80%. The American Nursing Association believes that manual patient handling is unsafe and is directly responsible for musculoskeletal disorders encountered in nurses. It has been well documented that patient handling can be done safely with the use of assistive equipment and devices that eliminate these hazards to nurses that invite serious back injuries. The benefit of assistive patient handling equipment is characterized by the simultaneous reduction of the risk of musculoskeletal injury to the nursing staff and improvement in the quality of care for patient populations. To understand the cause of disabling injuries in health care workers, several factors must be considered, including the following: (1) anatomy/physiology of the back, (2) risk factors, (3) medical legal implications, and (4) prevention. Among nurses, back, neck, and shoulder injuries are commonly noted as the most prevalent and debilitating. While mostly associated with dependant patient care, the risk for musculoskeletal injury secondary to manual patient handling crosses all specialty areas of nursing. The skeletal defects of an abnormal back make the back more susceptible to occupational injury, even under normal stress conditions. Workers compensation guidelines for occupational back injury differ in public and private health care sectors from state to state. Nursing personnel should be reminded that the development of back pain following occupational activities in the hospital should be reported immediately to the Occupational Health Department. A nurse's failure to report OBPN immediately has resulted in numerous denials of claims for rehabilitation and compensation that nurses deserve. Experts believe that training in proper body mechanics does not prevent back injury. Consequently, focus has been placed on other innovative injury prevention programs, including the use of engineering controls as well as the "lift team" method. Ergonomics involves the use of mechanical devices (e.g., walking belt and mechanical hoist) to aid in patient lifting and transferring tasks. Guldmann Inc. has devised ceiling lift systems and slings during the past 20 years. They have successfully completed thousands of installations worldwide, covering a wide range of challenging conditions and complex environments. The Guldmann ceiling-mounted hoist system consists of a wide range of lifting units, rail components, and a complete assortment of lifting slings and accessories. Its sling is made of polyester, which is characterized by its strength and elasticity. It retains its shape and is dirt repellent and easy to maintain. The Guldmann network has one of the largest and indisputably most experienced group of certified installers in the United States. The "lift team" method was devised to remove nursing personnel from the everyday task of moving patients. This type of intervention assumes that lifting is a specialized skill to be performed only by expert professional patient movers who have been thoroughly trained in the latest lifting device techniques.

Back Injuries↗

Nursing staff back injuries: prevalence and cost in long term care facilities.

This report describes the period prevalence and cost of back injuries to nursing staff of long term care facilities in comparison to nurses employed industry wide and to other occupations industry wide. The period prevalence of back injuries to nursing staff in long term care facilities was highest for nurse aides, followed by LPNs and then RNs. Nurses (combined) had a period prevalence of back injuries nearly 1.5 times higher than all employees of long term care facilities and 6 times higher than all occupations combined industry wide. Within long term care facilities, nurses sustaining back injuries were younger and had been employed for a shorter period of time than the average for all nurses employed in long term care facilities. Back injuries accounted for more than half of the indemnity and medical costs for all injuries incurred in nursing homes and industry wide. The findings highlight the need for better prevention and rehabilitation

Adult↗

Neck and low back injuries in wrestling.

Drs. Wroble and Albright review the neck and low back injuries of the University of Iowa wrestling teams over the last 8 years with respect to diagnosis, mechanism of injury, time lost from wrestling, and recurrence. They describe examination of the low back and treatment of low back injuries. Examination of the neck is reviewed in detail and common neck injuries are discussed. Emergency management of acute neck injuries is outlined. Various aspects of prevention of neck injuries are presented.

Adult↗

The effects of compensation on recovery from low-back injury.

The influence of compensation on recovery from low-back pain was assessed in a retrospective controlled cohort study. One hundred fifty compensable and 150 noncompensable back injury patients were invited for review between 1 and 5 years from presentation. A 91.3% follow-up was achieved, and there was no difference in the median age, follow-up, and initial injury score between the two groups. The incidence of reported pain, disability, psychological disturbance, unemployment, and length of time off work was greater in the compensation group (P less than 0.001). Settlement of the claim did not result in any reduction in morbidity, even up to 5 years later. These results demonstrate that the payment of compensation delays recovery from low-back injury.

Adult↗

Cardiopulmonary resuscitation and back injury in ambulance officers.

OBJECTIVE: Cardiopulmonary resuscitation (CPR) is frequently performed by allied health professionals, and, if undertaken in compromised positions, it may induce injury to the rescuer's spine. Back pain as an occupational symptom in manual workers has received considerable attention in the medical literature, but there is no report on the effect of CPR on back discomfort. This article reports a survey that explored the difficulties encountered by ambulance officers during the CPR procedure. METHODS: A questionnaire was sent to ambulance officers who had CPR experience through the Director and station officers-in-charge of the Fire Services Department in Hong Kong. RESULTS: Analysis of 318 completed questionnaires showed that the duration of the CPR procedure could last up to 32 min. Two hundred and ninety ambulance officers had experience in delivering CPR on a bed, and 60% of them often had to climb onto the bed with their legs overhanging to perform CPR. Eighty-nine percent were often required to turn their head or twist their back to look at the monitor during CPR. Almost 60% complained of always, and 36% sometimes, experiencing back discomfort during CPR. Only 4.5% had no experience of back discomfort during CPR. Seventy-six (24%) respondents suffered back injury, and as many as 62% of these 76 officers considered the cause of their back injury was related to CPR delivery. Nearly 50% of respondents reported that it was difficult to maintain balance and concurrently deliver CPR while travelling in the ambulance or when the patient was being transported from one location to another. CONCLUSIONS: Results of this survey suggest that there is a need to review the support given to ambulance officers to ensure safe administration of CPR, particularly during ambulance transport.

Ambulances↗

Knee flexion to extension peak torque ratios and low-back injuries in highly active individuals.

The purpose of this study was to investigate for possible relationships between knee flexion to extension peak torque ratios (F1/Ext(rat)) and low-back injuries in highly active males and females. Forty-eight male (age 25.9 +/- 4.5 years) and 41 female (age 27.3 +/- 2.6 years) competitive rowers, and 20 male (age 26.6 +/- 6.0 years) professional ballet dancers volunteered for the study. Each subject performed a test of lumbar and knee flexor flexibility, isokinetic dynamometry and completed a self-administered questionnaire. Flexibility was assessed by using the sit-and-reach test. Knee flexion to extension peak torques were bilaterally monitored at the angular velocities of 1.04 and 4.19 rad x s(-1). The questionnaire was designed to obtain information regarding the number of days off action (e.g., training, competition, and rehearsals), due to low-back injuries, for the 12-month period prior to testing. Results revealed significant negative correlation coefficients between knee F1/Ext(rat), obtained at 1.04 rad x s(-1), and days off physical activity for oarsmen (r = - 0.69; p < 0.01), oarswomen (r = -0.62; p < 0.01) and male dancers (r = -0.57; p < 0.05). No such correlations were found for either knee F1/ Ext(rat) obtained at the angular velocity of 4.19 rad x s(-1) or between the sit-and-reach test results and low-back injuries. A sub-group of 22 female rowers was re-tested after a 6-8 month period, during which a special hamstring strength training programme was introduced. The main conclusions were: a) the lower the F1/Ext(rat) the greater the degree of low-back injury, b) at least in female rowers, 6-8 months of hamstring strength training can contribute to a reduction of the incidence of low-back injury, and c) isokinetic assessment of quadriceps and hamstrings obtained at lower compared to higher angular velocities is more prognostic of low back injury.

Adult↗

Epidemiology of back injury in university hospital nurses from review of workers' compensation records and a case-control survey.

Reviewing Workers' Compensation records for back injury from a large university hospital for a 2-year period, we found a yearly incidence of lost work time back injury among nurses of 2.0% per year, exceeded only by physical plant staff, who had a rate of 3.5%. Nurses' aides had an injury rate 3.3-fold higher than registered nurses and licensed practical nurses and higher than any other occupational group. We compared 100 cases of nurses with back injury in the previous 2 years with 197 noninjured control subjects using a mailed 40-item questionnaire. Multivariate logistic modelling showed that prior nonback injury and performing combined lifting activities were statistically significant risk factors for back injury, and being overweight approached significance, after adjusting for the effects of age, gender, and each of the evaluated risk factors.

Accidents, Occupational↗

Low-back injuries in a heavy industry. I. Worker and workplace factors.

The costs and circumstances of low-back strains, low-back impact injuries, and non-low-back injuries among field employees of an offshore petroleum drilling company, 1979-1985, were compared. The objectives were to identify worker and workplace factors associated with low-back injuries, to identify factors differentially associated with lost-time injuries, and to formulate recommendations for the control of low-back injuries. Low-back-impact injuries resulted largely from falls. Efforts to prevent falls would have a potential to reduce other serious consequences as well as back injuries. Workers performing the heaviest physical labor were at highest risk of low-back strains. Based on activities precipitating the injury, modifications of work site, equipment, and procedures to help reduce low-back strains are recommended. Only job was a predictor of whether a low-back strain was likely to be associated with lost time. Even this association was lacking for low-back impact injuries. Cost control by preventing the small proportion of high cost injuries may not be feasible. Rather, subsets of low-back injuries defined, for example, by work site or activity can suggest options for intervention.

Accidental Falls↗

Results of a multicenter trial using an intensive active exercise program for the treatment of acute soft tissue and back injuries.

Dissatisfaction with current nonsurgical treatment of acute soft tissue and back injuries initiated a search for more effective treatment. A multicenter trial, involving 12 clinics, treated 1,072 patients. Treatment consisted of intensive, time-limited exercises emphasizing mobility, muscle strengthening, work conditioning, sequence training, and appropriate education sessions. Return to full-time work was proof that the patient had recovered fully. Time off work and compensation costs were parameters used to evaluate results. A detailed study of 703 patients treated at five clinics, operational for more than 12 months, showed superior results when compared with the comparison group of 2,172 matched control subjects. The treatment group returned to work earlier and realized substantial cost savings. This treatment program has proved to be superior to the miscellaneous variety of treatment modalities used for acute soft tissue and back injuries provided to the comparison group.

Back Injuries↗

MMPI scale 3 as a predictor of back injury report: what does it tell us?

Items and selected subscales of Scale 3 (Hysteria) of the MMPI were examined to pinpoint personality or emotional factors predictive of back injury reports in an industrial setting. Data were derived from a previous prospective-design study of back pain in volunteer hourly wage employees of an aircraft manufacturing company. After physical examination and completion of questionnaires pertaining to demographic, psychosocial (including the MMPI), and workplace factors, workers were followed for an average of 3 years. Those who subsequently reported back injury were compared with those who did not. In that study three variables predicted report of back injury, one of which was Scale 3 of the MMPI. Individual items, Ornduff et al. subscales of Psychological Denial and Body Concern, and the five Harris-Lingoes (1955) subscales of Scale 3 were analyzed. Three Harris-Lingoes subscales showed significant relationships to the criterion. Hy-3: Lassitude/Malaise; Hy-1: Denial of Social Anxiety; and, marginally, Hy-2: Need for Affection, significantly contributed to prediction effectiveness. Results and implications for the understanding of factors predicting back injury reports and for the medical evaluation of pain and the concept of pain are discussed.

Back Injuries↗

Return to work following whiplash and back injury: a review and evaluation.

The purpose of this study is to review the reported return-to-work rates following whiplash and back-injury. The return-to-work rates for the 71 relevant studies that were reviewed varied from 29% to 100% with a median of 67%. The results suggest considerable residual return-to-work potential for persons with whiplash and back injury. Return-to-work rates were substantially higher for motor vehicle (96%) compared to work-related (71%) studies and also considerably higher for whiplash (95%) compared to back injuries (65%). It is suggested that these indices may form potential benchmarks for personal injury claims outcomes. The purpose of this paper is to analyse the published rates of return to work following whiplash and back injury. This criterion of return to work is not without limitations or controversy and Pfingsten, Hildebrandt Leibing, Franz and Saur (1997) noted: "... a high variability exists in data on return-to-work. Results often range from either no return to a very high return rate, with an approximate average of 68% following multimodal treatment procedures...".

Back Injuries↗

Occupational low-back injury in a hospital employee population: an epidemiologic analysis of multiple risk factors of a high-risk occupational group.

A case-control study was carried out using 84 cases of employee back injuries and 168 controls (matched triplets) at Children's Hospital and Health Center, San Diego. The objective was to examine the impact of multiple individual and work-related risk factors for low-back injury from hospital employee health records. Hospital workers include occupational groups historically regarded as being at high risk, particularly nurses and others involved in patient care. In terms of traditional risk factors, significant associations were found for history of low-back pain or "slipped disc" by self-report and for history of previous back injury. Working the day shift also was significant (odds ratio [OR] = 2.23, P less than 0.005). Marital status (single) approached significance (OR = 1.65, confidence interval [CI] = 0.091, 2.99), as did low body weight (OR = 1.47, Cl 0.70, 3.10). No significant association was found between cigarette smoking and low-back injury. Possible work site health promotion interventions to lower the risk of low-back injury in this population are suggested.

Adult↗

Tenderness at motor points. A diagnostic and prognostic aid for low-back injury.

In patients with low-back injury the motor points of some muscles may be tender. Of fifty patients with low-back "strain", twenty-six had tender motor points and twenty-four did not, while forty-nine of fifty patients with radicular signs and symptoms suggesting disc involvement had tender motor points, and the one without such tender points had a hamstring contusion which limited straight leg raising. Of fifty controls with no back disability, only seven had mild tender points after strenuous activity, while forty-six of another fifty controls with occasional back discomfort had mild motor-point tenderness. In all instances the tender motor points were located in the myotomes corresponding to the probable segmental levels of spinal injury and of root involvement, when present. Patients with low-back strain and no tender motor points were disabled for an average of 6.9 weeks, while those with the same diagnosis but tender motor points were disabled for an average of 19.7 weeks, or almost as long as the patients with signs of radicular involvement, who were disabled for an average of 25.7 weeks. Tender motor points may therefore be of diagnostic and prognostic value, serving as sensitive localizers of radicular involvement and differentiating a simple mechanical low-back strain from one with neural involvement.

Adult↗

Second in a series. Personal factors contributing to back injury in home care.

A healthy back is necessary for every activity a person undertakes--whether at work, home, or anywhere else. Preventing back problems is more effective than treating them after they happen. If a person gets a back injury, it may not be caused just by a single activity, but by many activities and lifestyle choices that have added up over time.

Accidents, Occupational↗