The influence of motor vehicle legislation on injury claim incidence

BACKGROUND: Although there have been numerous strategies to prevent motor vehicle collisions and their subsequent injuries, few have been effective in preventing motor vehicle injury claims. In this paper, we examine the role of legislation and compensation system in altering injury claim incidence. METHODS: The population base for our natural experiment was all Saskatchewan, Manitoba, British Columbia and Quebec residents who submitted personal injury claims to their respective motor vehicle insurance provider from 1990 to 1999. The provinces of Saskatchewan and Manitoba switched from Tort to pure No-Fault insurance on January 1, 1995 and on March 1, 1994 respectively. British Columbia maintained tort insurance and Quebec maintained pure no-fault insurance throughout the entire 10-year period. RESULTS: The conversion from tort insurance to pure no-fault motor vehicle insurance resulted in a five-year 31% (RR = 0.69; 95% CI 0.68-0.70) reduction in total injury claims per 100,000 residents in Saskatchewan and a five-year 43% (RR = 0.57; 95% CI 0.56-0.58) reduction in Manitoba. At the same time, the province of British Columbia retained tort insurance and had a five-year 5% reduction (RR = 0.95; 95% CI 0.94-0.99). Quebec, which retained pure no-fault throughout the entire 10-year period, had less than one third of the injury claims per 100,000 residents than the tort province of British Columbia. INTERPRETATION: The conversion from tort to pure no-fault legislation has a large influence in reducing motor vehicle injury claim incidence in Canada. Legislative system and injury compensation scheme have an observable impact on injury claim incidence and can therefore have significant impact on the health care system.     

Association between body mass index and recovery from whiplash injuries: a cohort study

It is hypothesized that excess weight is a risk factor for delayed recovery from neck pain, such as from whiplash injuries. However, the association between obesity and recovery from whiplash injury has not been studied. The authors examined the association between body mass index and time to recovery from whiplash injuries in a population-based cohort study of traffic injuries in Saskatchewan, Canada. The cohort included 4,395 individuals who made an insurance claim to Saskatchewan Government Insurance and were treated for whiplash injury between July 1, 1994, and December 31, 1995. Of those, 87.7% had recovered by November 1, 1997. No association was found between baseline body mass index and time to recovery. Compared with individuals with normal weight, those who were underweight (hazard rate ratio = 0.88, 95% confidence interval: 0.73, 1.06), overweight (hazard rate ratio = 1.01, 95% confidence interval: 0.94, 1.09), and obese (hazard rate ratio = 0.99, 95% confidence interval: 0.90, 1.08) had similar rates of recovery, even after adjustment for other factors. The results do not support the hypothesis that individuals who are overweight or obese have a worse prognosis for whiplash.     

No-fault medical liability in Virginia and Florida. A preliminary evaluation

State governments are experimenting with a variety of innovative approaches to the current tort system for medical malpractice liability. One such approach is to apply the concept of no-fault liability to medical practice. States such as Virginia and Florida have already adopted a limited version of such a concept. This article examines the problems of the current tort system, different types of no-fault medical insurance alternatives and their advantages, and the experiences of the states of Virginia and Florida with their limited no-fault malpractice insurance systems. The author concludes that the concept of no-fault compensation for medical malpractice is a promising remedy. However, it is a medicine that will require more testing before it can be pronounced a cure for the disease that plagues the current system.     

The association between exposure to a rear-end collision and future neck or shoulder pain: a cohort study

Neck pain is the most frequently reported feature in connection with whiplash injury, but it is also a common complaint in the general population. Therefore it is crucial to include an unexposed comparison group when evaluating the association between neck pain and a previous motor vehicle crash (MVC). To determine whether exposure to a rear-end collision, without or with whiplash injury, is associated with future neck or shoulder pain, a cohort study was conducted. The study population consisted of persons covered by traffic insurance at one of the largest insurance companies in Sweden. Claim reports were collected from the period November 1987 to April 1988. Drivers exposed to a rear-end collision were divided into two subgroups, without reported whiplash injury (n = 204) and with reported whiplash injury (n = 232). Two comparison groups, unexposed to MVCs, consisting of 1599 and 2089 persons, were selected with consideration taken to the age and gender distribution in the exposed subgroups. A questionnaire concerning neck or shoulder pain and other subjective health complaints was mailed to all the study subjects at follow-up in 1994, 7 years after the rear-end collision. The relative risk of neck or shoulder pain at follow-up was 1.3 (95% CI 0.8-2.0) in the exposed subjects without whiplash injury compared with the unexposed. The corresponding relative risk in subjects with whiplash injury was 2.7 (95% CI 2.1-3. 5). We conclude that there is no increased risk of future neck or shoulder pain in drivers who did not report whiplash injury in connection with a rear-end collision 7 years earlier. In drivers with reported whiplash injury, the risk of neck or shoulder pain 7 years after the collision was increased nearly three-fold compared with that in unexposed subjects.     

The association between exposure to a rear-end collision and future health complaints

Different symptoms, together with neck pain, have been attributed to persons with persistent complaints after a previous motor vehicle crash (MVC) and are sometimes referred to as the "late whiplash syndrome." A cohort study was conducted to determine whether exposure to a rear-end collision, with or without whiplash injury, is associated with future health complaints. The results regarding future neck or shoulder pain have previously been described, and the objective of the present report was to focus on outcomes other than neck pain. Included in the study were persons 18 to 65 years of age and covered by traffic insurance at one of the largest insurance companies in Sweden. Claim reports were collected from the period November 1987 to April 1988. Drivers exposed to a rear-end collision were divided into two subgroups: those with reported whiplash injury (n = 232) and those without reported whiplash injury (n = 204). For comparison, 3688 subjects who were unexposed to MVCs were selected, with consideration taken to the age and gender distribution in the exposed subgroups. The prevalence of different health complaints among the study subjects was estimated according to a mailed questionnaire at follow-up in 1994, 7 years after the rear-end collision. When exposed subjects with whiplash injury were compared to unexposed subjects, increased relative risks in the range of 1.6-3.7 were seen for headache, thoracic and low back pain, as well as for fatigue, sleep disturbances and ill health. No corresponding increased risks were found among the exposed subjects without reported whiplash injury. We conclude that rear-end collisions resulting in reported whiplash injuries seem to have a substantial impact on health complaints, even a long time after the collision. There is a need to identify factors that predict a non-favorable outcome in order to improve clinical management.     

The impact of depressive symptomatology on physical disability: MacArthur Studies of Successful Aging.

OBJECTIVES. The purpose of these analyses was to test the hypothesis that depressive symptomatology affects the risk of onset of physical disability in high-functioning elderly adults. METHODS. The data come from the MacArthur Study of Successful Aging, a community-based cohort of high-functioning adults aged 70 through 79 years who were assessed twice at a 2.5-year interval. Physical and cognitive status was assessed by performance as well as by self-report measures. RESULTS. In gender-stratified logistic regression models, high depressive symptoms as measured by the depression subscale of the Hopkins Symptom Checklist were associated with an increased risk of onset of disability in activities of daily living for both men and women, adjusting for baseline sociodemographic factors, physical health status, and cognitive functioning. CONCLUSIONS. Joined with evidence that physical disability is a potential risk factor for depression, these findings suggest that both depressive symptoms and physical disability can initiate a spiralling decline in physical and psychological health. Given the important impact of activities-of-daily-living functioning on utilization of medical services and quality of life, prevention or reduction of depressive symptoms should be considered an important point of intervention.     

EXPLORATION OF MIGRAINE PAIN,DISABILITY, DEPRESSIVE SYMPTOMATOLOGY,AND COPING: A PILOT STUDY

As many as 29% of women suffer from migraine headache, yet it remains a poorly understood phenomenon. Our purpose in conducting this pilot study was to determine the relationships among migraine pain, disability, depressive symptomatology, and coping in women. A convenience sample of 34 women was recruited from university and workplace populations. Nineteen women met the International Headache Society criteria for migraine, while 15 women served as a nonmigraine comparison group. Participants completed eight instruments measuring migraine pain, disability, depressive symptomatology, and coping. The two groups of women were not significantly different on demographic variables. Migraineurs scored significantly higher for pain characteristics, disability, depressive symptomatology, and total coping scores.     

Exploration of migraine pain, disability, depressive symptomatology, and coping: a pilot study

As many as 29% of women suffer from migraine headache, yet it remains a poorly understood phenomenon. Our purpose in conducting this pilot study was to determine the relationships among migraine pain, disability, depressive symptomatology, and coping in women. A convenience sample of 34 women was recruited from university and workplace populations. Nineteen women met the International Headache Society criteria for migraine, while 15 women served as a nonmigraine comparison group. Participants completed eight instruments measuring migraine pain, disability, depressive symptomatology, and coping. The two groups of women were not significantly different on demographic variables. Migraineurs scored significantly higher for pain characteristics, disability, depressive symptomatology, and total coping scores.     

The Contribution of Psychosocial Factors to Secondary Risk Prevention for Myocardial Infarction in Young Adults

The aim of this study was to explore and identify the contribution of complex psychosocial factors to secondary risk prevention for Myocardial Infarction (MI) among adults under 55 years. Participants included 30 MI patients who were admitted to St. Vincent's Health in Melbourne. A repeated measures mixed measures methodology was used to examine demographic information, depressive symptomatology, physical and emotional wellbeing, and social functioning during hospitalization and at 3 and 6 months post discharge. Participants demonstrated severe depression at initial assessment but this reduced significantly post discharge. Depression at initial assessment aligned with reports of intense fear of increased mortality. The reduction in depression scores at 3 and 6 months aligned with emotional management of the crisis and improvements in general health, and physical and social functioning. The majority of patients did not participate in community rehabilitation, naming informal supports as the most significant. These results lend support to the use of crisis intervention and empowerment strategies as key elements of cardiac rehabilitation programs, to improve physical functioning and attend to depressive symptomatology in a proactive way, to improve secondary risk prevention among young patients who experience an MI event.     

Post-treatment Lyme disease syndrome symptomatology and the impact on life functioning: is there something here?

Purpose

A subset of patients treated for Lyme disease report persistent or recurrent symptoms of unknown etiology named post-treatment Lyme disease syndrome (PTLDS). This study aims to describe a cohort of participants with early, untreated Lyme disease, and characterize post-treatment symptomatology and functional impact of PTLDS over time.

Methods

Sixty-three participants with erythema migrans and systemic symptoms were enrolled in a prospective cohort study. Participants underwent physical exams and clinical assessments, and completed the SF-36 (daily life functioning) and the Beck Depression Inventory, Second Edition (BDI-II) (depression), at each of five visits over a period of 6 months.

Results

Signs of Lyme disease disappeared post-treatment; however, new-onset patient-reported symptoms increased or plateaued over time. At 6 months, 36% of patients reported new-onset fatigue, 20% widespread pain, and 45% neurocognitive difficulties. However, less than 10% reported greater than “minimal” depression across the entire period. Those with PTLDS (36%) did not differ significantly from those without with respect to demographics, pre-treatment SF-36, and BDI-II scores. Statistically significant differences were found over time on the Role Physical, Vitality, Social Functioning, Role Emotional, and Mental Health subscales (with a trend toward significance for the remaining three subscales of Physical Functioning, Bodily Pain, and General Health) of the SF-36 between those with an eventual PTLDS diagnosis and those without when measured at 6 months.

Conclusions

Unlike clinical signs of Lyme disease, new-onset symptoms are reported by a subset of participants without evidence of depressive symptomatology. Patients who developed PTLDS had significantly lower life functioning compared to those without PTLDS. We propose future avenues for researching infection-triggered symptoms resulting from multiple mechanisms.     

The Saskatchewan Health and Back Pain Survey: the prevalence and factors associated with depressive symptomatology in Saskatchewan adults

OBJECTIVES: To determine the one-week period prevalence of depressive symptomatology among Saskatchewan adults and to identify sociodemographic and health factors associated with depressive symptomatology. METHODS: The Saskatchewan Health and Back Pain Survey was mailed to an age-stratified random sample of adults. Of the 2,184 eligible subjects, 55% (n = 1131) responded to the survey. We report age-standardized prevalence estimates stratified by age, gender and spinal pain severity. Logistic regression was used to measure the presence and strength of association between various factors and depressive symptomatology. RESULTS: 22.2% (95% CI 19.6-24.9) of adults experienced depressive symptomatology during the previous week, with higher rates in younger adults, in females, and in those with disabling spinal pain. Depressive symptomatology was associated with age, income, smoking, health status, gastro-intestinal problems, headaches and spinal pain. CONCLUSIONS: Depressive symptomatology is common in the Saskatchewan adult population, and is related to age, pain severity and general health.     

Social inequalities in depressive symptoms and physical functioning in the Whitehall II study: exploring a common cause explanation

STUDY OBJECTIVE: This study investigated which risk factors might explain social inequalities in both depressive symptoms and physical functioning and whether a common set of risk factors might account for the association between depressive symptoms and physical functioning. DESIGN: A longitudinal prospective occupational cohort study of female and male civil servants relating risk factors at baseline (phase 1: 1985-8) to employment grade gradients in depressive symptoms and physical functioning at follow up (phase 5: 1997-9). Analyses include the 7270 men and women who participated at phase 5. SETTING: Whitehall II Study: 20 London based white collar civil service departments. PARTICIPANTS: Male and female civil servants, 35-55 years at baseline. MAIN RESULTS: Depressive symptoms were measured by a subscale of items from the 30 item General Health Questionnaire. Physical functioning was measured by a subscale of the SF-36. Employment grade was used as a measure of socioeconomic position as it reflects both income and status. The grade gradient in depressive symptoms was entirely explained by risk factors including work characteristics, material disadvantage, social supports, and health behaviours. These risk factors only partially explained the gradient in physical functioning. The correlation between depressive symptoms and physical functioning was reduced by adjustment for risk factors and baseline health status but not much of the association was explained by adjustment for risk factors. Among women, the association between depression and physical functioning was significantly stronger in the lower grades both before and after adjustment for risk factors and baseline health. For women, there was only a significant grade gradient in depressive symptoms among those reporting physical ill health. CONCLUSIONS: Some risk factors contribute jointly to the explanation of social inequalities in mental and physical health although their relative importance differs. Work is most important for inequalities in depressive symptoms in men, and work and material disadvantage are equally important in explaining inequalities in depressive symptoms in women while health behaviours are more important for explaining inequalities in physical functioning. These risk factors did not account for the association between mental health and physical health or the greater comorbidity seen in women of lower socioeconomic status. The risk of secondary psychological distress among those with physical ill health is greater in the low employment grades.     

Vitamin B-6 and depressive symptomatology,over time,in older Latino adults

Background: Low vitamin B-6 status has been linked to depressive symptomatology. We examined the longitudinal association of vitamin B-6 status with depressive symptomatology across 3-time points over ～5–7 years in a cohort of older Hispanic adults.

Methods: We used two-level hierarchical linear regression models for continuous outcomes. Vitamin B-6 status was associated with depressive symptomatology across these time points.

Results: Plasma pyridoxyl-5-phosphate (PLP) concentration, a time-varying predictor, was significantly associated with depressive symptomatology. Study participants with PLP deficiency, vs. optimal PLP, had higher baseline depressive symptoms (Center for Epidemiologic Studies-Depression Scale (CES-D) score of 22?±?14, vs. 20?±?13); this differential remained constant over time and persisted after controlling for age, sex, education, body mass index, smoking and alcohol use, other relevant nutritional factors, perceived stress, stressful life events, allostatic load, and use of antidepressant medication. However, PLP concentration was not associated with the rate of change in depressive symptomatology over time.

Conclusions: Suboptimal plasma PLP is associated with higher depressive symptomatology in older Hispanic of Puerto Rican descent and this appears to persist over time. Our data suggest that identification and treatment of vitamin B-6 deficiency may be a useful preventive approach in this population.     

Psychosocial risk factors, inequality and self-rated morbidity in a changing society

The aim of this study was to analyse the interaction of social, economic, psychological and self-rated health characteristics of the Hungarian population in representative, stratified nation-wide samples during the period of sudden political-economic changes. In 1988 20,902 and in 1995 12,640 persons, representing the Hungarian population over the age of 16 by age, sex and place of residence were interviewed. Self-rated morbidity characteristics, shortened Beck Depression Inventory, hopelessness, hostility, ways of coping, social support, control over working situation and socioeconomic characteristics were examined. Age dependent changes could be observed between 1988 and 1995 with increasing depressive symptomatology, hopelessness, lack of control over working situation in the population above 40 years, while in the younger population improvements in depressive symptomatology could be seen. According to hierarchical loglinear analysis, depressive symptom severity mediates between relative socioeconomic deprivation and higher self-rated morbidity rates, especially among men. Depressive symptomatology is closely connected with hostility, low control in working situation, low perceived social support and emotional ways of coping. A vicious circle might be hypothesised between socially deprived situation and depressive symptomatology, which together has a major role in higher self-rated morbidity rates.     

Whiplash, chronic neck pain, and zygapophyseal joint disorders. A selective review

Recent research on whiplash injury has challenged the long-held view of what causes chronic neck pain in car accident victims. Although it was previously thought to result from residual scarring of muscles and ligaments, such pain is now understood to be caused by zygapophyseal-joint damage, which produces no objective findings on radiologic testing and often none on physical examination. Chronic pain from a whiplash injury can be reliably diagnosed and effectively treated in most patients by z-joint testing and radiofrequency blocks.     

The course of physical functional limitations and occupational conditions in a middle-aged working population in France

ABSTRACT: BACKGROUND: Physical functional limitations (PFL) have mainly been studied in older populations. The aim of this study was to better understand the course of PFL and associations with occupational factors by gender in a middle-aged working population. METHODS: The data came from 16,950 workers in the ESTEV (Enquete Sante Travail et Vieillissement) cohort in France. PFL were assessed using the physical abilities section of the Nottingham Health Profile. Occupational conditions were measured with a self-administered questionnaire covering physical and psychosocial factors in 1990 and 1995. Multivariate analyses were used to assess the associations. RESULTS: The PFL appearance rate in 1995 was the same by gender (6.3%); the rate of PFL recovery was higher in men (23.9% versus 20.9%). Age was an independent factor of PFL at age 47 years or older in both genders after adjusting for confounding factors. The PFL appearance rate in 1995 was higher with physical occupational exposure in 1990, such as awkward work with a dose relation in both genders, while the PFL recovery rate decreased significantly only for men. Exposure to psychosocial occupational conditions, such as having the means to produce quality work in 1990, was significantly associated with a decreased PFL appearance rate in 1995 in both genders, and having high decision latitude in 1990 was associated with a decreased PFL appearance rate in 1995 only in men. Changes in exposure to occupational factors between 1990 and 1995 were associated with the PFL appearance and recovery rates in 1995 in both genders. CONCLUSIONS: After five years, the course of PFL in this working population changed and was associated with physical and psychosocial occupational factors. Relationships were stronger for the PFL appearance rate in both genders and were weaker for recovery from PFL, mainly among women.     

Physical functioning among mid-life women: Associations with trajectory of depressive symptoms

During midlife, physical functioning limitations emerge and depressive symptoms are highly prevalent. We examined the relationship between physical functioning and depressive symptoms in the Michigan Study of Women’s Health Across the Nation (SWAN) cohort of mid-life women (n = 377). Seven performance-based physical functioning measures quantifying strength, balance, coordination, flexibility and range of motion and perceived physical functioning, assessed with the SF-36 physical functioning sub-score, were included. The Center for Epidemiological Studies Depression Scale (CES-D) identified concurrent depressive symptom trajectory from 2000/2001 through 2005/2006 and history of depressive symptoms from 1996/1997 through 1999/1900. Longitudinal mixed-effects regression modeling was used to evaluate relationships. Median age of participants was 50 years. As age increased, higher CES-D scores were associated with performance-based functions including slower timed walk sit-to-stand, and stair climb after adjusting for five-year history of depressive symptoms and relevant covariates. As age increased, those with higher CES-D scores were more likely to have perceived limitations in physical functioning, though the association was weak. History of depressive symptoms was not significant in any model. These findings suggest that higher concurrent depressive symptoms are modestly associated with slower movement and a perception of poorer functioning. In contrast, history of depressive symptoms played little or no role in current physical functioning of mid-life women. When evaluating physical function, women’s current mental health status should be considered.     

Perceived neighborhood problems and quality of life, physical functioning, and depressive symptoms among adults with asthma

OBJECTIVES: We investigated associations between perceived neighborhood problems and quality of life (QOL), physical functioning, and depressive symptoms among adults with asthma. METHODS: Using cross-sectional data from adults with asthma in northern California (n=435), we examined associations between 5 types of perceived neighborhood problems (traffic, noise, trash, smells, and fires) and asthma-specific QOL (Marks instrument), physical functioning (Short Form-12 physical component summary), and depressive symptoms (Center for Epidemiological Studies-Depression). We used multivariate regression analysis. RESULTS: When asthma severity and sociodemographics were taken into account, people reporting a score of 8 or higher on a scale of 0 to 25 for serious problems (the top quartile of seriousness) in their neighborhoods had significantly poorer QOL scores (mean difference=5.91; standard error [SE]=1.63), poorer physical functioning (mean difference=-3.04; SE=1.27), and almost a fivefold increase in depressive symptoms (odds ratio=4.79; 95% confidence interval=2.41, 9.52). CONCLUSIONS: A high level of perceived neighborhood problems was associated with poorer QOL, poorer physical functioning, and increased depressive symptoms among people with asthma when disease severity and sociodemographic factors were taken into account.     

Independent and Joint Impacts of Acid-Producing Diets and Depression on Physical Health among Breast Cancer Survivors

The purpose of this study was to examine the independent and joint associations of acid-producing diets and depressive symptoms with physical health among breast cancer survivors. We studied a cohort of 2944 early stage breast cancer survivors who provided dietary, physical health, demographic, and lifestyle information at baseline, year 1, and year 4. We assessed the intakes of acid-producing diets via two commonly used dietary acid load scores: potential renal acid load (PRAL) and net endogenous acid production (NEAP). Physical health was measured using the Rand 36-Item Short Form Health Survey (SF-36), consisting of physical functioning, role limitation due to physical function, bodily pain, general health, and overall physical health subscales. Increased dietary acid load and depression were each independently and significantly associated with reduced physical health subscales and overall physical health. Further, dietary acid load and depression were jointly associated with worse physical health. For instance, depressed women with dietary acid load higher than median reported 2.75 times the risk (odds ratio = 2.75; 95% confidence interval: 2.18–3.47) of reduced physical function and 3.10 times the risk of poor physical health (odds ratio = 3.10; 95% confidence interval: 2.53–3.80) compared to non-depressed women with dietary acid load lower than median. Our results highlight the need of controlling acid-producing diets and the access of mental care for breast cancer survivors.     

Longitudinal Study of Depressive Symptoms and Health-Related Quality of Life During Pregnancy and After Delivery: The Health Status in Pregnancy (HIP) Study

Objective Depressive symptoms are known to affect functioning in early pregnancy. We estimated the effect of a change in depressive symptoms status on health-related quality of life (HRQoL) throughout pregnancy and after delivery. Methods Longitudinal study of 200 women. The independent variable was depressive symptoms, defined as a Center for Epidemiologic Studies Depression (CES-D) score of ≥16. The dependent variable was HRQoL from 8 domains of the Medical Outcomes Study (SF-36) Short Form. Women were categorized based on the change in CES-D score: (1) never depressed, (2) became well, (3) became depressed and (4) always depressed. A random effects model was used to (1) estimate the effect of a change in depressive symptomatology from the first to the second trimester on HRQOL in the second trimester and (2) estimate the change in depressive symptomatology from the second to the third trimester on HRQoL in the third trimester and after delivery, adjusting for covariates. Intra-individual correlations were accounted for using generalized estimating equations (GEE). Results The proportion of women with depressive symptoms was 15%, 14%, and 30% in the first, second and third trimesters, respectively, and 9% after delivery. Women who became depressed had scores in the social domains that were 10–23 points and 19–31 points lower in the second and third trimesters, respectively, compared to women with no depressive symptoms. Women who became well had scores that were 3–31 points lower, compared to women with no depressive symptoms. Conclusions Alterations in depressive symptomatology have a substantial effect on functioning during pregnancy and after delivery. This paper was presented, in part, at the 134th Annual Meeting of the American Public Health Association, Boston, MA on November 8, 2006.