The Global Burden of Musculoskeletal Pain-Where to From Here?

To summarize the current understanding of the global burden of musculoskeletal pain-related conditions, consider the process of evidence generation and the steps to generate global pain estimates, identify key gaps in our understanding, and propose an agenda to address these gaps, we performed a narrative review. In the 2010 Global Burden of Disease Study (GBD), which broadened the scope of musculoskeletal conditions that were included over previous rounds, low back pain imposed the highest disability burden of all specific conditions assessed, and subsequent GBD reports further reinforce the size of this burden. Over the past decade, the GBD has produced compelling evidence of the leading contribution of musculoskeletal pain conditions to the global burden of disability, but this has not translated into global health policy initiatives. However, system- and service-level responses to the disease burden persist across high-, middle-, and low-income settings. There is a mismatch between the burden of musculoskeletal pain conditions and appropriate health policy response and planning internationally that can be addressed with an integrated research and policy agenda.

Burden of musculoskeletal disorders in the Eastern Mediterranean Region, 1990-2013: findings from the Global Burden of Disease Study 2013.

OBJECTIVES: We used findings from the Global Burden of Disease Study 2013 to report the burden of musculoskeletal disorders in the Eastern Mediterranean Region (EMR). METHODS: The burden of musculoskeletal disorders was calculated for the EMR's 22 countries between 1990 and 2013. A systematic analysis was performed on mortality and morbidity data to estimate prevalence, death, years of live lost, years lived with disability and disability-adjusted life years (DALYs). RESULTS: For musculoskeletal disorders, the crude DALYs rate per 100 000 increased from 1297.1 (95% uncertainty interval (UI) 924.3-1703.4) in 1990 to 1606.0 (95% UI 1141.2-2130.4) in 2013. During 1990-2013, the total DALYs of musculoskeletal disorders increased by 105.2% in the EMR compared with a 58.0% increase in the rest of the world. The burden of musculoskeletal disorders as a proportion of total DALYs increased from 2.4% (95% UI 1.7-3.0) in 1990 to 4.7% (95% UI 3.6-5.8) in 2013. The range of point prevalence (per 1000) among the EMR countries was 28.2-136.0 for low back pain, 27.3-49.7 for neck pain, 9.7-37.3 for osteoarthritis (OA), 0.6-2.2 for rheumatoid arthritis and 0.1-0.8 for gout. Low back pain and neck pain had the highest burden in EMR countries. CONCLUSIONS: This study shows a high burden of musculoskeletal disorders, with a faster increase in EMR compared with the rest of the world. The reasons for this faster increase need to be explored. Our findings call for incorporating prevention and control programmes that should include improving health data, addressing risk factors, providing evidence-based care and community programmes to increase awareness.

Reflecting on the global burden of musculoskeletal conditions: lessons learnt from the global burden of disease 2010 study and the next steps forward.

The objective of this paper is to provide an overview of the strengths, limitations and lessons learned from estimating the burden from musculoskeletal (MSK) conditions in the Global Burden of Disease 2010 Study (GBD 2010 Study). It should be read in conjunction with the other GBD 2010 Study papers published in this journal. The strengths of the GBD 2010 Study include: the involvement of a MSK expert group; development of new and more valid case definitions, functional health states, and disability weights to better reflect the MSK conditions; the extensive series of systematic reviews undertaken to obtain data to derive the burden estimates; and the use of a new, more advanced version of the disease-modelling software (DisMod-MR). Limitations include: many regions of the world did not have data; the extent of heterogeneity between included studies; and burden does not include broader aspects of life, such as participation and well-being. A number of lessons were learned. Ongoing involvement of experts is critical to ensure the success of future efforts to quantify and monitor this burden. A paradigm shift is urgently needed among global agencies in order to alleviate the rapidly increasing global burden from MSK conditions. Prevention and control of MSK disability are required, along with health system changes. Further research is needed to improve understanding of the predictors and clinical course across different settings, and the ways in which MSK conditions can be better managed and prevented.

The global burden of other musculoskeletal disorders: estimates from the Global Burden of Disease 2010 study.

OBJECTIVE: To estimate disability from the remainder of musculoskeletal (MSK) disorders (categorised as other MSK) not covered by the estimates made specifically for osteoarthritis (OA), rheumatoid arthritis (RA), gout, low back pain and neck pain, as part of the Global Burden of Disease (GBD) 2010 study. METHODS: Systematic reviews were conducted to gather the age-sex-specific epidemiological data for other MSK. The focus was on finding health surveys and published studies that measured the overall amount of MSK disorders and complaints, and classified the remainder of MSK disorders that was not RA, OA, gout, low back or neck pain. Six levels of severity were defined to derive disability weights (DWs) and severity distribution. The data, DWs and severity distribution were used to calculate years of life lived with disability (YLDs). Mortality was estimated for MSK-related deaths classified under other MSK. YLDs were added to years of life lost (YLLs) from the mortality estimates to derive overall burden in disability-adjusted life years (DALYs). RESULTS: Global prevalence of other MSK was 8.4% (95% uncertainty interval (UI) 8.1% to 8.6%). DALYs increased from 20.6 million (95% UI 17.0 to 23.3 million) in 1990 to 30.9 million (95% UI 25.8 to 34.6 million) in 2010. The burden of other MSK increased with age. Globally, other MSK disability burden (YLD) ranked sixth. CONCLUSIONS: Ageing of the global population will further increase the burden of other MSK. Specific MSK conditions within this large category should be considered separately to enable more explicit estimates of their burden in future iterations of GBD.

The global burden of musculoskeletal conditions for 2010: an overview of methods.

The objective of this paper is to provide an overview of methods used for estimating the burden from musculoskeletal (MSK) conditions in the Global Burden of Diseases 2010 study. It should be read in conjunction with the disease-specific MSK papers published in Annals of Rheumatic Diseases. Burden estimates (disability-adjusted life years (DALYs)) were made for five specific MSK conditions: hip and/or knee osteoarthritis (OA), low back pain (LBP), rheumatoid arthritis (RA), gout and neck pain, and an 'other MSK conditions' category. For each condition, the main disabling sequelae were identified and disability weights (DW) were derived based on short lay descriptions. Mortality (years of life lost (YLLs)) was estimated for RA and the rest category of 'other MSK', which includes a wide range of conditions such as systemic lupus erythematosus, other autoimmune diseases and osteomyelitis. A series of systematic reviews were conducted to determine the prevalence, incidence, remission, duration and mortality risk of each condition. A Bayesian meta-regression method was used to pool available data and to predict prevalence values for regions with no or scarce data. The DWs were applied to prevalence values for 1990, 2005 and 2010 to derive years lived with disability. These were added to YLLs to quantify overall burden (DALYs) for each condition. To estimate the burden of MSK disease arising from risk factors, population attributable fractions were determined for bone mineral density as a risk factor for fractures, the occupational risk of LBP and elevated body mass index as a risk factor for LBP and OA. Burden of Disease studies provide pivotal guidance for governments when determining health priority areas and allocating resources. Rigorous methods were used to derive the increasing global burden of MSK conditions.

Mortality measures from sample-based surveillance: evidence of the epidemiological transition in Viet Nam.

OBJECTIVE: To report methods and results from a national sample mortality surveillance programme implemented in Viet Nam in 2009. METHODS: A national sample of 192 communes located in 16 provinces and covering a population of approximately 2.6 million was selected using multi-stage cluster sampling. Deaths for 2009 were identified from several local data sources. Record reconciliation and capture-recapture methods were used to compile data and assess completeness of the records. Life tables were computed using reported and adjusted age-specific death rates. Each death was followed up by verbal autopsy to ascertain the probable cause(s) of death. Underlying causes were certified and coded according to international guidelines. FINDINGS: A total of 9921 deaths were identified in the sample population. Completeness of death records was estimated to be 81%. Adjusted life expectancies at birth were 70.4 and 78.7 years for males and females, respectively. Stroke was the leading cause of death in both sexes. Other prominent causes were road traffic accidents, cancers and HIV infection in males, and cardiovascular conditions, pneumonia and diabetes in females. CONCLUSION: Viet Nam is undergoing the epidemiological transition. Although data are relatively complete, they could be further improved through strengthened local collaboration. Medical certification for deaths in hospitals, and shorter recall periods for verbal autopsy interviews would improve cause of death ascertainment.

Road traffic related mortality in Vietnam: evidence for policy from a national sample mortality surveillance system.

BACKGROUND: Road traffic injuries (RTIs) are among the leading causes of mortality in Vietnam. However, mortality data collection systems in Vietnam in general and for RTIs in particular, remain inconsistent and incomplete. Underlying distributions of external causes and body injuries are not available from routine data collection systems or from studies till date. This paper presents characteristics, user type pattern, seasonal distribution, and causes of 1,061 deaths attributable to road crashes ascertained from a national sample mortality surveillance system in Vietnam over a two-year period (2008 and 2009). METHODS: A sample mortality surveillance system was designed for Vietnam, comprising 192 communes in 16 provinces, accounting for approximately 3% of the Vietnamese population. Deaths were identified from commune level data sources, and followed up by verbal autopsy (VA) based ascertainment of cause of death. Age-standardised mortality rates from RTIs were computed. VA questionnaires were analysed in depth to derive descriptive characteristics of RTI deaths in the sample. RESULTS: The age-standardized mortality rates from RTIs were 33.5 and 8.5 per 100,000 for males and females respectively. Majority of deaths were males (79%). Seventy three percent of all deaths were aged from 15 to 49 years and 58% were motorcycle users. As high as 80% of deaths occurred on the day of injury, 42% occurred prior to arrival at hospital, and a further 29% occurred on-site. Direct causes of death were identified for 446 deaths (42%) with head injuries being the most common cause attributable to road traffic injuries overall (79%) and to motorcycle crashes in particular (78%). CONCLUSION: The VA method can provide a useful data source to analyse RTI mortality. The observed considerable mortality from head injuries among motorcycle users highlights the need to evaluate current practice and effectiveness of motorcycle helmet use in Vietnam. The high number of deaths occurring on-site or prior to hospital admission indicates a need for effective pre-hospital first aid services and timely access to emergency facilities. In the absence of standardised death certification, sustained efforts are needed to strengthen mortality surveillance sites supplemented by VA to support evidence based monitoring and control of RTI mortality.

Working together to address disability in a culturally-appropriate and sustainable manner.

PURPOSE: Disability has an enormous impact throughout the world. An increasing amount of important disability research and practice is being undertaken in low-income settings; however, success and sustainability of programmes in these contexts can often be challenging. We share lessons from our experiences. METHOD: We reviewed past literature and international consensus statements relating to disability and development practice. We then held several face to face and email discussions to document the key lessons we have learnt from working in this context. We report on these in this paper. RESULTS: The key lessons are to invest adequate time and develop trusting relationships, undertake sufficient consultation and collaboration, include and empower persons with disability, and view capacity building as a two-way process. CONCLUSIONS: Improving the lives of persons with disability in development contexts is likely to be best achieved through processes that are inclusive, owned and driven by local communities.

Musculoskeletal Health Conditions Represent a Global Threat to Healthy Aging: A Report for the 2015 World Health Organization World Report on Ageing and Health.

Persistent pain, impaired mobility and function, and reduced quality of life and mental well-being are the most common experiences associated with musculoskeletal conditions, of which there are more than 150 types. The prevalence and impact of musculoskeletal conditions increase with aging. A profound burden of musculoskeletal disease exists in developed and developing nations. Notably, this burden far exceeds service capacity. Population growth, aging, and sedentary lifestyles, particularly in developing countries, will create a crisis for population health that requires a multisystem response with musculoskeletal health services as a critical component. Globally, there is an emphasis on maintaining an active lifestyle to reduce the impacts of obesity, cardiovascular conditions, cancer, osteoporosis, and diabetes in older people. Painful musculoskeletal conditions, however, profoundly limit the ability of people to make these lifestyle changes. A strong relationship exists between painful musculoskeletal conditions and a reduced capacity to engage in physical activity resulting in functional decline, frailty, reduced well-being, and loss of independence. Multilevel strategies and approaches to care that adopt a whole person approach are needed to address the impact of impaired musculoskeletal health and its sequelae. Effective strategies are available to address the impact of musculoskeletal conditions; some are of low cost (e.g., primary care-based interventions) but others are expensive and, as such, are usually only feasible for developed nations. In developing nations, it is crucial that any reform or development initiatives, including research, must adhere to the principles of development effectiveness to avoid doing harm to the health systems in these settings.

Burden of disability due to musculoskeletal (MSK) disorders.

This chapter summarises the global and regional prevalence, disability (Years Lived with Disability (YLDs)) and overall burden (Disability Adjusted Life Years (DALYs)) and costs for the common musculoskeletal disorders including low back and neck pain, hip and knee osteoarthritis, rheumatoid arthritis, gout, and a remaining combined group of other MSK conditions. The contribution of the role of pain in disability burden is introduced. Trends over time and predictions of increasing MSK disability with demographic changes are addressed and the particular challenges facing the developing world are highlighted.

Stroke mortality variations in South-East Asia: empirical evidence from the field.

BACKGROUND: Stroke is a leading cause of death in Asia; however, many estimates of stroke mortality are based on epidemiological models rather than empirical data. Since 2005, initiatives have been undertaken in a number of Asian countries to strengthen and analyse vital registration data. This has increased the availability of empirical data on stroke mortality. AIMS: The aim of this paper is to present estimates of stroke mortality for Indonesia, Myanmar, Viet Nam, Thailand, and Malaysia, which have been derived using these empirical data. METHODS: Age-specific stroke mortality rates were calculated in each of the five countries, and adjusted for data completeness or misclassification where feasible. All data were age-standardized and the resulting rates were compared with World Health Organization estimates, which are largely based on epidemiological models. RESULTS: Using empirical data, stroke ranked as the leading cause of death in all countries except Malaysia, where it ranked as the second leading cause. Age-standardized rates for males ranged from 94 per 100,000 in Thailand, to over 300 per 100,000 in Indonesia. In all countries, rates were higher for males than for females, and those compiled from empirical data were generally higher than modelled estimates published by World Health Organization. CONCLUSIONS: This study highlights the extent of stroke mortality in selected Asian countries, and provides important baseline information to investigate the aetiology of stroke in Asia and design appropriate public health strategies to address the rapidly growing burden from stroke.

Placing the global burden of low back pain in context.

The latest Global Burden of Disease Study, published at the end of 2012, has highlighted the enormous global burden of low back pain. In contrast to the previous study, when it was ranked 105 out of 136 conditions, low back pain is now the leading cause of disability globally, ahead of 290 other conditions. It was estimated to be responsible for 58.2 million years lived with disability in 1990, increasing to 83 million in 2010. This chapter illustrates the ways that the Global Burden of Disease data can be displayed using the data visualisation tools specifically designed for this purpose. It also considers how best to increase the precision of future global burden of low back pain estimates by identifying limitations in the available data and priorities for further research. Finally, it discusses what should be done at a policy level to militate against the rising burden of this condition.

Musculoskeletal pain on the global stage: what next?

In this essay, we describe two recent developments in global public health efforts in the chronic pain field and use the example of musculoskeletal pain to explore some of the implications arising from these developments. The first is the recognition of chronic pain as a condition in its own right, which has been the impetus for several national and one recent international pain summits that have translated that into a call for recognition, rights and resources for people with pain. The other development is the first comprehensive attempt to measure the global burden of musculoskeletal conditions in the current round of the Global Burden of Diseases, Injuries and Risk Factors Study (GBD 2010). In essence, the task here has been to translate epidemiological data from all countries where data are available into standardised measures of the overall burden of musculoskeletal conditions to allow comparison of the burden relative to other conditions, and to identify the proportion of the burden that is attributable to a set of common risk factors. Past rounds of the GBD have been influential in priority setting and allocation of health funding by the World Health Organisation and national governments. The current GBD 2010 Study is occurring in the context of changes in thinking about how to fund health care in a global context. These changes are away from disease-specific programmes to more 'integrated' approaches, and thus represent a potential challenge to the calls to consider pain-focussed funding. We explore the strategic implications of both of these developments for translating our better understanding of the problem of musculoskeletal pain into effective policy action.

In rural Tibet, the prevalence of lower limb pain, especially knee pain, is high: an observational study.

QUESTION: What is the point prevalence and 12-month prevalence of lower limb musculoskeletal pain in rural Tibet? Does this differ with gender or age? What factors that could contribute to lower limb musculoskeletal pain are commonly present? DESIGN: Observational study using an investigator-administered questionnaire and observation walks through villages. PARTICIPANTS: 499 people aged 15 years and over living in 19 rural villages of Shigatse Municipality, Tibet. RESULTS: The point prevalence of lower limb musculoskeletal pain was 40% (95% CI 34 to 46) while the 12-month prevalence was 48% (95% CI 42 to 54). In particular, the point prevalence of knee pain was 25% (95% CI 20 to 30) and the 12-month prevalence was 29% (95% CI 23 to 35), which was significantly higher than at any other site in the lower limb. On average, being female was not associated with lower limb musculoskeletal pain either currently (OR 1.3, 95% CI 0.9 to 1.9) or over the previous 12 months (OR 1.2, 95% CI 0.9 to 1.8), whereas being older than 50 years was, both for current pain (OR 4.1, 95% CI 2.8 to 6.1) and pain over the previous 12 months (OR 4.0, 95% CI 2.7 to 6.0). Observation walks through the villages revealed people squatting for sustained periods, carrying heavy loads for long distances, wearing poor quality footwear, and with severe bowing of the legs but no obesity. CONCLUSION: Lower limb musculoskeletal pain, particularly knee pain, is common in this rural Tibetan population. They live an extremely arduous life that appears to place considerable pressure on their knees.