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The chiropractic workforce: a global review

Chiropractic & Manual Therapies volume 27, Article number: 36 (2019) Cite this article

Abstract

Background

The world is faced with a chronic shortage of health workers, and the World Health Organization (WHO) has estimated a global shortage of 7.2 million health workers resulting in large gaps in service provision for people with disability. The magnitude of the unmet needs, especially within musculoskeletal conditions, is not well established as global data on health work resources are scarce.

Methods

We conducted an international, cross-sectional survey of all 193 United Nation member countries and seven dependencies to describe the global chiropractic workforce in terms of the availability (numbers and where they are practising), quality (education and licensing), accessibility (entry and reimbursement), and acceptability (scope of practice and legal rights). An electronic survey was issued to contact persons of constituent member associations of the World Federation of Chiropractic (WFC). In addition, data were collected from government websites, personal communication and internet searches. Data were analysed using descriptive statistics. Worldwide density maps of the distribution of numbers of chiropractors and providers of chiropractic education were graphically presented.

Results

Information was available from 90 countries in which at least one chiropractor was present. The total number of chiropractors worldwide was 103,469. The number of chiropractors per country ranged from 1 to 77,000 (median = 10; IQR = [4–113]). Chiropractic education was offered in 48 institutions in 19 countries. Direct access to chiropractic services was available in 81 (90%) countries, and services were partially or fully covered by government and/or private health schemes in 46 (51.1%) countries. The practice of chiropractic was legally recognized in 68 (75.6%) of the 90 countries. It was explicitly illegal in 12 (13.3%) countries.

Conclusion

We have provided information about the global chiropractic workforce. The profession is represented in 90 countries, but the distribution of chiropractors and chiropractic educational institutions, and governing legislations and regulations largely favour high-income countries. There is a large under-representation in low- and middle-income countries in terms of provision of services, education and legislative and regulatory frameworks, and the available data from these countries are limited.

Background

Health workers are the engine of our health care systems. Yet, the world is faced with a chronic shortage of health workers. In 2013, the World Health Organization (WHO) estimated a global shortage of 7.2 million health workers, with 83 countries facing a health worker crisis [1].

In the twenty-first century, the world faces a new set of health challenges: a rapid increase in the number of care-seeking elderly people in the population accompanied by a rise in chronic conditions and multi-morbidity [2]. According to the World Health Survey [3], which investigated adults in 59 countries, the average prevalence of disability ranged from 11.8% in high income countries to 18.0% in low income countries. This equates to an estimated figure of more than one billion people. Musculoskeletal pain is the main cause of disability and the prevalence and burden increase with age [4]. Musculoskeletal pain causes more years lived with disability than any other condition creating a substantial and increasing unmet need for health care and rehabilitation services [4,5,6]. Health systems must face these emerging challenges by developing health policies that emphasize health care services that improve functioning [7].

In 2006, WHO established the Global Health Workforce Alliance as a common platform for action to address issues of health workforce shortage. At the end of the Alliance’s ten-year mandate, the Global Health Workforce Network [8] was established to continue the Alliance’s work by informing and maintaining high-level political engagement and support the implementation of the Global Strategy on Human Resources for Health: Workforce 2030 [9]. The Global Strategy on Human Resources for Health: Workforce 2030 aims to ensure universal availability, accessibility, acceptability, coverage and quality of health workforces within strengthened health systems (World Health Assembly 2016) [10]. Availability is the sufficient supply and stock of health workers, with the relevant competencies and skill mix that correspond to the health needs of the population. Accessibility relates to equitable access to health workers (including travel time and transport, opening hours and corresponding workforce attendance) in a disability-friendly infrastructure with referral mechanisms in place. Acceptability relates to the characteristics and ability of the workforce to treat everyone with dignity, create trust and enable or promote demand for services. Quality refers to the competencies, skills, knowledge and behaviour of the health worker as assessed according to professional norms and as perceived by users [1].

To support the implementation of the Global Strategy on Human Resources for Health: Workforce 2030, the National Health Workforce Accounts: A Handbook (NHWA) was developed to assist researchers and policy makers to describe and evaluate health workforces [10]. The underpinning framework of NHWA is aligned with the health labour market framework. It provides a comprehensive picture of the education sector and health labour market dynamics, in which the economy, population, politics and society act as drivers to attaining universal health coverage and optimal health-care services as the outcome [10]. The NHWA contains 78 core indicators divided into 10 modules which measure three crucial labour market components: education (i.e. the “input” of health workforces), labour force (i.e. the “throughput”) and serving population health needs (i.e. the “output”).

Rehabilitation as provided by chiropractors, physiotherapists and similar allied health professionals has a critical role to play in preventing and minimizing the impact of musculoskeletal conditions on associated limitations in functioning (e.g. in mobility, activities of work and daily life) and chronic disability [7]. Addressing people’s limitations in functioning may help to minimize the health, social and economic impacts of health conditions, and improve well-being. The availability of accessible and affordable rehabilitation is necessary for many individuals to remain independent, participate in education, be economically productive, and fulfil meaningful life roles within their communities. However, global data on availability are scarce. Initial findings reveal large gaps in service provision for people with disability. For example, in Zimbabwe, Malawi, Zambia and Namibia, 60 to 68% of people with disabilities expressed an unmet need for medical rehabilitation [3]. Similarly, the geographical location and actual number of chiropractors worldwide is unknown, and their characteristics only partially described. Further, gender inequality co-exists with higher unmet needs in women as well as a reduced service provision in rural areas. The magnitude and scope of unmet rehabilitation needs, especially in low- and middle-income countries requires a concerted and coordinated global action by all stakeholders [7].

Aims

We aimed to describe the chiropractic workforce worldwide in terms of the number of chiropractors, education, access, reimbursement schemes, scope of practice, and legal rights.

Using the WHO NHWA, we asked:

  1. 1.

    What is the global availability of chiropractors and where are they practising?

  2. 2.

    What is the quality of the chiropractic workforce (including education, postgraduate education, and licensing)?

  3. 3.

    What is the accessibility to chiropractic services (entry and reimbursement)?

  4. 4.

    What is the global acceptability of chiropractors (i.e. what is the scope of practice and legal rights of the chiropractic profession)?

Methods

We conducted an international, cross-sectional survey of all 193 United Nation (UN) member countries and seven dependencies (hereafter called countries). Based on lists of contact persons of constituent member associations of the World Federation of Chiropractic (WFC), one contact in each country was invited to participate on behalf of their country. Where the WFC had no contacts, data were collected from government websites or from chiropractors practising in the country found through web searches using the Google search engine. The designated contacts of the WFC were invited to participate via email in September 2016. A link in the email enabled the participant to directly access the survey using an online survey tool, Survey Monkey. A re-writable pdf copy was also available for direct email response. Two email reminders were sent to enhance the response rate (two and 4 months after the initial invitation). Further, the survey was resent to non-responders in February 2017, and subsequently, the WFC administrative team and Council members made direct contact with contacts in their regions to further encourage participation in the survey. Partial responders were prompted via email to complete requested information.

The survey

The instrument (Additional file 1) draws on previous, regular surveys of the legal status of chiropractic in WFC constituent member associations’ jurisdictions designed and posted triennially by the WFC. It included 38 questions inquiring about the: 1) legal status of chiropractic (n = 15); 2) scope of practice (n = 6); 3) privileges to order imaging, laboratory tests and prescribe drug prescription (n = 5); 4) regulations regarding care of children (n = 1); 5) sickness absence certification rights (n = 1); 6) reimbursement schemes (n = 3); 7) education (n = 5); and 8) statutory requirements of practice for foreign trained chiropractors (n = 2). Response categories were predominantly dichotomous (yes/no), categorical or multiple choice. Throughout the questionnaire, respondents had the opportunity to elaborate on answers as free text. Before releasing the survey, the questions were assessed for face and content validity by one of the WFC constituent member representatives and adapted accordingly.

Validation of data and missing data

Where possible, responses (such as legislation and number of registered DCs in a country) were systematically checked against posted data in the relevant government websites to obtain current data. If the website had no posted data, the relevant national health authority website was consulted for further information. If data were missing, data from WFC records from previous surveys were imputed when available. Emails were sent to WFC contacts to confirm the imputed data.

Data analysis

Data were analysed using descriptive statistics. Dichotomous and multi-choice variables were described using frequencies and proportions. Continuous data were described as raw numbers and as medians and interquartile ranges (IQR). Worldwide density maps of the distribution of numbers of chiropractors and chiropractic educations are graphically presented.

Results

Questions were issued to 86 country contacts. Sixty-two contacts responded (response rate of 72%). Further information was collected from WFC files, email correspondence with WFC contacts, and/or Google searches in 28 countries (Fig. 1). In total, information was available in 90 countries; 27 countries in Europe, 22 in Asia, 16 in Africa, 9 in North America and the Caribbean, 12 in South America, and 4 in Australia and the Pacific.

Fig. 1
figure1

Flowchart – included and excluded countries and dependencies

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Availability of chiropractors

In all 90 countries, at least one chiropractor was present. The total number of chiropractors worldwide was 103,469. The number of chiropractors per country ranged from one to 77,000 (median = 10; IQR = [4–113]). The median chiropractor per capita per 100,000 was 0.26 (IQR = [0.028–1.40]).

The US had the highest number of chiropractors per capita; for every 100,000 people in the US, there were 23.7 chiropractors. India had the lowest number of chiropractors per capita; for every 100,000 people in India, there were 0.0007 chiropractors. Density maps of the absolute number of chiropractors worldwide and per capita per 100,000 are presented in Fig. 2a and b.

Fig. 2
figure2

a Countries by population of chiropractors in absolute numbers. b Countries by population of chiropractors per capita per 100,000

Full size image

Quality of the chiropractic workforce

Chiropractic education was offered in 48 institutions in 19 countries. They were predominantly located in English-speaking and/or high-income countries. The number of chiropractic educational institutions in each country ranged from 1 to 18 (Fig. 3) with the majority located in the US (n = 18) and Australia (n = 4). Ten countries had only one educational institution. In 16 of the 18 countries with an educational institution, the education was accredited by an international chiropractic accreditation counsel, government/federal institution or both. Further details about institutional accreditation and requirements for practice are provided in Table 1.

Fig. 3
figure3

Countries by number of chiropractic institutions

Full size image
Table 1 Chiropractic education and requirements for practice (N = 90)
Full size table

Accessibility to chiropractic services

Direct access to chiropractic services was available in 81 (90%) countries, and medical referral was needed in only two countries, the Bahamas and Saudi Arabia. Chiropractic services were partially or fully covered by government and/or private health schemes in 46 (51.1%) countries. Details are provided in Table 2.

Table 2 Accessibility to chiropractic services and scope of practice (N = 90)
Full size table

Acceptability of chiropractors

The scope of chiropractic practice was governed by legislation or regulation in 26 (28.9%) countries and the professional title protected by legislation in 39 (43.3%) (Table 2). In 43 (47.8%) countries, chiropractors are permitted to own, operate, or prescribe x-rays, in 22 (24.4%) countries they were lawfully permitted to prescribe advanced imaging (MRI or CT), and in 34 (38.8%) countries owning, operating or prescribing diagnostic ultrasound was permitted. Full or limited rights to the prescription of pharmaceutical medication were permitted in 9 (10%) countries, and authorization of sick leave was permitted in 20 (22.2%) countries. The care of children is subject to specific regulations and/or statutory restrictions in 57 (63.3%) countries.

The practice of chiropractic was legally recognized in 68 (75.6%) of the 90 countries. It was explicitly illegal in 12 (13.3%) countries; one in Africa (Egypt), two in South America (Argentina and Columbia), four in Europe (Austria, Estonia, Greece, and Hungary), and five in Asia (Lebanon, Republic of Korea, Taiwan, Turkey and Ukraine). In the remaining 10 (11.1%) countries, chiropractic did not fall under any law or the statutory legislation is unknown. The characteristics of the statutory legislation regarding chiropractic in the 68 countries in which chiropractic was legalized are provided in Table 3. In the majority of the 68 countries (n = 48, (70.6%)), chiropractic was governed by a legal framework under national/federal or regional/state legislation or a combination, and in 44 countries (64.7%), the legislation contains provision to establish a statutory regulator. Forty-two countries (61.8%) have regulations and/or rules under the legislation to provide for registration or licensure of chiropractors.

Table 3 Statutory legislation in countries where chiropractic is legalized (N = 68)
Full size table

Discussion

We have surveyed the chiropractic workforce in all UN member countries using an electronic survey of contact persons of constituent member associations of the WFC, WFC files, personal correspondence, government websites, and Google searches. Chiropractors are available in 90 countries, but 50% percent of these have 10 or fewer chiropractors. The lowest provision of chiropractic services, both absolutely and per capita, is found in low- and middle-income countries. This is reflective of the location of chiropractic educational institutions in few, predominantly high-income countries. These institutions are accredited by government/federal institutions or international chiropractic accreditation counsels, which warrant a standard level of quality. But, many receive little or no public financial support, so access to education is for the few who can afford tuition fees. Direct access to chiropractic services is ensured in most countries, but public reimbursement schemes are few, which again limits the access to those who can afford either the service fee or private health insurance payment. Finally, we have observed variation in scope of practice. Importantly, the care of children is under regulation or restrictions in most countries, and chiropractors are only legally recognized in 68 of the 90 countries, and explicitly illegal in 12 countries.

In comparison to similar rehabilitaton professions such as physiotherapy, the chiropractic workforce is relatively small. This may partly be due to the education of physiotherapists, which is often incorportated in the faculty of medicine or rehabilitiation sciences of major univerities as opposed to the chiropractic education, which is predominantly offered at independent schools or colleges, at least in North America. Regardless, the variations in the density of the chiropractic workforce both within and across high-, middle-, and low-income countries are mirrored by other professions. The World Confederation of Physical Therapy reports an estimated number of 450,000 physical therapists worldwide with the number of physio therapists per capita per 100,000 ranging from 0.19 in Malawi to 282 in Finland [11]. When comparing to other rehabilitation providers, in the United States there are 13.8–25.4 occupational therapists for every 100,000 people and 27.3–37.2 speech language pathologists for every 100,000 people [12].

We used multiple resources to get the best possible overview of the chiropractic workforce. The number of chiropractors is a crude estimate based on membership of national or regional associations, but not all chiropractors are members of an association, and some may be members of more than one. Globally, central national registers of the human health workforce are the exception rather than the rule, and the information of rehabilitation staff is fragmented and insufficient [13]. This has been attributed to the lack of common definitions, inadequate resources needed to monitor the workforce, and little or no political determination [13].

The main data collection method was the electronic survey, but we also gathered data from web searches, WFC records and personal communication to supplement, validate and increase the granularity of the data. Despite this, we have a large proportion of missing data, and we do not know the validity or accuracy of the data collected in the survey. Responders to the survey were predominantly from countries with well-established, larger cohorts of chiropractors organized in national or regional associations, well-defined legislation, and the presence of a chiropractic educational institution. This limits the findings of this report, but is, however, reflective of the challenges associated with the of lack of chiropractic resources in many countries. From the personal communication with WFC contacts, lack of or poor internet connections, unfamiliarity with surveys, and legislative struggles in some countries, or the lack of applicability of questions in countries with unclear legislation or regulation were reported as barriers for responding. Similarly, missing data limit the generalizability of results. Finally, the survey was issued in English only, which may have led to misinterpretations of questions, or deterred some from responding to parts of or the whole survey.

In this report, we described the characteristics of the chiropractic workforce worldwide to improve our global understanding of rehabilitation resources. This report highlights the availability of chiropractic educational institutions, post-graduate training, accreditation, the active health workforce stock, governance, and health workforce policies. To fully map the chiropractic workforce in accordance to the NHWA, more information is still needed on education finances, health labour market flow, employment characteristics and working conditions, health workforce spending and remunerations, skill-mix composition for models of care, and health workforce information systems. Further, issues such as gender and ethnic inequality and underserved communities need to be investigated. Due to the large variation in numbers, legislation and scope of practice, this may be best done at national levels and perhaps undertaken alongside investigations of other rehabilitation professions, such as physiotherapy and other types of manual and exercise therapists.

Conclusion

In accordance with the WHO NHWA framework, we have provided information about the global chiropractic workforce in terms of the availability, quality, accessibility, and acceptability. The profession is represented in 90 countries, but the distribution, chiropractic educational institutions, and governing legislations and regulations largely favour high-income countries. There is a large under-representation in low- and middle-income countries in terms of provision of services, education and legislative and regulatory frameworks, and the available data from these countries are limited.

Abbreviations

EU GDPR:

European Union General Data Protection Regulation

IQR:

Inter Quartile Range

NHWA:

National Health Workforce Accounts

UN:

United Nations

WFC:

World Federation of Chiropracic

WHO:

World Health Organization

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Acknowledgements

The authors thank Ms. Sarah Villarba, World Federation of Chiropractic, for her assistance with the data collection and handling.

Funding

This study was funded by in kind contributions from the authors’ institutions. The funding bodies had no role in the design of the study; in the collection, analysis, and interpretation of data; in writing of the manuscript; or in the decision to submit the article for publication.

Availability of data and materials

All data generated and analysed during this study are included in this published article.

Author information

Affiliations

  1. Nordic Institute of Chiropractic and Clinical Biomechanics, Odense, Denmark

    Mette Jensen Stochkendahl

  2. Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Campusvej 55, DK-5230, Odense M, Denmark

    Mette Jensen Stochkendahl

  3. UOIT-CMCC Centre for Disability Prevention and Rehabilitation, 2000 Simcoe St N, Oshawa, ON, L1G 0C5, Canada

    Mana Rezai, Deborah Sutton & Pierre Côté

  4. Exercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Universidad Finis Terrae, Avda Pedro de Valdivia 1509, Providencia, Santiago, Chile

    Paola Torres

  5. Department of Chiropractic, Faculty of Science and Engineering, Room 342, Bldg. C5C West, Sydney, NSW, 2109, Australia

    Peter Tuchin

  6. World Federation of Chiropractic, 160 Eglinton Avenue East (#601), Toronto, Ontario, M4P 3B5, Canada

    Richard Brown

  7. Faculty of Health Sciences, University of Ontario Institute of Technology, Oshawa, Canada

    Pierre Côté

  8. Dalla Lana School of Public Health, University of Toronto, 155 College St Room 500, Toronto, ON, M5T 3M7, Canada

    Pierre Côté

Authors
  1. Mette Jensen Stochkendahl
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  2. Mana Rezai
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Contributions

MJS, MR, PTo, DS, PTu, RB, PC contributed to the concept and design of the study, which was led by MJS. RB and Ms. Sarah Villarba developed the survey. MJS and MR analysed and interpreted the data. MJS drafted the manuscript and all authors critically revised the article for important intellectual content and gave final approval of the version to be published.

Corresponding author

Correspondence to Mette Jensen Stochkendahl.

Ethics declarations

Authors’ information

The authors are members of the World Federation of Chiropractic Disability and Rehabilitation Committee (WFC-DRC) and the presented work was undertaken on a mandate of WFC-DRC. The committee was formed by the World Federation of Chiropractic in response to a recognized need for expert input to inform its work.

Ethics approval and consent to participate

The Regional Ethics Committee of Southern Denmark gave approval for the study (#S-20192000-13) and declared that the study does not fall within the scope of the Medical Research Involving Human Subject Act (§14, paragraph 1) [14]. Approval for data handling and storage was granted by the Research and Innovation Office at the University of Southern Denmark (#10.212). Data processing and storage was conducted in accordance with the European Union Data Protection Regulation (EU GDPR) [15]. The data were originally collected for administrative purposes, and the participants did not sign informed consent for the purpose of this research project. Participants’ consent to participate is not required under the EU GDPR, as the project did not involve personal data.

Consent for publication

Not applicable. The manuscript does not include details, images or videos relating to an individual person.

Competing interests

MJS is a society representative of Chiropractic and Manual Therapies, and PTu is a member of the editorial board, but neither had any influence over the review assignment or process. The authors declare that they have no further competing interests.

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Additional file

Additional file 1:

Survey questions and response options. (DOCX 19 kb)

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Stochkendahl, M.J., Rezai, M., Torres, P. et al. The chiropractic workforce: a global review. Chiropr Man Therap 27, 36 (2019). https://doi.org/10.1186/s12998-019-0255-x

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Keywords

  • Chiropractic
  • Rehabilitation
  • Global Health
  • Health workforce
  • Survey
  • Cross-sectional
  • Education

Chiropractic & Manual Therapies

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