Effects of Interdisciplinary Treatment on Sickness Absence in Patients With Chronic Pain

Dalarna University (Other)
Overall Status
CT.gov ID
The Swedish Research Council (Other), Forte (Industry)

Study Details

Study Description

Brief Summary

Chronic pain is a globally prevalent condition that causes enormous social costs; largely due to sickness absence. A common intervention for patients with chronic pain problems is interdisciplinary treatment (IDT), which consists of a combination of physical exercise, cognitive behavioural therapy and work training coordinated in an interdisciplinary team. Based on data from Swedish National Registers, this study evaluates the effects of IDT on sickness absence.

Condition or Disease Intervention/Treatment Phase
  • Behavioral: interdisciplinary treatment

Detailed Description

This is a completely register-based observational cohort study. The study population is defined from the Swedish Quality Registry for Pain Rehabilitation (SQRP), which routinely aggregates data from specialist IDT pain management clinics across Sweden. SQRP contains information on the exposure/intervention: whether a patient that visited a SQRP-affiliated clinic was allocated to an IDT program (test) or not (control); t0 defined as the day of the IDT assessment. Microdata from SQRP is linked to other Swedish registers via the unique personal identification number held by all Swedish residents. Outcome data is obtained from the Swedish Social Insurance Agency. Registers managed by the National Board of Health and Welfare include data on dispensed prescription pharmaceuticals and specialist health care.

Markov multistate survival-based methods will be used to compare the sickness absence between groups. Specifically, length of stay per sickness absence state (no sickness absence, sick leave, and disability pension) will be compared over five years from t0. Both crude and adjusted estimates will be presented. Adjustment will be made based on our hypothesis about causal relationships and include: history of sickness absence, sociodemographics (age, sex, sociodemographic status), patient disability (emotional distress, everyday interference, and confidence in future improvement), and governmental policy (IDT assessment year and geographical region of IDT clinic).

Study Design

Study Type:
Actual Enrollment :
25000 participants
Observational Model:
Time Perspective:
Official Title:
Effects of Interdisciplinary Treatment on Sickness Absence in Patients With Chronic Pain
Actual Study Start Date :
Jan 1, 2009
Actual Primary Completion Date :
Dec 1, 2016
Actual Study Completion Date :
Dec 1, 2016

Arms and Interventions

Arm Intervention/Treatment
IDT patients

Allocated to an IDT program

Behavioral: interdisciplinary treatment
Interdisciplinary treatment (IDT) distinguishes itself as an interdisciplinary-coordinated (e.g., physician, occupational therapist, physiotherapist, and psychologist) intervention using a bio-psycho-social view of chronic pain. The MMR continues over a lengthy period with a common goal and generally includes patient education, supervised physical activity, simulated work training, and cognitive behavioural therapy (CBT). The exact composition of these MMR components depends on initial evaluations of the patients health status and furhter follow-up testing. The MMR interventional components can act independently and interdependently, resulting in combined effects due to known and unknown mechanisms; the effects are intended to be greater than the sum of its components.
Other Names:
  • multimodal rehabilitation
  • Non-IDT patients

    Not allocated to an IDT program

    Outcome Measures

    Primary Outcome Measures

    1. Sickness absence [5 years]

      Length of stay per sickness absence state: no sickness absence, sick leave, disability pension

    Eligibility Criteria


    Ages Eligible for Study:
    18 Years to 60 Years
    Sexes Eligible for Study:
    Accepts Healthy Volunteers:
    Inclusion Criteria:
    • IDT startyear: 2009-2016

    • Age 18-60 yeras

    • Pain duration of minimum 90 days

    Exclusion Criteria:
    • Cancer in the previous 5 years

    • An IDT assessment in the previous 2 years

    • Full or partial disability pension in the year preceding the IDT assessment

    Contacts and Locations


    No locations specified.

    Sponsors and Collaborators

    • Dalarna University
    • The Swedish Research Council
    • Forte


    None specified.

    Study Documents (Full-Text)

    None provided.

    More Information


    None provided.
    Responsible Party:
    Bjorn Ang, Professor, Dalarna University
    ClinicalTrials.gov Identifier:
    Other Study ID Numbers:
    • Dalarna University
    First Posted:
    Oct 22, 2020
    Last Update Posted:
    Oct 22, 2020
    Last Verified:
    Oct 1, 2020
    Studies a U.S. FDA-regulated Drug Product:
    Studies a U.S. FDA-regulated Device Product:
    Additional relevant MeSH terms:

    Study Results

    No Results Posted as of Oct 22, 2020