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7300 workers studied to predict back pain disability

NCT ID NCT00667316

Knowledge-focused Sponsor: Kovacs Foundation Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study followed 7300 Spanish workers for 18 months to see which personal, psychological, work-related, and clinical factors increase the risk of taking sick leave due to low back pain. Participants filled out questionnaires at checkups. The goal was to understand what leads to disability, not to test a treatment.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this could help employers and doctors predict who is at risk for long-term disability from back pain and design better prevention programs.
What could go wrong
This is an observational study, not a treatment trial. It identifies risk factors but does not test any intervention, so it cannot directly improve outcomes.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 7,300 people

The number the study aims to enrol. It can still change while the study runs.

Start date

Feb 2008

Finished

Dec 2021

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Workers from companies and workers' health care organizations who are currently active.

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Subjects who get their checkups at participating health services * With a labor contract that won't make it likely that they stop work before the next 18 months, for causes other than their health * Who sign the informed consent form Exclusion Criteria: * Don't sign the informed consent form * Inability to fill our the questionnaires * Bedridden * Rheumatologic inflammatory disease, cancer or fibromyalgia * Suspicion of fibromyalgia * Red flags for systemic disease * Criteria for surgery * Criteria for urgent referral to surgery

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Conditions

The condition(s) this trial relates to.

Low Back Pain

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Low back pain

Contacts and locations

Locations

  • Kovacs Foundation

    Palma de Mallorca, Balearic Islands, 07012, Spain

More trials for these conditions

Other studies related to the condition(s) this trial covers.