The Influence of Different Factors on Workers' Disability Due to Low Back Pain

NCT00667316 | Completed DMC

• 1 other identifier: FK-I-25
• Study Type: observational
• Target: 7,300
• Locations: 1 country
• Sites: 1

Brief Summary

The purpose of this study is to determine, in Spanish workers, the influence of different factors (personal, psychological, work related and clinical) on the risk of being on sick leave during the 18 months after baseline assessment, and on the duration of that sick leave.

Conditions

Low Back Pain

Keywords

low back pain; workers; disability; sick leave

Outcome Measures

Primary Outcomes (1)

• The influence of different factors on risk of sick leave for low back pain

  18 months

Study Arms (1)

A

Workers from companies and workers' health care organizations who go for their periodic medical checkup.

Behavioral: Set of questionnaires (respondent)

Interventions

Set of questionnaires (respondent) BEHAVIORAL

A set of questionnaires to determine risk factors for sick leave due to low back pain.

A

Eligibility Criteria

• Age: 18 Years - 65 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

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

You may qualify if:

• 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

You may not qualify if:

• 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

Sponsors & Collaborators

• Kovacs Foundation: lead

Study Sites (1)

Kovacs Foundation

Palma de Mallorca, Balearic Islands, 07012, Spain

Location

Related Publications (4)

• Guo HR, Tanaka S, Cameron LL, Seligman PJ, Behrens VJ, Ger J, Wild DK, Putz-Anderson V. Back pain among workers in the United States: national estimates and workers at high risk. Am J Ind Med. 1995 Nov;28(5):591-602. doi: 10.1002/ajim.4700280504.

  PMID: 8561169 BACKGROUND

• Turner JA, Franklin G, Fulton-Kehoe D, Sheppard L, Wickizer TM, Wu R, Gluck JV, Egan K. Worker recovery expectations and fear-avoidance predict work disability in a population-based workers' compensation back pain sample. Spine (Phila Pa 1976). 2006 Mar 15;31(6):682-9. doi: 10.1097/01.brs.0000202762.88787.af.

  PMID: 16540874 BACKGROUND

• Kovacs FM, Muriel A, Castillo Sanchez MD, Medina JM, Royuela A; Spanish Back Pain Research Network. Fear avoidance beliefs influence duration of sick leave in Spanish low back pain patients. Spine (Phila Pa 1976). 2007 Jul 15;32(16):1761-6. doi: 10.1097/BRS.0b013e3180b9f5f7.

  PMID: 17632397 BACKGROUND

• Seco-Calvo J, Royuela A, Rodriguez-Perez V, Kovacs F. Predicting low back pain-related absenteeism in the Spanish general working population. Occup Environ Med. 2026 Jan 21;82(11):547-555. doi: 10.1136/oemed-2025-110435.

  PMID: 41443770 DERIVED

MeSH Terms

Conditions

Low Back Pain

Interventions

Surveys and Questionnaires

Condition Hierarchy (Ancestors)

Back Pain; Pain; Neurologic Manifestations; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

Data Collection; Epidemiologic Methods; Investigative Techniques; Health Care Evaluation Mechanisms; Quality of Health Care; Health Care Quality, Access, and Evaluation; Public Health; Environment and Public Health

Study Officials

• Francisco M Kovacs, MD, PhD

  Kovacs Foundation, Palma de Mallorca, 07012, Spain

  STUDY DIRECTOR

• Mario Gestoso, MD

  Kovacs Foundation,Palma de Mallorca, Spain

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: OTHER
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Director of Scientific Department, Kovacs Foundation

Study Record Dates

• First Submitted: April 24, 2008
• First Posted: April 28, 2008
• Study Start: February 1, 2008
• Primary Completion: June 1, 2021
• Study Completion: December 1, 2021
• Last Updated: September 4, 2025

Record last verified: 2025-08

Locations

ES (1)