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01.12.2017 | Research article | Ausgabe 1/2017 Open Access

BMC Musculoskeletal Disorders 1/2017

Psychological predictors of change in the number of musculoskeletal pain sites among Norwegian employees: a prospective study

Zeitschrift:
BMC Musculoskeletal Disorders > Ausgabe 1/2017
Autoren:
Jan Olav Christensen, Sissel Johansen, Stein Knardahl
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1186/​s12891-017-1503-7) contains supplementary material, which is available to authorized users.

Abstract

Background

The pathogenesis of syndromes of widespread musculoskeletal pain remains an enigma. The present study sought to determine if psychological states, job satisfaction, pain intensity, and sleep problems contributed to the spread and decline of the number of musculoskeletal pains.

Methods

A sample of 2989 Norwegian employees completed a questionnaire at baseline and follow-up 2 years later. Data were analyzed with multinomial and ordinal logistic regression analyses to determine effects on direction and degree of change of number of pain sites (NPS).

Results

After adjustment for sex, age, skill level, and number of pain sites at baseline, increases in the number of pain sites from baseline to follow-up were predicted by emotional exhaustion, mental distress, having little surplus, feeling down and sad, sleep disturbances, and intensity of headache. Decreases were predicted by low levels of emotional exhaustion, mental distress, sleep disturbances, restlessness, and lower intensity of headache, neck pain, shoulder pain, and back pain. Higher numbers of pain sites at baseline were associated with reduction of number of pain sites and lower likelihood of spread. Some factors that did not predict whether decrease or increase occurred were nevertheless associated with the degree of decrease (depression, anxiety, having surplus, self-efficacy) or increase (anxiety).

Conclusions

Several psychological and physiological factors predicted change in the number of pain sites. There is a need for further investigations to identify possible mechanisms by which psychological and behavioral factors propagate the spread of pain.
Zusatzmaterial
Additional file 1: Table S1. Descriptives for NPS and ΔNPS. Table S2. Descriptives for all predictors. Table S3.Regressions with NPS “direction of change” as outcome for the final study sample and the full sample prior to executing selection criteria. Table S4. Regressions with NPS “direction of change” as outcome for categorized predictors. (DOCX 36 kb)
12891_2017_1503_MOESM1_ESM.docx
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