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Published in: BMC Musculoskeletal Disorders 1/2022

Open Access 01-12-2022 | Magnetic Resonance Imaging | Research

Association of lumbar disc degeneration with low back pain in middle age in the Northern Finland Birth Cohort 1966

Authors: Teija Mertimo, Jaro Karppinen, Jaakko Niinimäki, Roberto Blanco, Juhani Määttä, Markku Kankaanpää, Petteri Oura

Published in: BMC Musculoskeletal Disorders | Issue 1/2022

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Abstract

Background

Although it has been suggested that lumbar disc degeneration (LDD) is a significant risk factor for low back pain (LBP), its role remains uncertain. Our objective was to clarify the association between LDD and LBP and whether mental distress modifies the association.

Methods

Participants of a birth cohort underwent 1.5-T lumbar magnetic resonance imaging at the age of 47. The association between the sum score of LDD (Pfirrmann classification, range 0–15) and LBP (categorized into “no pain”, “mild-to-moderate pain”, “bothersome-and-frequent pain”) was assessed using logistic regression analysis, with sex, smoking, body mass index, physical activity, occupational exposure, education, and presence of Modic changes and disc herniations as confounders. The modifying role of mental distress (according to the Hopkins Symptom Check List-25 [HSCL-25], the Beck Depression Inventory and the Generalized Anxiety Disorder Scale) in the association was analyzed using linear regression.

Results

Of the study population (n = 1505), 15.2% had bothersome and frequent LBP, and 29.0% had no LBP. A higher LDD sum score increased the odds of belonging to the “mild-to-moderate pain” category (adjusted OR corresponding to an increase of one point in the LDD sum score 1.11, 95% CI 1.04–1.18, P = 0.003) and the “bothersome-and-frequent pain” category (adjusted OR 1.20, 95% CI 1.10–1.31, P < 0.001), relative to the “no pain” category. Mental distress significantly modified the association between LDD and LBP, as a linear positive association was consistently observed among individuals without mental distress according to HSCL-25 (adjusted B 0.16, 95% CI 0.07–0.26, P < 0.001), but not among individuals with higher mental distress.

Conclusions

LDD was significantly associated with both mild-to-moderate and bothersome-and-frequent LBP. However, the co-occurrence of mental distress diminished the association between LDD and LBP bothersomeness. Our results strongly suggest that mental symptoms affect the pain experience.
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Metadata
Title
Association of lumbar disc degeneration with low back pain in middle age in the Northern Finland Birth Cohort 1966
Authors
Teija Mertimo
Jaro Karppinen
Jaakko Niinimäki
Roberto Blanco
Juhani Määttä
Markku Kankaanpää
Petteri Oura
Publication date
01-12-2022
Publisher
BioMed Central
Published in
BMC Musculoskeletal Disorders / Issue 1/2022
Electronic ISSN: 1471-2474
DOI
https://doi.org/10.1186/s12891-022-05302-z

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