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Published in: European Spine Journal 4/2016

01-04-2016 | Original Article

Does physical activity moderate the relationship between depression symptomatology and low back pain? Cohort and co-twin control analyses nested in the longitudinal study of aging Danish twins (LSADT)

Authors: Markus Hübscher, Jan Hartvigsen, Matthew Fernandez, Kaare Christensen, Paulo Ferreira

Published in: European Spine Journal | Issue 4/2016

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Abstract

Purpose

To investigate whether depression symptomatology is associated with low back pain (LBP) in twins aged 70+ and whether this effect depends on a person’s physical activity (PA) status.

Methods

This prospective cohort and nested case–control study used a nationally representative sample of twins. Data on depression symptomatology (modified Cambridge Mental Disorders Examination) and self-reported PA were obtained from the Longitudinal Study of Aging Danish Twins using twins without LBP at baseline. Associations between depression symptomatology (highest quartile) at baseline and LBP two years later were investigated using logistic regression analyses adjusted for sex. To examine the moderating effect of PA, we tested its interaction with depression. Associations were analysed using the complete sample of 2446 twins and a matched case–control analysis of 97 twin pairs discordant for LBP at follow-up. Odds ratios (OR) with 95 % confidence intervals (CI) were calculated.

Results

Using the whole sample, high depression scores were associated with an increased probability of LBP (OR 1.56, 95 % CI 1.22–1.99, P ≤ 0.01). There was no statistically significant interaction of light PA and depression symptomatology (OR 0.78, 95 % CI 0.46–1.35, P = 0.39) and strenuous PA and depression symptomatology (0.84, 95 % CI 0.50–1.41, P = 0.51). The case–control analysis showed similar ORs, although statistically insignificant.

Conclusions

High depression symptomatology predicted incident LBP. This effect is supposedly not attributable to genetic or shared environmental factors. Physical activity did not moderate the effect of depression symptomatology on LBP.
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Metadata
Title
Does physical activity moderate the relationship between depression symptomatology and low back pain? Cohort and co-twin control analyses nested in the longitudinal study of aging Danish twins (LSADT)
Authors
Markus Hübscher
Jan Hartvigsen
Matthew Fernandez
Kaare Christensen
Paulo Ferreira
Publication date
01-04-2016
Publisher
Springer Berlin Heidelberg
Published in
European Spine Journal / Issue 4/2016
Print ISSN: 0940-6719
Electronic ISSN: 1432-0932
DOI
https://doi.org/10.1007/s00586-015-4138-0

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