ArticleEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2025
Association between eveningness and low back pain among public servants in Japan: a cross-sectional analysis of the Aichi Workers' Cohort Study.
Article in European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeLow back pain (LBP) is a common occupational health problem. Chronotype, an individual's preferred timing of activity and sleep, has been linked to pain perception. Previous studies have found a potential association between chronotype and LBP, although the findings were limited by small sample sizes and restricted population types. We investigated the association between evening chronotype (eveningness) and LBP in a cohort comprising public servants of various ages.
methodsWe conducted a cross-sectional analysis of 4728 full-time public servants in Japan. LBP was assessed using a self-reported question. Individuals' chronotypes were determined using the reduced Morningness-Eveningness Questionnaire. The association between chronotype and LBP was analyzed using the chi-squared test and multiple logistic regression models adjusted for age, sex, occupation, overtime work, use of the internet/email, body mass index, smoking status, exercise habits, sedentary behavior, sleep duration, sleep medication use, and depressive symptoms.
resultsIn total, 30% of the subjects reported LBP. The most common chronotype was intermediate type (51%), followed by morningness (38%) and eveningness (11%). A significant association between eveningness and LBP was observed. After adjusting for potential confounders, individuals with eveningness had a higher prevalence of LBP than those with morningness (36.2% vs. 28.7%; odds ratio: 1.46; 95% confidence interval: 1.16-1.83).
conclusionEveningness was statistically associated with LBP in a cohort of public servants. The present findings would strengthen the association's generalizability to more varied populations.
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