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The role of mindfulness in associations among depression symptoms, sleep duration, and insulin resistance in adolescents

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Abstract

Sleep difficulties may be one explanatory factor in the association between depression and insulin resistance; yet, explicit tests of this hypothesis are lacking. We determined if there was an indirect effect of depression symptoms on insulin resistance through sleep duration in adolescents at risk for excess weight gain. We also investigated whether dispositional mindfulness moderated the interconnections among depression, sleep, and insulin resistance. Ninety adolescents (14.2 ± 1.6y; 50% female) at risk for excess weight gain (body mass index [BMI, kg/m2] z score 1.6 ± 0.6) participated in the cross-sectional, baseline phase of a health behaviors study. Depression was assessed with the Center for Epidemiologic Studies–Depression Scale, sleep duration with the Sleep Habits Survey, and mindfulness with the Mindful Attention and Awareness Scale. Homeostatic model assessment of insulin resistance was determined from fasting insulin and glucose. The product-of-coefficients method was used to test the indirect effect of depression on insulin resistance through sleep duration, accounting for age, sex, BMIz, puberty, and socioeconomic status (SES). Dispositional mindfulness was tested as a moderator of the associations among depression, sleep, and insulin resistance. There was a significant indirect effect of depression on insulin resistance through sleep duration, controlling for age, sex, BMIz, puberty, and SES, 95%CI [0.001, 0.05]. Dispositional mindfulness moderated the association between sleep duration and insulin resistance, such that lower sleep duration related to greater insulin resistance only among adolescents with lower mindfulness (p < .001). Short sleep may be one explanatory factor in the depression-insulin resistance connection in adolescents at risk for excess weight gain. Adolescents with poorer mindfulness and short sleep are at highest risk for insulin resistance, whereas higher mindfulness may be protective.

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Funding

This work was supported by the Colorado Clinical and Translational Sciences Institute [NIH/NCATS Colorado CTSA Grant Number UL1 TR002535] and the Colorado Agricultural Experiment Station [NIFA/USDA Grant Number COLO0724]; efforts of MC and NS on this project were supported by graduate research assistantships from the Colorado School of Public Health.

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E.L.C. created the first draft of the manuscript and conducted the analyses; L.D.G. and M.P. provided statistical guidance on the analyses, helped interpret the results, and edited the manuscript. M.C., N.S., and S.A.J. collected the data, managed and prepared the data, assisted in interpretation of the results, and edited the manuscript. V.J., R.M., I.C., J.L.K., and S.L.S. assisted in interpretation of the results and edited the manuscript. C.M., R.G.L., and L.B.S. designed the study, obtained funding to support the study, assisted in interpretation of the results, and edited the manuscript.

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Correspondence to Lauren B. Shomaker.

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No author has a conflict of interest to disclose.

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This study was approved by the Institutional Review Board (IRB) of Colorado State University. All study procedures were followed in accordance with the ethical standards of the Colorado State University IRB, and all parents/guardians and participants in the study provided written consent and assent, respectively.

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Clark, E.L., Gulley, L.D., Prince, M.A. et al. The role of mindfulness in associations among depression symptoms, sleep duration, and insulin resistance in adolescents. J Behav Med 44, 694–703 (2021). https://doi.org/10.1007/s10865-021-00225-x

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  • DOI: https://doi.org/10.1007/s10865-021-00225-x

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