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2 results

  • Late-life sleep duration associated with amnestic mild cognitive impairment

  • Mengya Yuan, Bo Hong, Wei Zhang, An Liu, Jinghua Wang, Yuanyuan Liu, Feng Yan, Shifu Xiao, Hua Xu, Tao Wang
  • Journal:
    International Psychogeriatrics / Volume 35 / Issue 8 / August 2023
    Published online by Cambridge University Press:
    10 May 2021, pp. 439-448
  • Objective:

    To examine the association between sleep duration in different stages of life and amnestic mild cognitive impairment (aMCI).

    Design, setting, and participants:

    A total of 2472 healthy elderly and 505 patients with aMCI in China were included in this study. The study analyzed the association between aMCI and sleep duration in different stages of life.

    Measurements:

    We compared sleep duration in different stages of life and analyzed the association between Montreal Cognitive Assessment scores and sleep duration by curve estimation. Logistic regression was used to evaluate the association between aMCI and sleep duration.

    Results:

    In the analysis, there were no results proving that sleep duration in youth (P = 0.719, sleep duration < 10 hours; P = 0.999, sleep duration ≥ 10 hours) or midlife (P = 0.898, sleep duration < 9 hours; P = 0.504, sleep duration ≥ 9 hours) had a significant association with aMCI. In the group sleeping less than 7 hours in late life, each hour more of sleep duration was associated with approximately 0.80 of the original risk of aMCI (P = 0.011, odds ratio = 0.80, 95% confidence interval = 0.68–0.95).

    Conclusions:

    Among the elderly sleeping less than 7 hours, there is a decreased risk of aMCI for every additional hour of sleep.

  • Drama of HII regions: Clustered and Triggered Star Formation

  • Jin-Zeng Li, Jinghua Yuan, Hong-Li Liu, Yuefang Wu, Ya-Fang Huang
  • Journal:
    Proceedings of the International Astronomical Union / Volume 12 / Issue S316 / August 2015
    Published online by Cambridge University Press:
    31 March 2017, pp. 129-130
    Print publication:
    August 2015
    • Article
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  • In order to understand the star formation process under the influence of H ii regions, we have carried out extensive investigations to well selected star-forming regions which all have been profoundly affected by existing massive O type stars. On the basis of multi-wavelength data from mid-infrared to millimeter collected using Spitzer, Herschel, and ground based radio telescopes, the physical status of interstellar medium and star formation in these regions have been revealed. In a relatively large infrared dust bubble, active star formation is undergoing and the shell is still expanding. Signs of compressed gas and triggered star formation have been tentatively detected in a relatively small bubble. The dense cores in the Rosette Molecular Complex detected at 1.1 mm using SMA have been speculated to have a likely triggered origin according to their spatial distribution. Although some observational results have been obtained, more efforts are necessary to reach trustworthy conclusions.