Association of chronotype as assessed by the midpoint of sleep with the dietary intake and health-related quality of life for elderly Japanese women

Mito, Natsuko; Fujimoto, Eka; Sasaki, Satoshi

doi:10.1017/jns.2021.16

Cited by 8 publications

(6 citation statements)

References 57 publications

(84 reference statements)

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“…The association of poor health with evening preference and late weekend sleep timing was previously noted [28,29]. However, little is known about the contribution of a larger weekday sleep insufficiency in E-types compared to M-types.…”

Section: Discussionmentioning

confidence: 93%

The Irrecoverable Loss in Sleep on Weekdays of Two Distinct Chronotypes Can Be Equalized by Permitting a >2 h Difference in Waking Time

et al. 2022

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Background: Our work/study culture is biased towards the circadian clocks of “morning types”, whereas “evening types” are forced to advance their weekday waking times relative to weekend waking times. Since the experimental research consistently reveals a >2 h difference between these two chronotypes in the positions of their endogenous circadian phases, we hypothesized the necessity to permit a >2 h difference between them in weekday waking times to equalize their irrecoverable loss in sleep on weekdays. Methods: A total of 659 and 1106 participants of online surveys identified themselves as morning and evening types, respectively. The hypothesis was tested by applying a model of sleep–wake regulation for simulating sleep times reported by 245 lecturers of these two types, and by comparison of sleep times of these types among these lecturers and 1520 students. Results: The hypothesis was supported by results showing that, if, on weekdays, an “average” morning type wakes at 6 a.m., the equalization of the weekday sleep loss of the two chronotypes would require the waking time of an “average” evening type to be no earlier than 8 a.m. Conclusions: These results may be implemented in a model-based methodology for the correction of weekday waking times to equalize weekday sleep loss.

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Section: Discussionmentioning

confidence: 93%

The Irrecoverable Loss in Sleep on Weekdays of Two Distinct Chronotypes Can Be Equalized by Permitting a >2 h Difference in Waking Time

et al. 2022

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“…Some studies used one single question to assess the chronotypes ( 33 , 34 ). MSF was used in 3 studies as a metric of chronotype ( 8 , 9 , 16 ).…”

Section: Resultsmentioning

confidence: 99%

“…However, among the studies with non-shift workers, discrepancy existed in the association between chronotypes and obesity. Several large population-based cross-sectional studies did not find an association between late chronotype and adiposity (8)(9)(10)(11). A population-based longitudinal study revealed that the evening energy intake was associated with obesity, regardless of chronotype (12).…”

Section: Introductionmentioning

confidence: 99%

The association between metabolic parameters and evening chronotype and social jetlag in non-shift workers: A meta-analysis

et al. 2022

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AimsThe aim of the study was to evaluate the association between evening chronotype and social jetlag (SJL) with obesity, blood glucose and lipid levels in non-shift working adults.MethodsThe databases of MEDLINE, EMBASE and Cochrane Reviews were searched for studies analyzing the metabolic parameters among groups of different chronotypes or SJL until Feb 2022. Weighted mean difference (WMD) and 95% confidence intervals (CI) were used to analyze the association between these parameters and chronotypes or SJL.ResultsA total of 27 studies were included in this meta-analysis. Compared with morning chronotype, the participants with evening chronotype had higher body mass index (BMI) (WMD= 0.44 kg/m2, 95%CI, 0.30 to 0.57 kg/m2, p<0.001), higher fasting blood glucose level (WMD= 5.83mg/dl, 95%CI, 3.27to 8.38 mg/dl, p<0.001), higher total cholesterol level (WMD= 6.63mg/dl, 95%CI, 0.69 to 12.56 mg/dl, p=0.03), and lower high density lipoprotein cholesterol (HDL-C) level (WMD= -1.80mg/dl, 95%CI, -2.30 to -1.31 mg/dl, p<0.001). Compared with the participants with small SJL, the participants with large SJL had larger waist circumference (WMD= 0.80cm, 95%CI, 0.77 to 0.83cm, p<0.001).ConclusionsEvening chronotype and SJL were associated with obesity and unfavorable metabolic parameters of glucose and lipid metabolism.Systematic Review Registrationhttps://www.crd.york.ac.uk/PROSPERO/, identifier CRD42022303401.

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“…Sleep midpoint is calculated by the median time point between fall asleep and wake-up time and serves as an indicator of chronotype. 13 …”

Section: Methodsmentioning

confidence: 99%

“… 12 Sleep midpoint is the median of sleep onset and offset, and has been used to assess chronotype. 13 …”

Section: Introductionmentioning

confidence: 99%

Sleep Disparities Across Pregnancy: A Michigan Cohort Study

Yang

Jansen

Dunietz

et al. 2023

Women's Health Reports

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Introduction: Poor sleep health during pregnancy is related to adverse pregnancy outcomes. This study aims to identify sociodemographic characteristics associated with sleep health during pregnancy and to examine how they relate to changes in sleep during pregnancy. Materials and Methods: Participants ( n = 458) were from the Michigan Archive for Research on Child Health, which is a prospective pregnancy cohort. Sociodemographic characteristics and self-reported sleep timing and quality were collected in phone interviews. This longitudinal study collected sleep parameters once during the early trimesters and once during the third trimester. Fall asleep and wake-up times were used to calculate sleep duration and sleep midpoint. Results: Compared to the third trimester, sleep duration was 12 minutes longer ( p = 0.02), fall asleep time was 21 minutes earlier ( p < 0.001), and the midpoint of sleep was 12 minutes earlier ( p = 0.01) in early trimesters. Shorter sleep duration was noted in younger women. Sleep midpoint was later in those who were younger, overweight, or obese, racial minorities, unmarried, and with lower educational levels or socioeconomic status, and who smoked before pregnancy after adjusting for covariates. After controlling for confounders, women who were not working for pay had higher likelihood of reduced sleep duration, and women who were unmarried were more likely to have a delayed sleep midpoint in the third trimester compared to the early trimesters. Conclusions: This study suggests that sleep parameters changed during pregnancy and sleep health differed by sociodemographic characteristics. Understanding sleep disparities could help with early detection of at-risk populations during prenatal care.

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Association of chronotype as assessed by the midpoint of sleep with the dietary intake and health-related quality of life for elderly Japanese women

Cited by 8 publications

References 57 publications

The Irrecoverable Loss in Sleep on Weekdays of Two Distinct Chronotypes Can Be Equalized by Permitting a >2 h Difference in Waking Time

The Irrecoverable Loss in Sleep on Weekdays of Two Distinct Chronotypes Can Be Equalized by Permitting a >2 h Difference in Waking Time

The association between metabolic parameters and evening chronotype and social jetlag in non-shift workers: A meta-analysis

Sleep Disparities Across Pregnancy: A Michigan Cohort Study

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