Sleepiness/Alertness on a Simulated Night Shift Schedule and Morningness–Eveningness Tendency

Hilliker, N A; Muehlbach, Mark J.; Schweitzer, Paula K.; Walsh, James K.

doi:10.1093/sleep/15.5.430

Cited by 46 publications

(30 citation statements)

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“…Shift workers who are defined as having a morning chronotype by the MEQ have a higher level of sleepiness when they work on a night shift (Hilliker, Muehlbach, Schweitzer, & Walsh, 1992). Furthermore, workers in New Zealand with an evening chronotype as defined by the MEQ were reported as likely to take regular night shift duties (Paine, Gander, & Travier, 2006).…”

Section: Discussionmentioning

confidence: 99%

The Relationships Among Sleep Quality and Chronotype, Emotional Disturbance, and Insomnia Vulnerability in Shift Nurses

Lee

Chen

Tseng

et al. 2015

Journal of Nursing Research

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Section: Discussionmentioning

confidence: 99%

The Relationships Among Sleep Quality and Chronotype, Emotional Disturbance, and Insomnia Vulnerability in Shift Nurses

Lee

Chen

Tseng

et al. 2015

Journal of Nursing Research

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“…Actigraphy measurements of rest -activity cycles A watch-like wrist actigraph (Ambulatory Monitoring, Inc., AMI), worn on the nondominant wrist, was used to record a patient's movement pattern over a 4 -7-day period (Hauri and Wisbey, 1992;Hilliker et al, 1992). Patients at VAMC had all activity measurements performed in the week prior to therapy in the ambulatory/home setting.…”

Section: Procedures and Summary Of Measurement Toolsmentioning

confidence: 99%

Circadian function in patients with advanced non-small-cell lung cancer

et al. 2005

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This study aimed to evaluate whether patients with advanced non-small-cell lung cancer experience disrupted rest -activity daily rhythms, poor sleep quality, weakness, and maintain attributes that are linked to circadian function such as fatigue. This report describes the rest -activity patterns of 33 non-small-cell lung cancer patients who participated in a randomised clinical trial evaluating the benefits of melatonin. Data are reported on circadian function, health-related quality of life (QoL), subjective sleep quality, and anxiety/depression levels prior to randomisation and treatment. Actigraphy data, an objective measure of circadian function, demonstrated that patients' rest -activity circadian function differs significantly from control subjects. Our patients reported poor sleep quality and high levels of fatigue. Ferrans and Powers QoL Index instrument found a high level of dissatisfaction with healthrelated QoL. Data from the European Organization for Research and Treatment for Cancer reported poor capacity to fulfil the activities of daily living. Patients studied in the hospital during or near chemotherapy had significantly more abnormal circadian function than those studied in the ambulatory setting. Our data indicate that measurement of circadian sleep/activity dynamics should be accomplished in the outpatient/home setting for a minimum of 4 -7 circadian cycles to assure that they are most representative of the patients' true condition. We conclude that the daily sleep/activity patterns of patients with advanced lung cancer are disturbed. These are accompanied by marked disruption of QoL and function. These data argue for investigating how much of this poor functioning and QoL are actually caused by this circadian disruption, and, whether behavioural, light-based, and or pharmacologic strategies to correct the circadian/sleep activity patterns can improve function and QoL.

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“…eveningness) sleep-wake schedules are usually classified, respectively, as Morningtypes (M-types) and Evening-types (E-types); those with in-between sleep-wake preference are categorized as Intermediate-types (I-types) (Horne & Ö stberg, 1976). More particularly, it has been suggested that eveningness could lead to better adaptability to shift work, based on evidence of their higher subjective and objective circadian adaptation to night shifts (Costa, 2003;Costa et al, 2014;Crowley et al, 2003;Gander et al, 1993;Härmä, 1993;Ostberg, 1973), sleep quality and alertness and levels of subjective job satisfaction and quality of life (Hilliker et al, 1992;Saksvik et al, 2011;Smith et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Day and night shift schedules are associated with lower sleep quality in Evening-types

Martin

Laberge

Sasseville

et al. 2015

Chronobiology International

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Eveningness has been suggested as a facilitating factor in adaptation to shift work, with several studies reporting evening chronotypes (E-types) as better sleepers when on night shifts. Conversely, eveningness has been associated with more sleep complaints during day shifts. However, sleep during day shifts has received limited attention in previous studies assessing chronotypes in shift workers. Environmental light exposure has also been reported to differ between chronotypes in day workers. Activity is also known to provide temporal input to the circadian clock. Therefore, the aim of this study was to compare objective sleep, light exposure and activity levels between chronotypes, both during the night and day shifts. Thirty-nine patrol police patrol officers working on a fast rotating shift schedule (mean age ± SD: 28.9 ± 3.2 yrs; 28 males) participated in this study. All subjects completed the Morningness-Eveningness Questionnaire (MEQ). Sleep and activity were monitored with actigraphy (Actiwatch-L; Mini-Mitter/Respironics, Bend, OR) for four consecutive night shifts and four consecutive day shifts (night work schedule: 00:00 h-07:00 h; day work schedule: 07:00 h-15:00 h). Sleep and activity parameters were calculated with Actiware software. MEQ scores ranged from 26 to 56; no subject was categorized as Morning-type. E-types (n = 13) showed significantly lower sleep efficiency, longer snooze time and spent more time awake after sleep onset than Intermediate-types (I-types, n = 26) for both the night and day shifts. E-types also exhibited shorter and more numerous sleep bouts. Furthermore, when napping was taken into account, E-types had shorter total sleep duration than I-types during the day shifts. E-types were more active during the first hours of their night shift when compared to I-types. Also, all participants spent more time active and had higher amount of activity per minute during day shifts when compared to night shifts. No difference was found regarding light exposure between chronotypes. In conclusion, sleep parameters revealed poorer sleep quality in E-types for both the night and day shifts. These differences could not be explained by sleep opportunity, light exposure or activity levels. This study challenges the notion that E-types adapt better to night shifts. Further studies must verify whether E-types exhibit lower sleep quality than Morning-types.

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Sleepiness/Alertness on a Simulated Night Shift Schedule and Morningness–Eveningness Tendency

Cited by 46 publications

References 0 publications

The Relationships Among Sleep Quality and Chronotype, Emotional Disturbance, and Insomnia Vulnerability in Shift Nurses

The Relationships Among Sleep Quality and Chronotype, Emotional Disturbance, and Insomnia Vulnerability in Shift Nurses

Circadian function in patients with advanced non-small-cell lung cancer

Day and night shift schedules are associated with lower sleep quality in Evening-types

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