Adjusted models show that an increase in difficulty initiating and maintaining sleep was significantly associated with a change in Mental Component Summary (MCS) scales, while increasing severity of excessive daytime sleepiness measured by the Epworth Sleepiness Scale was associated with a change in both MCS and Physical Component Summary (PCS) scales.
Although severity of sleep disordered breathing (SDB) measured by mean respiratory disturbance index (RDI) increased from 8.1 at baseline to 10.9 at follow-up, multiple linear regression models show no significant association between change in RDI and changes in PCS or MCS. The authors suggest that in patients with SDB, the presence of excessive daytime sleepiness determines whether there will be an impact on quality of life.
According to lead author Graciela E. Silva, PhD, assistant professor in the College of Nursing and Health Innovation at Arizona State University, the results provide important and surprising insights regarding the relationship between sleep and quality of life.
"While we were expecting an association between quality of sleep and quality of life, it was surprising that we did not find a significant association between objective measures of quality of sleep and quality of life, but that only subjective measures of sleep were associated with quality of life," said Silva. "These findings signal to the importance of perception of quality of sleep on quality of life."
The cross-sectional, retrospective study obtained polysomnographic and clinical data from 3,078 patients who were included in the baseline examination of the Sleep Heart Health Study (SHHS), a multi-center longitudinal study of participants over the age of 40.
The mean age of participants was 62 years at baseline and 67 years at follow-up. Fifty-five percent were women, and most were Caucasian (75 percent) and married (77 percent). Coronary heart disease was more prevalent in men, and respiratory disease was more prominent in women. Measures of quality of life were obtained using the PCS and MCS scales of the Medical Outcomes Study Short-Form Health questionnaire. The primary exposure was change in the RDI obtained from unattended overnight polysomnograms performed approximately five years apart.
Results show that the mean PCS dropped from 48.5 at baseline to 46.3 at follow-up, while the mean MCS increased slightly from 54.1 to 54.8. Significantly lower scores for women than men were seen at baseline and follow-up for the PCS and MCS. Hispanics/Mexican Americans had lower baseline MCS and PCS scores compared with the other ethnic groups. Obese subjects had lower PCS scores than non-obese participants at baseline and follow-up; however, no difference was found for MCS at either survey. Scores for both summary scales were lower for subjects with respiratory diseases and those taking sleeping pills, while PCS but not MCS scores were significantly lower for subjects with coronary heart disease.
Findings suggest that physical limitations imposed by the presence of obesity, coronary heart disease and respiratory disease adversely impact physical components of quality of life. The authors state that primary treatment to reduce morbidity and symptoms related to these conditions would ultimately improve sleep quality.
Sleep is the official journal of the Associated Professional Sleep Societies, LLC (APSS), a joint venture of the American Academy of Sleep Medicine and the Sleep Research Society. The APSS publishes original findings in areas pertaining to sleep and circadian rhythms. Sleep, a peer-reviewed scientific and medical journal, publishes 12 regular issues and 1 issue comprised of the abstracts presented at the Sleep Meeting of the APSS.
For a copy of the study, "Longitudinal Evaluation of Sleep-Disordered Breathing and Sleep Symptoms with Change in Quality of Life: The Sleep Heart Health Study (SHHS)," or to arrange an interview with the study's author, please contact Kelly Wagner, AASM public relations coordinator, at (708) 492-0930, ext. 9331, or firstname.lastname@example.org.
AASM is a professional membership organization dedicated to the advancement of sleep medicine and sleep-related research. As the national accrediting body for sleep disorders centers and laboratories for sleep related breathing disorders, the AASM promotes the highest standards of patient care. The organization serves its members and advances the field of sleep health care by setting the clinical standards for the field of sleep medicine, advocating for recognition, diagnosis and treatment of sleep disorders, educating professionals dedicated to providing optimal sleep health care and fostering the development and application of scientific knowledge.
Kelly Wagner | EurekAlert!
Drought hits rivers first and more strongly than agriculture
06.09.2018 | Max-Planck-Institut für Biogeochemie
Landslides triggered by human activity on the rise
23.08.2018 | European Geosciences Union
The building blocks of matter in our universe were formed in the first 10 microseconds of its existence, according to the currently accepted scientific picture. After the Big Bang about 13.7 billion years ago, matter consisted mainly of quarks and gluons, two types of elementary particles whose interactions are governed by quantum chromodynamics (QCD), the theory of strong interaction. In the early universe, these particles moved (nearly) freely in a quark-gluon plasma.
This is a joint press release of University Muenster and Heidelberg as well as the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt.
Then, in a phase transition, they combined and formed hadrons, among them the building blocks of atomic nuclei, protons and neutrons. In the current issue of...
Thin-film solar cells made of crystalline silicon are inexpensive and achieve efficiencies of a good 14 percent. However, they could do even better if their shiny surfaces reflected less light. A team led by Prof. Christiane Becker from the Helmholtz-Zentrum Berlin (HZB) has now patented a sophisticated new solution to this problem.
"It is not enough simply to bring more light into the cell," says Christiane Becker. Such surface structures can even ultimately reduce the efficiency by...
A study in the journal Bulletin of Marine Science describes a new, blood-red species of octocoral found in Panama. The species in the genus Thesea was discovered in the threatened low-light reef environment on Hannibal Bank, 60 kilometers off mainland Pacific Panama, by researchers at the Smithsonian Tropical Research Institute in Panama (STRI) and the Centro de Investigación en Ciencias del Mar y Limnología (CIMAR) at the University of Costa Rica.
Scientists established the new species, Thesea dalioi, by comparing its physical traits, such as branch thickness and the bright red colony color, with the...
Scientists have succeeded in observing the first long-distance transfer of information in a magnetic group of materials known as antiferromagnets.
An international team of researchers has mapped Nemo's genome, providing the research community with an invaluable resource to decode the response of fish to...
03.09.2018 | Event News
27.08.2018 | Event News
17.08.2018 | Event News
20.09.2018 | Earth Sciences
20.09.2018 | Earth Sciences
20.09.2018 | Physics and Astronomy