Related Experiment Video
Updated: Jul 14, 2026

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder
Published on: April 26, 2024
Grouped comparisons of sleep quality for new and personal bedding systems
Bert H Jacobson1, Tia J Wallace, Doug B Smith
1School of Applied Health and Educational Psychology, Applied Musculoskeletal and Human Physiology Research Laboratory, Oklahoma State University, Stillwater, OK 74078, USA. bert.jacobson@okstate.edu
Abstract:
The purpose of this study was to compare sleep comfort and quality between personal and new bedding systems. A convenience sample (women, n=33; men, n=29) with no clinical history of disturbed sleep participated in the study. Subjects recorded back and shoulder pain, sleep quality, comfort, and efficiency for 28 days each in their personal beds (pre) and in new medium-firm bedding systems (post). Repeated measures ANOVAs revealed significant improvement between pre- and post-test means for all dependent variables. Furthermore, reduction of pain and stiffness and improvement of sleep comfort and quality became more prominent over time. No significant differences were found for the groupings of age, weight, height, or body mass index. It was found that for the cheapest category of beds, lower back pain was significantly (p<0.01) more prominent than for the medium and higher priced beds. Average bed age was 9.5yrs. It was concluded that new bedding systems can significantly improve selected sleep variables and that continuous sleep quality may be dependent on timely replacement of bedding systems.
Related Concept Videos
Friedman Two-way Analysis of Variance by Ranks
Blind Procedures
Substance Use Disorders Affecting Sleep
Understanding the concepts of physical dependence,...
Management of Insomnia
Sleep-Wake Cycles
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
Understanding Sleep
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...

