• 대한의용생체공학회:의공학회지
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• 제37권4호
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• pp.127-133
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• 2016

This study proposes the feasibility for automatic classification of sleep/wakefulness using nasal pressure in patients with sleep-disordered breathing (SDB). First, SDB events were detected using the methods developed in our previous studies. In epochs for normal breathing, we extracted the features for classifying sleep/wakefulness based on time-domain, frequency-domain and non-linear analysis. And then, we conducted the independent two-sample t-test and calculated Mahalanobis distance (MD) between the two categories. As a results, $SD_{LEN}$ (MD = 0.84, p < 0.01), $P_{HF}$ (MD = 0.81, p < 0.01), $SD_{AMP}$ (MD = 0.76, p = 0.031) and $MEAN_{AMP}$ (MD = 0.75, p = 0.027) were selected as optimal feature. We classified sleep/wakefulness based on support vector machine (SVM). The classification results showed mean of sensitivity (Sen.), specificity (Spc.) and accuracy (Acc.) of 60.5%, 89.0% and 84.8% respectively. This method showed the possibilities to automatically classify sleep/wakefulness only using nasal pressure.

• 여성건강간호학회지
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• 제13권3호
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• pp.201-210
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• 2007

Purpose: The purposes of this study were to (a) explore the prevalence of sleep patterns of middle-aged women; (b) identify the relationship between subjective sleep quality and its related variables; and (c) predict the possible explanations of how the related factors affect subjective sleep quality of middle-aged women. Methods: A total of 256 women aged 40-60 years were purposely sampled and given self-administered questionnaires in a cross-sectional, correlation coefficient design. The data was analysed using t-test, one-way ANOVA, Pearson's correlation coefficients, and stepwise multiple regression. Results: The results were as follows; (a) a total of 40% of the women were poor sleepers as defined by a global PSQI score >5; (b) there were significant differences in quality of sleep related to type of family, number of present illnesses, and use of medication; (c) health promoting behaviors, family functioning, depression, and climacteric symptoms were significantly related to subjective sleep quality; and (d) 34% of variance in subjective sleep quality can be explained by climacteric symptoms, depression, type of family, and spouse. Conclusions: Our findings suggested a high proportion of poor sleeping in middle-aged women. Poor sleeping appeared to have poor health promoting behaviors, lower family functioning, worse depression, and higher climacteric symptoms. Climacteric symptoms, depression, type of family, and spouse were independent risk factors for poor sleeping. Nurse professionals should screen for sleep problems in middle-aged women with a biopsychosocial and behavioral aspect.

• 근관절건강학회지
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• 제25권2호
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• pp.104-111
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• 2018

Purpose: The purpose of this study was to investigate the mediating effect of fatigue on the relationship between pain and sleep disturbance in patients with ankylosing spondylitis. Methods: The subjects of this study were 109 patients with ankylosing spondylitis who visited the rheumatology department in a university hospital. Subjects completed structured questionnaires measuring pain, sleep disturbance, and fatigue. Data were analyzed using t-test, Pearson's correlation coefficients, and 3-step regression analysis. Results: Pain was positively correlated with fatigue (r=.60, p<.001) and sleep disturbance (r=.45, p<.001). Fatigue was positively correlated with sleep disturbance (r=.55, p<.001) and had a mediating effect on the relationship between pain and sleep disturbance. Conclusion: The findings confirm that pain in patients with ankylosing spondylitis affects fatigue and its accumulation has a mediating effect on increasing the level of sleep disturbance. In clinical practice, education on symptom management for patients with ankylosing spondylitis needs to be provided for encouraging proper exercise and rest. Patient education should also include strategies to reduce fatigue and promote sleep in daily lives in addition to pain management.

• 한국학교보건학회지
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• 제25권1호
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• pp.51-58
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• 2012

Purpose: This study aims to discover the relation between the sleep duration and quality of adolescents and their body mass index. Methods: The study used data obtained through the 2009 online survey on adolescents health behaviors, targeting a total of 75,066 middle and high school students (39,612 of male students and 35,454 of female students). We first performed t-test, ANOVA and Scheffe's test and then the potential variables which was possibly related to the body mass index are determined from the tests. Using the potential variable, we performed the multiple regression analysis to finally identify the relation between the duration and quality of sleep. Results: As a result, the 39.8% of male students and the 46.5% of female students most frequently respond that the sleep duration was less than 6 hours, and 36.4% of male students and the 45.3% of female students respond that the quality of sleep was not good enough. The body mass index of both the male and the female students portionally decreases to their sleep duration, but the better quality of sleep makes their body mass index higher. Conclusion: In conclusion, the body mass index has some notable relationship with the sleep duration and quality for adolescents. It is advised to consider the sleep duration and quality in the business plans for adolescents in order for the prevention of their body mass index.

• Clinics in Shoulder and Elbow
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• 제26권2호
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• pp.169-174
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• 2023

Background: Sleep quality, quantity, and efficiency have all been demonstrated to be adversely affected by rotator cuff pathology. Previous measures of assessing the impact of rotator cuff pathology on sleep have been largely subjective in nature. This study was undertaken to objectively analyze this relationship through the use of activity monitors. Methods: Patients with full-thickness rotator cuff tears at a single institution were prospectively enrolled between 2018 and 2020. Waist-worn accelerometers were provided for the patients to use each night for 14 days. Sleep efficiency was calculated using the ratio of the time spent sleeping to the total amount of time that was spent in bed. Retraction of the rotator cuff tear was classified using the Patte staging system. Results: This study included 36 patients: 18 with Patte stage 1 disease, 14 with Patte stage 2 disease, and 4 patients with Patte stage 3 disease. During the study, 25 participants wore the monitor on multiple nights, and ultimately their data was used for the analysis. No difference in the median sleep efficiency was appreciated amongst these groups (P>0.1), with each cohort of patients demonstrating a generally high sleep efficiency. Conclusions: The severity of retraction of the rotator cuff tear did not appear to correlate with changes in sleep efficiency for patients (P>0.1). These findings can better inform providers on how to counsel their patients who present with complaints of poor sleep in the setting of full-thickness rotator cuff tears.

• 한국농촌간호학회지
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• 제17권1호
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• pp.1-8
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• 2022

Purpose: This study was to evaluate the effects of a lettuce-based sleep promotion program on sleep, depression, and life satisfaction of the elderly in the community. Methods: Data collection was conducted from April 19 to May 28, 2021, and 49 elderly people with sleep disorders over the age of 60 living in G province. The program consisted of a total of 6 weeks, and evaluated sleep patterns, insomnia severity, depression, and life satisfaction. The collected data were analyzed using the IBM SPSS/WIN 23.0 program descriptive statistics and paired t-test. Results: As a result, the lettuce-based sleep promotion program was found to be effective for total sleep time (t=-2.71, p=.009), deep sleep (t=-3.98, p<.001), insomnia severity (t=10.11, p<.001), depression (t=2.14, p=.038), and life satisfaction (t=-2.15, p=.036). Conclusion: The results of this study suggest that this program should be used as a non-pharmacological intervention to promote sleep of the elderly.

• 동서간호학연구지
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• 제25권1호
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• pp.17-25
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• 2019

Purpose: This study investigated the factors influencing sleep quality in adults according to age groups. The escriptive study was conducted in metropolitan areas of South Korea to control for possible sleep differences between adults living in rural areas and those living in cities. Participants were 450 adults between 19 and 65 years old. Methods: Self-administered questionnaires consisting of including the Korean Modified Sleep Leeds Evaluation Questionnaire, the International Physical Activity Questionnaire and the Perceived Stress Scale were used to assess the quality of adults' sleep. Results: Sleep quality was poor across the all age groups Stress and subjective health status were influencing factors of sleep quality among participants in their 20s; subjective health status and circadian rhythm (evening-type) were influencing factors of those in their 30s; subjective health status, alcohol consumption, and work days of less than 8 hours were influencing factors among participants in their 40s; and stress, circadian rhythm (evening-type), subjective health status, work days of over 11 hours, past smoking habit, and light physical activity were influencing factors of those aged 50 years and over. Conclusion: The quality of sleep was low across the all adult age groups in South Korea. Although the factors influencing quality of sleep differed by age groups, they in general indicate the need to focus on maintaining and controlling health status in sleep interventions.

• Safety and Health at Work
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• 제9권2호
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• pp.236-238
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• 2018

Sleep deprivation may cause accidents, and it has deteriorating effects on health. A measurement of postural steadiness by a portable and affordable Nintendo Wii Fit balance board can be used to quantify a person's alertness. At work, people are under the influence of their environment-often other peopl-dthat may affect their alertness. This work investigates whether sleep deprivation among people is "contagious," as quantified by sway measures. We measured 21 volunteers' postural steadiness while alert and sleep deprived. During the measurements, a screen placed in front of the participants showed a footage of either alert or sleep-deprived faces. We found a significant difference between the day time and night time steadiness, but found no effect resulting from watching footage of sleep-deprived people. This finding shows that a posturographic sleepiness tester quantifies physiological sleep deprivation, and is insensitive to the influence of social factors.

• 지역사회간호학회지
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• 제33권4호
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• pp.396-407
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• 2022

Purpose: The purpose of this study was to assess insomnia and the quality of sleep, investigate the concordance between objective and self-report sleep patterns, and identify physiological, psychological, and situational factors influencing insomnia and sleep quality among firefighters. Methods: A descriptive, cross-sectional study was conducted with 103 firefighters in Korea. The collected data were analyzed using SPSS 23.0. Descriptive statistics, the independent t-test, and hierarchical logistic regression analysis were performed. Results: Insomnia was found in 66 (64.1 %) of the total subjects, and the average quality of sleep (PSQI) was 5.65 (SD=2.57). Total sleep time (401.00 minutes) and sleep latency (21.60 minutes) measured using self-reported scales were longer than the ones measured using objective measurements by approximately 48.70 and 17.10 minutes, respectively. Factors related to insomnia included the role as a paramedic (OR=4.28, 95% CI: 1.02~17.92), anxiety (OR=1.12, 95% CI: 1.01~1.24), and sedentary lifestyle (OR=0.85, 95% CI: 0.78~0.94), and factors related to sleep quality were physical illness status (OR=5.17, 95% CI: 1.53~17.51) and social support (OR=0.86, 95% CI: 0.78~0.95). Conclusion: The results show a high prevalence of insomnia, poor quality of sleep and the discrepancy between objective and subjective sleep patterns among firefighters. To promote sleep quality and health, early screening and treatment of anxiety and physical illness are required. It is necessary to conduct further studies examining the relationship between physical activity level and sleep.

• 한국보건간호학회지
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• 제32권2호
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• pp.263-274
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• 2018

Purpose: This study examined the correlation of insomnia, sleep quality, depression, and circadian rhythm in nursing students. Methods: A total of 213 subjects completed a questionnaire consisting of their general characteristics, Insomnia Severity Index (ISI), Pittsburgh Sleep Quality Index (PSQI), Center for Epidemiologic Studies Depression (CES-D), and Composite Scale of Morningness (CSM). The collected data were analyzed by descriptive statistics, t-test, ANOVA, and Pearson's correlation coefficient using the SPSS 23.0 program. Results: The subjects' mean scores were ISI 7.18; PSQI 11.18; CES-D 16.00; and CSM 30.18. In insomnia, there were significant differences according to caffeine, perceived health status and major satisfaction. In sleep quality, there were significant differences according to perceived health status and major satisfaction. Significant differences in depression were observed according to gender, caffeine, subjective health status, major satisfaction, and circadian rhythm by drinking and exercise. A significant positive correlation was observed among ISI, PSQI, and CES-D. ISI and CES-D were negatively correlated. Conclusion: Tailored health care programs should be developed and applied to prevent and manage sleep-related and emotion-related problems in nursing students by considering the health status, major satisfaction, and gender.