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Kevin G. F. Thomas - One of the best experts on this subject based on the ideXlab platform.

  • Better Sleep in a Strange Bed? Sleep Quality in South African Women with Posttraumatic Stress Disorder.
    Frontiers in psychology, 2017
    Co-Authors: Gosia Lipinska, Kevin G. F. Thomas
    Abstract:

    Although individuals diagnosed with posttraumatic stress disorder (PTSD) regularly report subjective Sleep disruption, many studies using objective measures (e.g., polysomnography) report no PTSD-related Sleep disruption. To account for these inconsistencies, some authors hypothesize that PTSD-diagnosed individuals have Sleep-State Misperception; that is, they self-report experiencing poor Sleep quality, but objectively Sleep relatively normally. We tested this Sleep-State Misperception hypothesis, collecting data on subjectively-reported Sleep quality (in the home, and in the laboratory) and on objectively-measured, laboratory-based, Sleep quality in PTSD-diagnosed participants from low socioeconomic status South African communities. Women with PTSD (n = 21), with trauma exposure but no PTSD (TE; n = 19), and healthy controls (HC; n = 20) completed questionnaires on their average Sleep quality in the past 30 days, and on their Sleep quality after a night (8 hours) of polysomnographic-monitored Sleep in the laboratory. PTSD-diagnosed individuals reported poorer everyday subjective Sleep quality than TE and HC individuals. In the laboratory, however, there were no between-group differences in subjective Sleep quality, and few between-group differences in objective Sleep quality (PTSD-diagnosed individuals only had decreased Sleep depth). Furthermore, whereas measures of laboratory-based objective and subjective Sleep quality correlated significantly, especially in PTSD-diagnosed individuals, there were few significant associations between objective Sleep measures and everyday subjective Sleep quality. Taken together, these findings suggest that PTSD-diagnosed individuals likely experienced better Sleep quality in the laboratory than at home. Descriptive observations corroborated this interpretation, with almost half the sample rating their laboratory Sleep (which they described as “safe” and “quiet”) as better than their home Sleep (which was experienced in an atmosphere marked by high levels of violence and nighttime noise). These findings disconfirm the Sleep-State Misperception hypothesis as related to PTSD, and suggest that the laboratory environment may influence Sleep quality positively in these individuals. Many investigations of Sleep in PTSD do not consider the influence of the laboratory environment. Our findings suggest that future studies in this field should consider that Sleep-State Misperception may be an artefact of the laboratory setting, especially when samples are drawn from communities where violence and crime are an everyday reality.

  • Better Sleep in a Strange Bed? Sleep Quality in South African Women with Posttraumatic Stress Disorder
    Frontiers Media S.A., 2017
    Co-Authors: Gosia Lipinska, Kevin G. F. Thomas
    Abstract:

    Although individuals diagnosed with posttraumatic stress disorder (PTSD) regularly report subjective Sleep disruption, many studies using objective measures (e.g., polysomnography) report no PTSD-related Sleep disruption. To account for these inconsistencies, some authors hypothesize that PTSD-diagnosed individuals have Sleep-State Misperception; that is, they self-report experiencing poor Sleep quality, but objectively Sleep relatively normally. We tested this Sleep-State Misperception hypothesis, collecting data on subjectively-reported Sleep quality (in the home, and in the laboratory) and on objectively-measured, laboratory-based, Sleep quality in PTSD-diagnosed participants from low socioeconomic status South African communities. Women with PTSD (n = 21), with trauma exposure but no PTSD (TE; n = 19), and healthy controls (HC; n = 20) completed questionnaires on their average Sleep quality in the past 30 days, and on their Sleep quality after a night (8 h) of polysomnographic-monitored Sleep in the laboratory. PTSD-diagnosed individuals reported poorer everyday subjective Sleep quality than TE and HC individuals. In the laboratory, however, there were no between-group differences in subjective Sleep quality, and few between-group differences in objective Sleep quality (PTSD-diagnosed individuals only had decreased Sleep depth). Furthermore, whereas measures of laboratory-based objective and subjective Sleep quality correlated significantly, especially in PTSD-diagnosed individuals, there were few significant associations between objective Sleep measures and everyday subjective Sleep quality. Taken together, these findings suggest that PTSD-diagnosed individuals likely experienced better Sleep quality in the laboratory than at home. Descriptive observations corroborated this interpretation, with almost half the sample rating their laboratory Sleep (which they described as “safe” and “quiet”) as better than their home Sleep (which was experienced in an atmosphere marked by high levels of violence and nighttime noise). These findings disconfirm the Sleep-State Misperception hypothesis as related to PTSD, and suggest that the laboratory environment may influence Sleep quality positively in these individuals. Many investigations of Sleep in PTSD do not consider the influence of the laboratory environment. Our findings suggest that future studies in this field should consider that Sleep-State Misperception may be an artifact of the laboratory setting, especially when samples are drawn from communities where violence and crime are an everyday reality

Wallace B. Mendelson - One of the best experts on this subject based on the ideXlab platform.

  • Sleep latency and duration estimates among Sleep disorder patients: variability as a function of Sleep disorder diagnosis, Sleep history, and psychological characteristics.
    Sleep, 2000
    Co-Authors: Peter A. Vanable, James E. Aikens, Lakshminarayana Tadimeti, Brendan Caruana-montaldo, Wallace B. Mendelson
    Abstract:

    Study Objectives: Insomnia patients often report greater Sleep disturbance than found via polysomnography; yet the specific patient factors related to such Sleep time Misperceptions are poorly understood. We sought to characterize the extent to which a diverse group of patients complaining of insomnia (n = 104) misperceive overnight total Sleep time and Sleep latency, and to identify patient factors associated with these variations. Design: Cross-sectional. Setting: University based Sleep disorders center. Patients: Sleep disorder groups consisted of patients with psychophysiological insomnia (n=19), Sleep State Misperception (n=8), insomnia with depressive disorder (n=11), insomnia secondary to Axis I psychiatric disorder other than depression (n=21), periodic limb movement disorder (n=24), and obstructive Sleep apnea (n=21). Measurement and Results: Patients completed a Sleep history questionnaire and the MMPI, underwent overnight diagnostic polysomnographic assessment, and then estimated their total Sleep time and Sleep latency the subsequent morning. On average, patients overestimated Sleep latency, but were equally likely to underestimate vs. overestimate total Sleep time. Sleep time Misperception was associated with longer periods of wakefulness following Sleep onset, greater self-perceived Sleep impairment, as well as several psychological dimensions. Conclusions: Patient factors, including Sleep quality, perceptions of habitual Sleep time, and current psychopathology, potentially

  • Effects of time of night and Sleep stage on perception of Sleep in subjects with Sleep State Misperception
    Psychobiology, 1998
    Co-Authors: Wallace B. Mendelson
    Abstract:

    Although previous studies have documented that some persons who complain of poor Sleep report having been awake when questioned following an awakening from Stage 2 Sleep induced by an auditory stimulus, such observations have been confined to the first NREM-REM cycle. We have examined the possibility that the perception of having been awake or aSleep may differ across the night. Eight subjects with Sleep State Misperception were awakened by a 500-Hz tone of progressive amplitude at five time points and were then asked to report whether they believed themselves to have been awake or aSleep. This procedure was carried out on an early night during the first Sleep cycle, and on a late night during the third Sleep cycle, in random sequence. During the early Stage 2 trial, subjects were more likely to report having been awake, whereas in the late Stage 2 trial, they were more likely to report that they had been aSleep. Conversely, in the REM Sleep trial on the early night, subjects were more likely to report that they had been aSleep. On the late night they were more likely to report that they had been awake, a change which was paralleled by a significant drop in scores on the Foulkes Dream Complexity Scale. Calculation of the duration of uninterrupted Sleep prior to the trials suggests that this may have been a factor in the Stage 2, but not the REM, findings. There were no significant differences between the early and late REM trials in the frequency of dream reports, quality of dreams, or fragmentation of REM. These data indicate that subjects with Sleep State Misperception may experience REM Sleep very differently in the first and third NREM-REM cycles.

  • Long-term follow-up of chronic insomnia.
    Sleep, 1995
    Co-Authors: Wallace B. Mendelson
    Abstract:

    In order to assess the long-term outcome of Sleep disturbance, 28 well-characterized patients with psychophysiological insomnia or Sleep State Misperception were given structured interviews 40 months and 64 months after initial assessment. Most patients still reported Sleep disturbance, albeit with some improvement. The number of nights per week of disturbed Sleep decreased, subjective total Sleep time increased, daytime Sleepiness declined, there was an increase in feeling refreshed in the morning and there was a trend toward decreased global complaints of poor Sleep. Subjective Sleep latency was unchanged, and the only parameter that worsened was difficulty falling aSleep. Only a minority of the patients (18%) were taking prescription hypnotics at follow-up, but these patients believed that they were of benefit. There was a significant rate of increase in the use of over-the-counter hypnotics at the time of the second follow-up, although there was a low rate of satisfaction associated with them.

Gosia Lipinska - One of the best experts on this subject based on the ideXlab platform.

  • Better Sleep in a Strange Bed? Sleep Quality in South African Women with Posttraumatic Stress Disorder.
    Frontiers in psychology, 2017
    Co-Authors: Gosia Lipinska, Kevin G. F. Thomas
    Abstract:

    Although individuals diagnosed with posttraumatic stress disorder (PTSD) regularly report subjective Sleep disruption, many studies using objective measures (e.g., polysomnography) report no PTSD-related Sleep disruption. To account for these inconsistencies, some authors hypothesize that PTSD-diagnosed individuals have Sleep-State Misperception; that is, they self-report experiencing poor Sleep quality, but objectively Sleep relatively normally. We tested this Sleep-State Misperception hypothesis, collecting data on subjectively-reported Sleep quality (in the home, and in the laboratory) and on objectively-measured, laboratory-based, Sleep quality in PTSD-diagnosed participants from low socioeconomic status South African communities. Women with PTSD (n = 21), with trauma exposure but no PTSD (TE; n = 19), and healthy controls (HC; n = 20) completed questionnaires on their average Sleep quality in the past 30 days, and on their Sleep quality after a night (8 hours) of polysomnographic-monitored Sleep in the laboratory. PTSD-diagnosed individuals reported poorer everyday subjective Sleep quality than TE and HC individuals. In the laboratory, however, there were no between-group differences in subjective Sleep quality, and few between-group differences in objective Sleep quality (PTSD-diagnosed individuals only had decreased Sleep depth). Furthermore, whereas measures of laboratory-based objective and subjective Sleep quality correlated significantly, especially in PTSD-diagnosed individuals, there were few significant associations between objective Sleep measures and everyday subjective Sleep quality. Taken together, these findings suggest that PTSD-diagnosed individuals likely experienced better Sleep quality in the laboratory than at home. Descriptive observations corroborated this interpretation, with almost half the sample rating their laboratory Sleep (which they described as “safe” and “quiet”) as better than their home Sleep (which was experienced in an atmosphere marked by high levels of violence and nighttime noise). These findings disconfirm the Sleep-State Misperception hypothesis as related to PTSD, and suggest that the laboratory environment may influence Sleep quality positively in these individuals. Many investigations of Sleep in PTSD do not consider the influence of the laboratory environment. Our findings suggest that future studies in this field should consider that Sleep-State Misperception may be an artefact of the laboratory setting, especially when samples are drawn from communities where violence and crime are an everyday reality.

  • Better Sleep in a Strange Bed? Sleep Quality in South African Women with Posttraumatic Stress Disorder
    Frontiers Media S.A., 2017
    Co-Authors: Gosia Lipinska, Kevin G. F. Thomas
    Abstract:

    Although individuals diagnosed with posttraumatic stress disorder (PTSD) regularly report subjective Sleep disruption, many studies using objective measures (e.g., polysomnography) report no PTSD-related Sleep disruption. To account for these inconsistencies, some authors hypothesize that PTSD-diagnosed individuals have Sleep-State Misperception; that is, they self-report experiencing poor Sleep quality, but objectively Sleep relatively normally. We tested this Sleep-State Misperception hypothesis, collecting data on subjectively-reported Sleep quality (in the home, and in the laboratory) and on objectively-measured, laboratory-based, Sleep quality in PTSD-diagnosed participants from low socioeconomic status South African communities. Women with PTSD (n = 21), with trauma exposure but no PTSD (TE; n = 19), and healthy controls (HC; n = 20) completed questionnaires on their average Sleep quality in the past 30 days, and on their Sleep quality after a night (8 h) of polysomnographic-monitored Sleep in the laboratory. PTSD-diagnosed individuals reported poorer everyday subjective Sleep quality than TE and HC individuals. In the laboratory, however, there were no between-group differences in subjective Sleep quality, and few between-group differences in objective Sleep quality (PTSD-diagnosed individuals only had decreased Sleep depth). Furthermore, whereas measures of laboratory-based objective and subjective Sleep quality correlated significantly, especially in PTSD-diagnosed individuals, there were few significant associations between objective Sleep measures and everyday subjective Sleep quality. Taken together, these findings suggest that PTSD-diagnosed individuals likely experienced better Sleep quality in the laboratory than at home. Descriptive observations corroborated this interpretation, with almost half the sample rating their laboratory Sleep (which they described as “safe” and “quiet”) as better than their home Sleep (which was experienced in an atmosphere marked by high levels of violence and nighttime noise). These findings disconfirm the Sleep-State Misperception hypothesis as related to PTSD, and suggest that the laboratory environment may influence Sleep quality positively in these individuals. Many investigations of Sleep in PTSD do not consider the influence of the laboratory environment. Our findings suggest that future studies in this field should consider that Sleep-State Misperception may be an artifact of the laboratory setting, especially when samples are drawn from communities where violence and crime are an everyday reality

Amy L. Yeager - One of the best experts on this subject based on the ideXlab platform.

  • Subtyping DSM-III-R primary insomnia: a literature review by the DSM-IV Work Group on Sleep Disorders.
    The American journal of psychiatry, 1991
    Co-Authors: Charles F. Reynolds, David J. Kupfer, Daniel J. Buysse, Patricia A. Coble, Amy L. Yeager
    Abstract:

    OBJECTIVE The authors review the usefulness, reliability, and validity of recently proposed subtypes of primary insomnia. DSM-III uses "primary insomnia" to indicate chronic insomnia not associated with other diagnosable mental or medical disorders, whereas the International Classification of Sleep Disorders (ICSD) recognizes three subtypes: psychophysiological insomnia, idiopathic insomnia, and Sleep State Misperception. METHOD After reviewing all of the primary source references for each insomnia disorder in the ICSD and all of the additional primary sources cited in each of these, the authors conducted an automated literature search using Medline. Of the 48 primary sources located, the authors selected 27 studies that were reported in peer-reviewed journals, had the largest available subject groups, used diagnostic reliability procedures, and included control groups. RESULTS The studies reviewed contained limited empirical support for the proposed distinction between idiopathic and psychophysiological insomnia. Sleep State Misperception appears, however, to be a highly prevalent feature of chronic insomnia generally, rather than only a specific disorder per se. CONCLUSIONS The authors conclude that there is not yet sufficient empirical evidence to warrant the abandonment of DSM-III-R "primary insomnia" and the adoption of the ICSD subtypes in DSM-IV. However, they affirm the heuristic value of the ICSD subtypes and the need for field trials to compare the performance characteristics of the DSM-III-R and ICSD systems with respect to 1) interrater reliability, 2) effects of rater expertise (generalist versus specialist) on rates of agreement, and 3) effects of polysomnographic data on rates of agreement.

Yu Zhu - One of the best experts on this subject based on the ideXlab platform.

  • Sleep State Misperception in schizophrenia: Are negative symptoms at work?
    Comprehensive psychiatry, 2016
    Co-Authors: Yun Bian, Zhi Xiong Wang, Xiao Le Han, Li Chen, Yu Zhu
    Abstract:

    Abstract Objective This study investigates subjective and objective Sleep quality to ascertain whether there is a Sleep State Misperception in schizophrenia patients, as well as analyze potential effect factors. Methods A total of 148 inpatients with schizophrenia admitted to Beijing HuiLongGuan Hospital were enrolled in this study. The quality of objective Sleep was assessed by polysomnography (PSG). On the second day after the successful completion of the PSG evaluation, an interview was arranged to collect patients' recorded subjective evaluation on Sleep time, Sleep latency, and wake times. Demographic information was collected from an interview, medical records were reviewed, and psychiatric symptoms were assessed using the Positive And Negative Symptom Scale (PANSS). Results The main finding of this study was that schizophrenic patients exhibited Sleep State Misperception with a pattern of overestimation of total Sleep time (TST) as well as Sleep efficiency (SE), and an underestimation of Sleep onset latency (SOL). Regarding the ± standard deviation of the differences between subjective and objective TST as a clinical acceptable range, the patients were divided into three groups: the overestimate group, the normal group, and the underestimate group. The differences of total PANSS score, especially the PANSS-N score in the overestimate group, the normal group and the underestimate group were significant, and there were significant differences between the overestimate group and the other groups. Conclusion A comprehensive evaluation of the subjective and objective Sleep quality in patients with schizophrenia is needed, especially when negative symptoms are severe.

  • Sleep State Misperception in schizophrenia: Are negative symptoms at work?
    COMPREHENSIVE PSYCHIATRY, 2016
    Co-Authors: Bian Yun, Li Chen, Yu Zhu, Wang, Zhi Xiong, Xiao Le Han, Wu, Cheng Jing
    Abstract:

    Objective: This study investigates subjective and objective Sleep quality to ascertain whether there is a Sleep State Misperception in schizophrenia patients, as well as analyze potential effect factors. Methods: A total of 148 inpatients with schizophrenia admitted to Beijing HuiLongGuan Hospital were enrolled in this study. The quality of objective Sleep was assessed by polysomnography (PSG). On the second day after the successful completion of the PSG evaluation, an interview was arranged to collect patients' recorded subjective evaluation on Sleep time, Sleep latency, and wake times. Demographic information was collected from an interview, medical records were reviewed, and psychiatric symptoms were assessed using the Positive And Negative Symptom Scale (PANSS). Results: The main finding of this study was that schizophrenic patients exhibited Sleep State Misperception with a pattern of overestimation of total Sleep time (TST) as well as Sleep efficiency (SE), and an underestimation of Sleep onset latency (SOL). Regarding the standard deviation of the differences between subjective and objective TST as a clinical acceptable range, the patients were divided into three groups: the overestimate group, the normal group, and the underestimate group. The differences of total PANSS score, especially the PANSS-N score in the overestimate group, the normal group and the underestimate group were significant, and there were significant differences between the overestimate group and the other groups. Conclusion: A comprehensive evaluation of the subjective and objective Sleep quality in patients with schizophrenia is needed, especially when negative symptoms are severe. (C) 2016 Elsevier Inc. All rights reserved.Beijing Natural Science Foundation [7154208]SCI(E)PubMedSSCIARTICLEazxsdcvf123@126.com33-386