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At least 19 recordsLinked to original sources
PubMed2005

Sensitivity and specificity of measures of the insomnia experience: a comparative study of psychophysiologic insomnia, insomnia associated with mental disorder and good sleepers.

STUDY OBJECTIVES: To explore proposed explanatory mechanisms in psychophysiologic insomnia by investigating the sensitivity and specificity of commonly used insomnia research tools in discriminating psychophysiologic insomnia, insomnia associated with mental disorder, and good sleepers. DESIGN: Cross-sectional, between-group comparison of responses from subjects with psychophysiologic insomnia, those with insomnia associated with mental disorder, and good sleepers to psychometrically robust self-report instruments. SETTING: Attendees at adult community outpatient clinics. PARTICIPANTS: Fifty-four adults (36 women, 18 men; average age 40 years) across 3 groups (n = 18 per group). Participants with psychophysiologic insomnia met combined Inteernational Classification of Sleep Disorders, Revised and Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition criteria and had no history of mental disorder. Participants with insomnia associated with mental disorder satisfied the same criteria for sleep disturbance and met Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (Structured Clinical Interview for DSM-IV axis-I Disorders) criteria for depressive disorder. The majority had comorbid anxiety disorder. Insomnia duration in the groups with psychophysiologic insomnia and insomnia associated with mental disorder was around 10 years. Good sleepers served as a control group and included self-reported good sleepers with no history of sleep problems or psychiatric disorder. INTERVENTION: N/A. MEASUREMENTS AND RESULTS: Analyses of variance, adjusted for multiple comparisons, indicated no between-group differences on a measure of sleep-related stimulus control, and self-reported somatic arousal was higher in subjects with insomnia associated with mental disorder than in good sleepers or those with psychophysiologic insomnia. Subjects with insomnia associated with mental disorder and psychophysiologic insomnia had poorer sleep hygiene and were characterized by heightened mental arousal. Logistic regression indicated that "effortful preoccupation with sleep" discriminated subjects with both psychophysiologic insomnia (100% sensitivity, 94% specificity) and insomnia associated with mental disorder (100%, 100%) from good sleepers and that only depressive symptomatology discriminated insomnia associated with mental disorder from psychophysiologic insomnia. CONCLUSION: Psychophysiologic insomnia and insomnia associated with mental disorder may be on a continuum of insomnia severity, rather than categorically distinct. Insomnia associated with mental disorder may respond to psychological intervention. Factors specifically discriminating insomniacs from good sleepers require further investigation.

Adult↗
PubMed1994

Sleep onset insomnia, sleep maintaining insomnia and insomnia with early morning awakening--temporal stability of subtypes in a longitudinal study on general practice attenders.

The present study investigated the temporal stability of insomnia patterns during a 4-month study period, classifying insomnia as sleep-onset insomnia, sleep-maintaining insomnia or insomnia with early morning awakening. In a longitudinal study design, 2,512 general practice attenders were investigated at the time of the first inquiry (T1) with a questionnaire. Four months later (T2), all patients complaining of difficulties in initiating and/or maintaining sleep and/or early morning awakening (n = 328) were again contacted by mail and received the same questionnaire as at T1. According to the reported symptoms, patients were assigned to the different subtypes of insomnia. The diagnosis at T1 was then compared with the diagnosis at T2 4 months later. Only about half of all patients who complained of difficulties in initiating sleep at T1 still exclusively reported sleep-onset insomnia 4 months later, whereas the remaining patients were distributed to different subtypes. The stability of sleep-maintaining insomnia and insomnia with early morning awakening was even lower. Comorbidity with a somatic or psychiatric disorder at T1 and change in hypnotic treatment did not account for the instability of the respective subgroup of insomnia. These findings illustrate that cross-sectional studies focusing on subtypes of insomnia, e.g. sleep-onset insomnia, may lead to erroneous results.

Adolescent↗
PubMed1997

Clinical factors contributing to the differential diagnosis of primary insomnia and insomnia related to mental disorders.

OBJECTIVE: Primary insomnia and insomnia related to mental disorders are the two most common DSM-IV insomnia diagnoses, but distinguishing between them is difficult in clinical practice. This analysis was performed to identify clinical factors used by sleep specialists to distinguish primary insomnia from insomnia related to mental disorders. METHOD: Clinicians evaluated 216 patients referred for insomnia at five clinical sites, rated a list of clinical factors judged to contribute to each patient's presentation, and assigned diagnoses. Analysis of variance was performed, with contributing factors as the dependent variable and diagnostic group and clinic location as independent variables. RESULTS: Sleep specialists rated a psychiatric disorder as a stronger factor for insomnia related to mental disorders and rated negative conditioning and sleep hygiene as stronger factors for primary insomnia. However, a psychiatric disorder was rated as a contributing factor for 77% of patients who received a first diagnosis of primary insomnia. CONCLUSIONS: While neither sleep hygiene nor negative conditioning is a diagnostic criterion in DSM-IV, these results support the face validity of these clinical factors distinguishing between primary insomnia and insomnia related to mental disorders. The use of a psychiatric disorder as an inclusion criterion for insomnia related to mental disorders and an exclusion criterion for primary insomnia reinforces a categorical distinction between the two diagnoses, but the contribution of psychiatric symptoms in primary insomnia appears to be a clinically relevant one. These findings suggest the need for studies on the validity of negative conditioning and sleep hygiene in the etiology of primary insomnia, as well as on the significance of psychiatric disorders, especially depression, in primary insomnia.

Adolescent↗
PubMed1989

The Zurich study. VIII. Insomnia: association with depression, anxiety, somatic syndromes, and course of insomnia.

The association of three subtypes of insomnia with psychic and functional syndromes, and the course of insomnia over 7 years were examined in a Swiss cohort of young adults interviewed three times. Specific associations were found between repeated brief insomnia (RBI) and recurrent brief depression (RBD). Continued insomnia (CI) was associated with major depression. All three subtypes of insomnia were associated with anxiety disorders; 52% of insomniacs were free of concurrent anxiety and depression. Insomnia--especially RBI and CI--was also associated with a number of functional complaints, but not with the consumption of alcohol, medicine, or illegal drugs. Insomniacs with RBI and occasional insomnia (OI) experienced more life events and interpersonal conflicts than controls. These findings support the subdivision of insomnia into different subtypes. The longitudinal analysis showed that insomnia tends to reoccur. For subjects with insomnia either at age 21 or 23 years, there was a higher risk of further insomnia at follow-ups. The specific subtype of insomnia at the first occurrence was not predictive for the outcome: all subtypes of insomnia enhance the risk of relapses in a similar way. Insomnia at age 21 is no precursor of the first onset of a depressive or anxiety disorder within a 2-year follow-up. With respect to the course of insomnia over 7 years, the subtypes did not differentiate.

Adult↗
PubMed2004

Insomnia and generalized anxiety disorder: effects of cognitive behavior therapy for gad on insomnia symptoms.

Although clinical practice suggests that sleep complaints are frequent among patients with generalized anxiety disorder (GAD), frequency, severity, types of insomnia complaints, and relationship to GAD diagnosis severity in patients diagnosed using Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) criteria are not well documented. Clinical data about the impact on insomnia symptoms of treating GAD worries are also lacking. The present study examined these aspects in 44 GAD patients who participated in a treatment study specifically addressing excessive worries through CBT interventions. All patients were assessed using a structured clinical interview and the Anxiety Disorder Interview Schedule-IV (ADIS-IV). They also completed anxiety and insomnia inventories, including the Insomnia Severity Index (ISI), a self-report measure which assesses insomnia type, severity and interference with daily life. Among this sample, 47.7% reported difficulties initiating sleep, 63.6% reported difficulties maintaining sleep, and 56.8% complained of waking too early in the morning. The majority of these patients (86.5%) reported never having experienced insomnia without having excessive worries. However, insomnia severity and GAD severity were not correlated. In this sample, patients with severe GAD did not necessarily report more severe insomnia symptoms. Regarding treatment impact on insomnia complaints, ISI post-treatment scores were significantly lower after treatment. Mean post-treatment scores almost reached ISI's "absence of clinical insomnia" category. Results indicate that this CBT package for GAD does have a significant impact on sleep quality even if sleep disturbances were not specifically addressed during treatment.

Adult↗
PubMedDate not supplied

Prevalence of DSM-IV diagnostic criteria of insomnia: distinguishing insomnia related to mental disorders from sleep disorders.

Epidemiological studies of insomnia in the general population have reported high prevalence rates. However, few have applied diagnostic criteria from existing classification systems. Consequently. It is not possible to determine whether subjects suffered from a sleep disorder or whether the insomnia constituted a symptom of a mental disorder. Insomnia and its relationship with other mental disorders was investigated in the general population using DSM-IV criteria. A representative sample of 5622 subjects from the French population were interviewed about their sleep habits over the telephone by lay interviewers. The course and content of interviews were customized by means of the Sleep-Eval knowledge-based system. A total of 18.6% of the sample reported insomnia complaints. The presence of insomnia complaints, lasting for at least one month with daytime repercussions was found for 12.7% of the sample. Subsequently, subjects were classified according to the Sleep Disorder decision-making process proposed by the DSM-IV classification, but without the recourse of polysomnographic recordings. Specific sleep disorder diagnoses were given for 5.6% of the sample, mostly as insomnia related to another mental disorder, primary insomnia was given for 1.3% of the sample. Primary mental disorder diagnoses were supplied for 8.4% of the sample, mostly as generalized anxiety disorder. The results of this investigation emphasize the need to use classifications to determine whether subjects with insomnia complaints suffer from a sleep disorder or whether insomnia constitutes a symptom of some other mental disorder. These distinctions are of utmost importance as they have a bearing on the choice of treatment. Conversely, diagnoses were obtained by lay interviews, which may have caused a lack of recognition and/or discrimination for light or borderline symptomatology.

Adolescent↗
PubMed2001

Validation of the Insomnia Severity Index as an outcome measure for insomnia research.

Background: Insomnia is a prevalent health complaint that is often difficult to evaluate reliably. There is an important need for brief and valid assessment tools to assist practitioners in the clinical evaluation of insomnia complaints.Objective: This paper reports on the clinical validation of the Insomnia Severity Index (ISI) as a brief screening measure of insomnia and as an outcome measure in treatment research. The psychometric properties (internal consistency, concurrent validity, factor structure) of the ISI were evaluated in two samples of insomnia patients.Methods: The first study examined the internal consistency and concurrent validity of the ISI in 145 patients evaluated for insomnia at a sleep disorders clinic. Data from the ISI were compared to those of a sleep diary measure. In the second study, the concurrent validity of the ISI was evaluated in a sample of 78 older patients who participated in a randomized-controlled trial of behavioral and pharmacological therapies for insomnia. Change scores on the ISI over time were compared with those obtained from sleep diaries and polysomnography. Comparisons were also made between ISI scores obtained from patients, significant others, and clinicians.Results: The results of Study 1 showed that the ISI has adequate internal consistency and is a reliable self-report measure to evaluate perceived sleep difficulties. The results from Study 2 also indicated that the ISI is a valid and sensitive measure to detect changes in perceived sleep difficulties with treatment. In addition, there is a close convergence between scores obtained from the ISI patient's version and those from the clinician's and significant other's versions.Conclusions: The present findings indicate that the ISI is a reliable and valid instrument to quantify perceived insomnia severity. The ISI is likely to be a clinically useful tool as a screening device or as an outcome measure in insomnia treatment research.

Journal Article↗
PubMed1992

Long-term study of the sleep of insomnia patients with sleep state misperception and other insomnia patients.

OBJECTIVE: The objectives were 1) to investigate differences among patients with subjective insomnia (sleep state misperception), patients with objective findings of insomnia, and normal volunteers and 2) to assess the consistency of the sleep findings during a 2-month period. METHOD: Twenty-one subjects were studied. Subjects with sleep state misperception (N = 7) had insomnia complaints for more than 1 year, no objective sleep disturbance, and sleep efficiency of 90% or greater (on the diagnostic screening sleep recording), while subjectively estimating that sleep time was less than 6.5 hours. Subjects with objective insomnia (N = 7) met the same subjective criteria, but objectively sleep efficiency was 85% or less. Normal subjects (N = 7) had no insomnia complaints and objective sleep efficiency of 90% or greater. All subjects were recorded on 2 consecutive nights three times with a 3-week period between each pair of nights (6 standard all-night polysomnographic sessions of 8 hours). A subjective sleep questionnaire was administered after each sleep recording night. RESULTS: Sleep stage variables (percentages) were similar between the two insomnia groups, and both were different from the normal subjects. Sleep continuity variables were disturbed in the objective insomnia group, but they were similar in the sleep state misperception and normal groups. Both insomnia groups rated their sleep as inadequate on the questionnaires and differed from the normal subjects. The distinct sleep patterns of each of the three groups did not vary over the 6 nights of assessment. CONCLUSIONS: Sleep state misperception may be a prodromic or transitional state of sleep dysfunction between normal sleep and the sleep pattern of objective insomnia.

Adult↗
PubMed2001

Insomnia and alpha sleep in chronic non-organic pain as compared to primary insomnia.

A considerable proportion of chronic non-organic pain patients suffer from insomnia, and alpha sleep has been suggested to be specifically associated with fibromyalgia. However, the clinical significance of those symptoms is not clear. This study was carried out to investigate this question. Twenty-six middle-aged, non-organic pain patients complaining of persistent insomnia were compared with 25 chronic primary insomniacs in a polysomnographic investigation. Alpha sleep was measured by automatic EEG analysis. A postsleep inventory allowed a separation of those pain patients with actual pain in the recording night to examine its possible influence on sleep. Both groups of patients displayed severe disturbance of sleep maintenance. The pain group did not differ in any of the insomnia variables or in sleep stages from chronic primary insomniacs. The occurrence of alpha sleep was high in either group which suggests that this is not a phenomenon specifically related to pain syndromes. A comparison of the pain subgroups revealed no difference between those with or without actual pain in the recording night. It is concluded that insomnia in chronic pain is of the same type and degree as primary insomnia. Apparently, the chronic process made insomnia so persistent that there was no response to actual night-time pain. Our study suggests that the interpretation of insomnia as secondary to pain, as it is usually made by the pain patients themselves, is a misattribution. It is suggested that insomnia in chronic pain patients should be taken seriously and treated by its specific methods.

Adult↗
PubMed1998

The prevalence and pattern of insomnia in Japanese industrial workers: relationship between psychosocial stress and type of insomnia.

We examined the prevalence of insomnia among Japanese male industrial workers and analyzed the effect of psychosocial stress on the prevalence of three types of insomnia: 'difficulty in falling asleep', 'frequent sleep interruption' and 'early morning arousal'. The study population consisted of male day workers (n = 319) in a manufacturing heavy industry company located in Nagasaki City, Japan. The subjects answered a questionnaire consisting of six sleep-related items and 24 questions related to occupational and private life conditions. A total of 271 men (average age 40.9 years) completed the questionnaire; a response rate of 85%. Insomnia within the month preceding the survey was present in 27.7% of the workers (75/271). Multiple logistic regression analysis demonstrated that different psychosocial stressors were associated with different types of insomnia. Visual display terminal (VDT) work overload was significantly associated with all types of insomnia, while 'over-involvement in the job' was associated with difficulty in falling asleep and early morning arousal. Our results demonstrated that the prevalence of insomnia in Japanese workers is similar to that reported among European and American general adult population. Our results also indicate that the use of VDT in the workfield is associated with insomnia.

Adolescent↗
PubMed1998

The consequences of a week of insomnia. II: Patients with insomnia.

Insomnia patients present with a consistent set of complaints that they generally report as secondary to their poor sleep, including increased tension/confusion, decreased vigor, personality disturbance, subjective overestimation of poor sleep, increased body temperature, increased 24-hour whole-body metabolic rate, and longer MSLT latencies. If there is a relationship between the poor sleep and the secondary symptoms, then particularly poor sleep should exacerbate those symptoms. Ten patients with insomnia were identified on the basis of a 2-night screening protocol, then slept in the laboratory for 10 additional nights. On 7 of the nights, the insomnia patients had their wake-after-sleep-onset increased so that their total sleep time was 80% of that on their second screening night, resulting in an average of 254 minutes (of 480 minutes in bed) of sleep. The spectrum of changes seen in these patients with insomnia who had very poor sleep for a week was characteristic of mild partial sleep deprivation, and not consistent with exacerbation of symptoms found in patients with primary insomnia. Specifically, (1) these patients had a reduction as opposed to an increase in the MSLT values, but the MSLT values at the end of the week remained within normal limits; (2) these patients had decreased (as opposed to increased) whole metabolic rate following nights of particularly poor sleep; (3) these patients tended to underestimate (rather than overestimate) their subjective sleep latency while being given particularly poor sleep; and (4) these patients displayed no significant change in body temperature, subjective anxiety, or MMPI scores following particularly poor sleep. It was concluded that the secondary symptoms reported by patients with primary insomnia are probably not related to their poor sleep per se. Data from previous studies that varied physiological arousal were used to support the contention that the secondary symptoms of patients with insomnia, and perhaps the poor sleep itself, occur secondary to central nervous system hyperarousal.

Adult↗
PubMed2002

Chronic insomnia, premenopausal women and sleep disordered breathing: part 2. Comparison of nondrug treatment trials in normal breathing and UARS post menopausal women complaining of chronic insomnia.

OBJECTIVE: The question addressed here is: Can a discrete sleep disordered breathing (SDB) play a role in the insomnia complaint of postmenopausal chronic insomniacs? To respond to the query, two groups of individuals derived from a cohort of postmenopausal chronic insomniacs recruited mostly from the community were enlisted in a treatment protocol. These subjects were all individuals identified with normal breathing (n=68) and all those recognized with Upper Airway Resistance Syndrome (UARS) (n=62) pooled from a cohort of 349 postmenopausal insomniacs. TREATMENT PROTOCOL: The 62 UARS were allocated to either treatment of chronic insomnia by behavioral approaches or treatment of SDB. Based on ENT evaluation, health professionals in charge of patients selected either treatment with nasal CPAP or treatment of nasal turbinates. A stratification correction was performed to obtain a near equal number of both treatment modalities in each of the two subgroups. The 68 individuals with normal breathing were randomly allocated to immediate behavioral treatment of insomnia or delay treatment of insomnia. The delay treatment received a list of 10 sleep hygiene recommendations by mail. METHODOLOGY: Questionnaires, visual analog scales (VAS), Epworth Sleepiness Scale (ESS), clinical interviews, clinical evaluation with oto-laryngologic clinical assessment of a presence/absence of narrow upper airway and location of narrowing. Actigraphy and polysomnography (PSG) with pressure transducer/and nasal cannula system and esophageal manometry. DATA ANALYSES: All recording data were scored blind to patient's condition. RESULTS: Two subjects in the SBD-CPAP treated group (Group B) and two subjects in the delayed treatment group (Group D) dropped out. Total sleep time was improved compared to baseline in all groups, including the delayed treatment group. One group was significantly better (ANOVA, P=.05) with a more important delta score compared to baseline, and this was the behaviorally treated non-SDB. Sleep latency was significantly decreased in the behaviorally treated group (with or without SBD), P=.05, compared to SBD-treated and delayed treatment groups. Sleep latency was, however, improved in all groups. VAS for "quality of sleep" was higher at 6 months in all the groups when compared to "baseline" values. VAS for "daytime fatigue" showed significant differences among the four groups (ANOVA, P=.01); the overall score at the end of treatment was significantly better in the SDB-treated group than the other three groups. SBD was treated either by radio frequency on nasal turbinate or by nasal CPAP. CPAP-treated patients had a lower VAS score than nasal turbinate treatment, but the difference was only a trend. The delta improvement (6-month baseline condition) in "daytime fatigue" of each subgroup was calculated and compared within and between groups. Despite the small number of subjects, the turbinate-treated subgroup was significantly different from Groups B, C and D (ANOVA, P=.05). When a similar comparison was made with the nasal CPAP group, there was only a nonsignificant trend when compared to Groups B, C and D. CONCLUSION: Abnormal breathing during sleep significantly enhanced complaints of daytime fatigue in postmenopausal chronic insomniacs and this complaint improved with SDB treatment. This improvement is significantly better compared to SDB insomniacs treated with a behavioral regimen. Behavioral treatment, however, gave the best response in the non-SDB chronic insomnia group and improved better long sleep latency even in the SDB group. These results suggest the need to find an appropriate treatment for SBD even if mild and to recognize the role of SDB in relation to symptoms seen with chronic insomnia.

Aged↗
PubMed2003

Population study on the prevalence of insomnia and insomnia-related factors among Japanese women.

BACKGROUND: To identify the effect of certain factors on insomnia in the general population. METHODS: A self-reported questionnaire survey was conducted among 648 Japanese women living in the residential area of a city. Age of participants ranged from 20 to 80 s. RESULTS: The crude prevalence of insomnia was 8.8%. Multivariate logistic regression analysis with control for many confounding variables revealed that experiencing a major life event (OR=4.4, 95% CI=1.7-11.4, P<0.01), depressive state (OR=1.2, 95% CI=1.1-1.3, P<0.01), and 'relatively poor or poor' self-rated health (OR=3.2, 95% CI=1.0-10.1, P<0.05) were risk factors for insomnia. By contrast, there was no dose-response relationship between the distance of our subjects from a major road and prevalence of insomnia. CONCLUSIONS: The authors assume that depressive state by a major life event is closely associated with insomnia and that relatively poor self-rated health is also associated with stressful event and psychological distress. Although the noise from vehicles such as cars or motorcycles can affect the quality of sleep for subjects who live near a major road, in general the prevalence of insomnia did not increase significantly in this study.

Adult↗
PubMed1992

Risk factors associated with complaints of insomnia in a general adult population. Influence of previous complaints of insomnia.

BACKGROUND: Insomnia is a common complaint both in the general population and also in physician's offices. However, risk factors for the development of insomnia complaints have not been completely identified. METHODS: To identify population characteristics associated with increased prevalence of insomnia complaints, we surveyed a large general adult population in 1984 through 1985. We evaluated the relationship among current complaints of initiating and maintaining sleep and obesity, snoring, concomitant health problems, socioeconomic status, and documented complaints of difficulty with insomnia 10 to 12 years previously. RESULTS: The strongest risk factor for complaints of initiating and maintaining sleep was previous complaints of insomnia (odds ratio, 3.5). In addition, female gender (odds ratio, 1.5), advancing age (odds ratio, 1.3), snoring (odds ratio, 1.3), and multiple types of concomitant health problems (odds ratios, 1.1 to 1.7) were all risk factors associated with an increased rate of complaints of initiating and maintaining sleep. CONCLUSION: Complaints of insomnia tend to be a persistent or recurrent problem over long periods of time. Female gender, advancing age, and concomitant health problems also are important risk factors.

Adult↗
PubMed1992

Rebound insomnia in normals and patients with insomnia after abrupt and tapered discontinuation.

Rebound insomnia was studied in subjects, aged 25-50 years, with insomnia complaints and normal sleep, insomnia complaints and disturbed sleep, and normal sleep with no complaints (N = 21, n = 7 per group). Standard sleep recordings were collected on a baseline night and after abrupt discontinuation of 6 nights of 0.50 mg triazolam, tapered discontinuation (3 nights of 0.50 mg, 2 nights of 0.25 mg, and 1 night of 0.125 mg triazolam) and 6 nights of placebo. Significantly disturbed sleep on the discontinuation night compared to the baseline night was found. The relative degree of rebound insomnia was greater in the abrupt condition than in either the tapered or placebo conditions. The tapered condition reduced sleep time by half that of the abrupt condition which was twice the reduction found in the placebo condition. An overall (regardless of group or condition) difference in baseline versus discontinuation sleep was found, suggesting that pill discontinuation itself leads to sleep disturbance. Subjects did not differ in rebound insomnia as a function of pre-existing sleep disturbance.

Adult↗
PubMed1999

Insomnia: assessment and management in primary care. National Heart, Lung, and Blood Institute Working Group on Insomnia.

Patients with insomnia may experience one or more of the following problems: difficulty falling asleep, difficulty maintaining sleep, waking up too early in the morning and nonrefreshing sleep. In addition, daytime consequences such as fatigue, lack of energy, difficulty concentrating and irritability are often present. Approximately 10 percent of adults experience persistent insomnia, although most patients do not mention it during routine office visits. Asking sleep-related questions during the general review of systems and asking patients with sleep complaints to keep a sleep diary are helpful approaches in detecting insomnia. Behavior and pharmacologic therapies are used in treating insomnia. Behavior approaches take a few weeks to improve sleep but continue to provide relief even after training sessions have ended. Hypnotic medications are safe and effective in inducing, maintaining and consolidating sleep. Effective treatment of insomnia may improve the quality of life for many patients.

Adult↗
PubMed1996

Adult psychophysiologic insomnia and positive history of childhood insomnia.

Sixty-five adults diagnosed with "psychophysiologic chronic insomnia" following the criteria of the Association of Sleep Disorders Centers were investigated. They were subdivided into two groups based on whether onset of the insomnia had occurred in childhood or adulthood. Fifty similar-aged patients with obstructive sleep apnea syndrome (OSAS) were also investigated and served as a contrast group. All subjects were given polygraphic recordings and structured interviews, and all completed sleep questionnaires after reviewing the questions with an investigator. On many indices evaluating subjective daytime alertness and well-being, the psychophysiologic insomnia patients had scores similar to the OSAS patients. There were no significant differences between the childhood-onset and adult-onset psychophysiologic insomnia patients on most of the investigated items. However, the childhood-onset psychophysiologic insomniinacs had moderately but significantly higher reports of nightmares. This group also reported having had longer sleep latencies, significantly more "fear of the dark" and more frequent nightmares during childhood than the adult-onset group. These statistically significant findings reflected only a moderate increase in subjective scores, however, and in general the childhood-onset and adult-onset psychophysiologic insomnia patients were very similar.

Adult↗