Brant W. Riedel

Quantitative criteria for insomnia

Formal diagnostic systems (DSM-IV, ICSD, and ICD-10) do not provide adequate quantitative criteria to diagnose insomnia. This may not present a serious problem in clinical settings where extensive interviews determine the need for clinical management. However, lack of standard criteria introduce disruptive variability into the insomnia research domain. The present study reviewed two decades of psychology clinical trials for insomnia to determine common practice with regard to frequency, severity, and duration criteria for insomnia. Modal patterns established frequency (> or =3 nights a week) and duration (> or =6 months) standard criteria. We then applied four versions of severity criteria to a random sample and used sensitivity-specificity analyses to identify the most valid criterion. We found that severity of sleep onset latency or wake time after sleep onset of: (a) > or =31 min; (b) occurring > or =3 nights a week; (c) for > or =6 months are the most defensible quantitative criteria for insomnia.

Fair tests of clinical trials: A treatment implementation model

Abstract We propose a psychotherapy treatment implementation model whereby adequate levels of independent treatment components (delivery, receipt, and enactment) are prerequisite to asserting whether a valid clinical trial has been conducted. The delivery component refers to the accuracy of treatment presentation, receipt refers to the accuracy of the clients comprehension of treatment, and enactment refers to the extent of out of session application initiated by the client. Clinical scientists regularly address one or two of these components, but rarely all three, according to a survey we report. Sources and effects of model deficits, i.e., inadequate levels of treatment components, as well as methods of component assessment and induction, are discussed. We conclude that faults in any one of the components drain validity proportional to the degree of deficit, and that clinical trials have often incorrectly been considered fair tests, resulting in biased efficacy judgments.

Sleep compression and sleep education for older insomniacs: self-help versus therapist guidance

A treatment package consisting of a bed-time restriction strategy and education was administered to 50 insomniacs and 50 noninsomniacs 60 years or older. Half of the insomniacs and noninsomniacs received treatment through a self-help video only, whereas the remaining treated participants received therapist guidance to supplement the video. A waiting-list control group of 25 senior insomniacs was also included. Sleep knowledge was equivalent for senior insomniacs and noninsomniacs. The self-help insomniac group exhibited improvement on multiple sleep variables, but the addition of therapist guidance appeared to enhance treatment outcome for sleep latency, wake time after sleep onset, and sleep satisfaction. Control participants also improved across time but were generally outperformed by treated insomniacs.

Relaxation and sleep compression for late-life insomnia: a placebo-controlled trial.

Older adults with insomnia were recruited from the community and randomized to treatments: relaxation, sleep compression, and placebo desensitization. Questionnaire data collected at baseline, posttreatment, and 1-year follow-up and polysomnography data collected at baseline and follow-up yielded the following conclusions: All treatments improved self-reported sleep, but objective sleep was unchanged. Clinical significance analyses yielded the strongest findings supporting the active treatments and suggested that sleep compression was most effective. Results partially supported the conclusion that individuals with high daytime impairment (i.e., fatigue) respond best to treatments that extend sleep, as in relaxation, and individuals with low daytime impairment respond best to treatments that consolidate sleep, as in sleep compression. Strong methodological features including a placebo condition and a treatment implementation scheme elevate the confidence due these findings.

Epidemiology of Sleep : Age, Gender, and Ethnicity

Contents: Goals and Distinctive Characteristics of This Survey. A Review of Epidemiological Studies of Insomnia and Sleep. Methods of This Survey. An Archive of Normal Sleep. An Archive of Insomnia. An Archive of the Sleep of African Americans. Summary of Main Findings. Appendix: Alphabetical Listing of Abbreviations and Acronyms.

Socioeconomic status and insomnia

This investigation compared the likelihood of insomnia and insomnia-related health consequences among individuals of different socioeconomic status. A random-digit dialing procedure was used to recruit at least 50 men and 50 women in each age decade from 20 to 80+ years old. Participants completed 2 weeks of sleep diaries as well as questionnaires related to fatigue, sleepiness, and psychological distress. Socioeconomic status was measured by education status assessed at 3 different levels: individual, household, and community. Results indicated that individuals of lower individual and household education were significantly more likely to experience insomnia even after researchers accounted for ethnicity, gender, and age. Additionally, individuals with fewer years of education, particularly those who had dropped out of high school, experienced greater subjective impairment because of their insomnia.

Behavioral assessment and treatment of insomnia: A review with an emphasis on clinical application

We reviewed behavioral and related nonpharmacologic treatments for insomnia, as well as salient diagnostic and assessment issues. The paper evaluates the scientific status of the existing literature, giving greater weight to the literature of the past decade, and offers practical, clinical recommendations for assessment and treatment that derive from the literature. We found that treatments for insomnia, namely relaxation, cognitive behavior therapy, stimulus control, sleep restriction, and sleep hygiene are all effective to varying degrees, and it is both practically feasible and clinically desirable to favor a tailored package treatment approach rather than relying on unitary interventions. Overall, we underscored the importance of comprehensive, developmentally tuned assessment, and we concluded that behavioral treatment of insomnia has demonstrated strong success. Promising areas for future inquiry include comparing nonpharmacologic vs. hypnotic treatments and exploring the utility of very brief and self-help interventions.

The Relation Between Smoking and Sleep: The Influence of Smoking Level, Health, and Psychological Variables

The relation between smoking and sleep was examined in a randomly selected sample of 769 individuals (379 men and 390 women, ages 20 to 98). Participants completed 2 weeks of sleep diaries, provided a global report on their sleep, indicated the number of cigarettes smoked per day, and supplied information on health, depressive symptoms, anxiety, and caffeine and alcohol use. After controlling for demographic, health, psychological, and behavioral variables, light smoking (< 15 cigarettes per day), but not heavier smoking, was associated with self-reported chronic insomnia and reduced sleep diary total sleep time and time in bed. Smokers did not differ significantly from nonsmokers on diary measures of sleep-onset latency, number of awakenings during the night, wake time after sleep onset, or sleep efficiency.

Strategies for evaluating adherence to sleep restriction treatment for insomnia

The methodology of assessing adherence to sleep restriction therapy for insomnia has received little attention in the empirical literature. The present study proposes and evaluates several approaches to assessing adherence to sleep restriction. We investigated multiple methods of measuring adherence and tested their utility by determining the strength of their association with treatment outcome in a sample of 22 older adults with insomnia (16 women, six men). As a group, the measures indicated reasonably good adherence to treatment recommendations. Time spent in bed was significantly reduced at post-treatment, and the night to night consistency of time spent in bed and arising time was significantly greater at post-treatment. However, time spent in bed per night at post-treatment still exceeded therapist recommendations by a mean of 27.89 min (SD=31.72). Greater consistency of time spent in bed per night and a more consistent arising time predicted a better treatment outcome. Measures of degree of bedtime reduction did not predict treatment outcome.

What motivates adolescent smokers to make a quit attempt

A sample of 120 adolescent smokers (80 males, 40 females), most of whom were referred by school personnel after being caught with cigarettes at school (n=113), reported motivations for making a quit attempt during a smoking cessation project. Most students (n=76) were randomly assigned to a four session cessation program that included discussion of a number of motivational topics, and the remaining students were assigned to a self-help control group that received a pamphlet recommending strategies for quitting. Reported motivations for quitting did not differ significantly across the two treatment conditions. Concern about future health (73%) was the most popular reason given for making a quit attempt, followed by concern about current health (65%). Concerns about physical appearance (59%), the cost of cigarettes (52%), and athletic performance (51%) were also listed as motivators by a majority of the participants. Future health was the most popular choice for the most important motivator to quit (35%). Females and participants with fewer best friends smoking were more likely to report that the prevalence of non-smoking teenagers, the relationship between smoking and weight, and physical appearance concerns were motivators to quit. African Americans were more likely than Whites to list current health concern as the most important motivator.