Psychometric properties of a sleep questionnaire for use in individuals with intellectual disabilities
sleep disturbance/disorders; Rett syndrome; cri-du-chat syndrome; Jacobsen syndrome; tool development; scale development
We examined the psychometric properties of one part of the Sleep Questionnaire developed by Simonds and Parraga (SQ-SP; 1982), a questionnaire that is frequently used to explore sleep problems and behaviors related to sleep in individuals with intellectual disability (ID). The SQ-SP was completed for 345 individuals with ID (sleep clinic n = 146; control group n = 103; published studies n = 68; psychiatric clinic n = 28). Internal consistency was good (Cronbach's alpha = .80) and test-retest reliability for the total SQ-SP score was also good (Spearman's rank correlation = .83, p < .01). Convergent validity was adequate (r = .79, p < .001) and concurrent validity was satisfactory (r = .52, p < .001). Exploratory factor analysis suggested a 5-factor structure (Snoring. Daytime sleepiness, Complaints related to sleep, Sleep apnea and Anxiety related to sleep). Internal consistency of the five factors ranged from modest (Cronbach's alpha = .57) to good (Cronbach's alpha = .82). Confirmatory factor analysis corroborated the 5-factor structure. The Composite Sleep Index, the total SQ-SP score and the factor scores on Daytime Sleepiness and Complaints related to sleep were able to differentiate the control group from the sleep clinic group. The SQ-SP appears to be a reliable and valid tool in assessing sleep and different types of sleep disturbance in individuals with ID. (C) 2011 Elsevier Ltd. All rights reserved.
Maas A; Didden R; Korzilius H; Braam W; Collin P; Smits M G; Curfs L M G
Research in Developmental Disabilities
2011
Article information provided for research and reference use only. PedPalASCNET does not hold any rights over the resource listed here. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.1016/j.ridd.2011.07.013" target="_blank" rel="noreferrer noopener">10.1016/j.ridd.2011.07.013</a>
Sleep in individuals with Cri du Chat syndrome: a comparative study
Middle Aged; Male; Infant Newborn; Severity of Illness Index; Statistics Nonparametric; Young Adult; Surveys and Questionnaires; Child; Humans; Adult; Adolescent; Prevalence; Female; Child Preschool; Infant; Cri-du-Chat Syndrome/ep [Epidemiology]; Sleep Wake Disorders/di [Diagnosis]; Sleep Wake Disorders/ep [Epidemiology]; Cri-du-Chat Syndrome/ge [Genetics]; Genetic Testing; sleep disturbance/disorders; Cri-du-chat; trajectory; characteristics
BACKGROUND: Sleep problems are common in individuals with intellectual disability. Little is known about sleep in children and adults with Cri du Chat syndrome (CDC).;METHOD: Sleep was investigated in 30 individuals with CDC using a sleep questionnaire. Sleep problems and sleep behaviours in individuals with CDC were compared with individuals with non-specific intellectual disabilities (NS) (n = 30) and Down's syndrome (DS) (n = 30).;RESULTS: Nine individuals with CDC (i.e. 30%) had a sleep problem, compared with seven individuals with NS (i.e. 23%) and three individuals with DS (i.e. 10%). Though there were few differences between diagnostic groups, night waking problems were most common in CDC. Individuals with CDC frequently showed behaviours related to disordered breathing and poor-quality sleep. Several behaviours related to sleep had a higher occurrence in CDC than in DS (P < 0.05) but not in NS.;CONCLUSIONS: It is concluded that individuals with CDC do not have an increased probability of sleep problems as compared with other individuals who share similar demographic characteristics. Hypotheses about causes of night waking problems in CDC are generated and suggestions for future research of sleep in individuals with CDC are given.
Maas A P; Didden R; Korzilius H; Braam W; Smits M G; Curfs L M
Journal of Intellectual Disability Research
2009
Article information provided for research and reference use only. PedPalASCNET does not hold any rights over the resource listed here. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.1111/j.1365-2788.2009.01184.x" target="_blank" rel="noreferrer noopener">10.1111/j.1365-2788.2009.01184.x</a>
Melatonin treatment in individuals with intellectual disability and chronic insomnia: a randomized placebo-controlled study
Saliva; Middle Aged; Treatment Outcome; Humans; Adolescent; Child Preschool; Double-Blind Method; Time Factors; Central Nervous System Depressants/adverse effects/therapeutic use; Melatonin/adverse effects/therapeutic use; Mental Retardation/epidemiology/psychology; Sleep Initiation and Maintenance Disorders/drug therapy/epidemiology/psychology; Q3 Literature Search; chronic disease; child; female; male; adult; comorbidity; aged; sleep disturbance/disorders; chromosome 18q deletion; MPS III; pharmacologic intervention; melatonin
BACKGROUND: While several small-number or open-label studies suggest that melatonin improves sleep in individuals with intellectual disabilities (ID) with chronic sleep disturbance, a larger randomized control trial is necessary to validate these promising results. METHODS: The effectiveness of melatonin for the treatment of chronic sleep disturbance was assessed in a randomized double-blind placebo-controlled trial with 51 individuals with ID. All of these individuals presented with chronic ideopatic sleep disturbance for more than 1 year. The study consisted of a 1-week baseline, followed by 4 weeks of treatment. Parents or other caregivers recorded lights off time, sleep onset time, night waking, wake up time and epileptic seizures. Endogenous melatonin cycle was measured in saliva before and after treatment. RESULTS: Compared with placebo, melatonin significantly advanced mean sleep onset time by 34 min, decreased mean sleep latency by 29 min, increased mean total sleep time by 48 min, reduced the mean number of times the person awoke during the night by 0.4, decreased the mean duration of these night waking periods by 17 min and advanced endogenous melatonin onset at night by an average of 2.01 h. Lights off time, sleep offset time and the number of nights per week with night waking did not change. Only few minor or temporary adverse reactions and no changes in seizure frequency were reported. CONCLUSIONS: Melatonin treatment improves some aspects of chronic sleep disturbance in individuals with ID.
Braam W; Didden R; Smits M; Curfs L
Journal of Intellectual Disability Research
2008
Article information provided for research and reference use only. PedPalASCNET does not hold any rights over the resource listed here. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.1111/j.1365-2788.2007.01016.x" target="_blank" rel="noreferrer noopener">10.1111/j.1365-2788.2007.01016.x</a>