Sleep dysregulation in ADHD children: a systematic review and meta-analysis
Peihua Xian1, Xingxing Sheng1, Sijia Liu2,3
1Shaanxi Key Laboratory of Behavior and Cognitive Neuroscience, School of Psychology, https://ror.org/0170z8493Shaanxi Normal University, Xi'an, China.
Insights
Children with Attention Deficit Hyperactivity Disorder (ADHD) show poorer sleep continuity and increased interruptions compared to typically developing peers. These sleep deficits worsen with age and are more severe in boys, suggesting targeted interventions.
Area of Science:
- Neurodevelopmental disorders
- Pediatric sleep medicine
- Behavioral neuroscience
Background:
- Attention Deficit Hyperactivity Disorder (ADHD) is a common neurodevelopmental disorder in children.
- Sleep abnormalities in children with ADHD are increasingly recognized but remain controversial.
- The influence of age and gender on ADHD-related sleep differences is not well understood.
Purpose of the Study:
- To systematically analyze sleep metrics in children with ADHD compared to typically developing (TD) children.
- To investigate the moderating effects of age and gender on sleep differences.
- To explore the role of specific sleep stages in these differences.
Main Methods:
- Meta-analysis of multimodal sleep data (polysomnography, actigraphy, EEG, questionnaires) from 44 studies (2,239 ADHD children, 57,181 TD children) over three decades.
- Focus on core sleep metrics: total sleep time, sleep efficiency, sleep latency, wake after sleep onset, awakening index, and stage shifts.
- Statistical analysis to identify group differences and moderating effects of age and gender.
Main Results:
- Children with ADHD exhibited significantly impaired sleep continuity (reduced total sleep time, increased stage shifts) and sleep interruption (increased wake after sleep onset, elevated awakening index).
- Sleep process effectiveness was reduced in ADHD children (decreased sleep efficiency, extended sleep latency).
- Age exacerbated ADHD-related sleep deficits, and male children with ADHD showed more severe sleep issues than females. Slow-wave sleep moderated and mediated group differences in the awakening index.
Conclusions:
- ADHD is associated with significant sleep dysregulation, impacting sleep continuity, interruption, and process effectiveness.
- Sleep deficits in ADHD are influenced by age and gender, with males and older children experiencing more severe issues.
- Findings support neurodevelopmental explanations for ADHD sleep problems and suggest gender-specific interventions and neuromodulation targeting slow-wave sleep.
Background:
Attention Deficit Hyperactivity Disorder (ADHD) is a prevalent neurodevelopmental disorder in children. Abnormalities in sleep metrics among ADHD children gradually garnered attention. However, whether significant differences existed in sleep metrics between ADHD children and their typically developing (TD) counterparts remained controversial, with inconsistent conclusions across studies. Furthermore, the potential moderating effects of age and gender on these differential patterns remained insufficiently characterized.
Methods:
The current study systematically analyzed multimodal sleep monitoring data (polysomnography, actigraphy, electroencephalography, and questionnaires) from 34 articles spanning three decades (44 independent studies: 2,239 ADHD children vs. 57,181 TD children), focusing on core sleep metrics (total sleep time, sleep efficiency, sleep latency, wake after sleep onset, awakening index, and stage shifts) and their complex moderating mechanisms.
Results:
The results demonstrated that ADHD children exhibited impaired sleep continuity (reduced total sleep time, increased stage shifts), severe sleep interruption (prolonged wake after sleep onset, elevated awakening index), and abnormal sleep process effectiveness (decreased sleep efficiency, extended sleep latency). Demographic analyses revealed that maturation exacerbated ADHD-related sleep deficits, and male ADHD children had more severe sleep problems than female ADHD children. Furthermore, the moderating effect of gender composition on the awakening index showed interaction effects with other sleep metrics. In addition, slow-wave sleep acted as both a moderator and mediator in group differences of the awakening index.
Conclusions:
These findings provided novel neurodevelopmental explanations for sleep dysregulation in ADHD and proposed clinically translatable strategies involving gender-specific interventions and neuromodulation targeting slow-wave sleep.
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