ADHD symptoms and insistence on sameness in Prader-Willi syndrome.
ADHD and insistence on sameness cluster tightly in Prader-Willi syndrome and together signal conduct problems.
01Research in Context
What this study did
Parents of 58 kids with Prader-Willi syndrome filled out three checklists. The forms asked about ADHD behaviors, rigid sameness, and conduct problems. Children were 4-17 years old and lived at home.
What they found
Most kids scored above the ADHD cutoff. Almost all showed strong insistence on sameness. The two problems overlapped: kids with high ADHD scores also had rigid routines. Both traits predicted more conduct issues like tantrums or aggression.
How this fits with other research
Eisenhower et al. (2006) looked even younger. They found preschoolers with PWS already show severe rituals, and the rituals rise with food preoccupation. Together the studies map a line: sameness traits start early and stay.
Green et al. (2015) and Reus et al. (2013) show the same overlap in community kids with ADHD. Parents rate more ASD-type symptoms when ADHD is also present. The pattern is not unique to PWS; it repeats across diagnoses.
Glenn et al. (2007) seem to disagree. In Down syndrome, repetitive routines can be helpful until mental age 5. In PWS the routines look purely risky. The difference is timing and function: Down routines aid learning, PWS routines block change and predict behavior problems.
Why it matters
When a child with PWS shows hyperactivity or impulsivity, expect rigid rituals too. Screen for both, because the pair forecasts bigger conduct challenges. Build interventions that loosen sameness while treating ADHD symptoms; targeting only one may fail.
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02At a glance
03Original abstract
BACKGROUND: Apart from a pervasive eating disorder, the Prader-Willi (PWS) syndrome is characterized by a distinct behavioural profile comprising maladaptive behaviours, obsessive-compulsive traits and skin picking, all included in the PWS behavioural phenotype. In this study, we present a further delineation of this characteristic behavioural profile by screening for indices of executive dysfunctions related to attention-deficit/hyperactivity disorder (ADHD), immature compulsive-like adherence to sameness and skin picking, and how these features aggregate into symptom constellations in children and adolescents with PWS. METHOD: Parents of 58 individuals with PWS (aged 5-18 years) participated by completing Childhood Routines Inventory (CRI) and Conners' Parent Rating Scale (CPRS-48). RESULTS: Results showed that indices of ADHD and excessive insistence on sameness were common, comorbid and of early onset. They were both associated with conduct problems. Skin picking, appearing as a single and comorbid symptom, was less associated with childlike compulsions and ADHD-related problems. CONCLUSIONS: Findings are discussed in terms of further research in executive dysfunctions in PWS.
Journal of intellectual disability research : JIDR, 2005 · doi:10.1111/j.1365-2788.2005.00690.x