Emergency Department Use Among Adults with Autism Spectrum Disorders (ASD)

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Abstract

A cross-sectional analyses using Nationwide Emergency Department Sample (2006-2011) was conducted to examine the trends, type of ED visits, and mean total ED charges for adults aged 22-64 years with and without ASD (matched 1:3). Around 0.4% ED visits (n = 25,527) were associated with any ASD and rates of such visits more than doubled from 2006 to 2011 (2549-6087 per 100,000 admissions). Adults with ASD visited ED for: primary psychiatric disorder (15%ASD vs. 4.2%noASD), primary non-psychiatric disorder (16%ASD vs. 14%noASD), and any injury (24%ASD vs. 28%noASD). Mean total ED charges for adults with ASD were 2.3 times higher than for adults without ASD. Findings emphasize the need to examine the extent of frequent ED use in this population.

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Most cited references 25

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Trends and characteristics of US emergency department visits, 1997-2007.

Ning Tang, John Stein, Renee Hsia … (2010)

The potential effects of increasing numbers of uninsured and underinsured persons on US emergency departments (EDs) is a concern for the health care safety net. To describe the changes in ED visits that occurred from 1997 through 2007 in the adult and pediatric US populations by sociodemographic group, designation of safety-net ED, and trends in ambulatory care-sensitive conditions. Publicly available ED visit data from the National Hospital Ambulatory Medical Care Survey (NHAMCS) from 1997 through 2007 were stratified by age, sex, race, ethnicity, insurance status, safety-net hospital classification, triage category, and disposition. Codes from the International Classification of Diseases, Ninth Revision (ICD-9), were used to extract visits related to ambulatory care-sensitive conditions. Visit rates were calculated using annual US Census estimates. Total annual visits to US EDs and ED visit rates for population subgroups. Between 1997 and 2007, ED visit rates increased from 352.8 to 390.5 per 1000 persons (rate difference, 37.7; 95% confidence interval [CI], -51.1 to 126.5; P = .001 for trend); the increase in total annual ED visits was almost double of what would be expected from population growth. Adults with Medicaid accounted for most of the increase in ED visits; the visit rate increased from 693.9 to 947.2 visits per 1000 enrollees between 1999 and 2007 (rate difference, 253.3; 95% CI, 41.1 to 465.5; P = .001 for trend). Although ED visit rates for adults with ambulatory care-sensitive conditions remained stable, ED visit rates among adults with Medicaid increased from 66.4 in 1999 to 83.9 in 2007 (rate difference, 17.5; 95% CI, -5.8 to 40.8; P = .007 for trend). The number of facilities qualifying as safety-net EDs increased from 1770 in 2000 to 2489 in 2007. These findings indicate that ED visit rates have increased from 1997 to 2007 and that EDs are increasingly serving as the safety net for medically underserved patients, particularly adults with Medicaid.

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Cognitive, language, social and behavioural outcomes in adults with autism spectrum disorders: a systematic review of longitudinal follow-up studies in adulthood.

Patricia Howlin, I. Magiati, Xiang Tay (2014)

Although increasing numbers of children diagnosed with Autism Spectrum Disorders (ASD) are now entering adolescence and adulthood, there is limited research on outcomes post childhood. A systematic review of the existing literature was conducted. PsycINFO, PubMed, MedLine and CINAHL were systematically searched using keywords related to ASD and adolescent and adult outcomes. Studies of individuals diagnosed with ASD in childhood and followed up into adulthood were identified and reviewed. Only studies with samples sizes >10, mean age at outcome >16 years and at least one previous assessment in childhood (<16 years) were included. Twenty-five studies meeting criteria were identified. Reported outcomes in adulthood were highly variable across studies. Although social functioning, cognitive ability and language skills remained relatively stable in some studies, others reported deterioration over time. Adaptive functioning tended to improve in most studies. Diagnosis of autism or ASD was generally stable, although severity of autism-related behavioural symptoms was often reported to improve. Childhood IQ and early language ability appeared to be the strongest predictors of later outcome, but few studies examined other early variables associated with adult functioning. Implications of the findings are discussed in relation to methodological challenges in longitudinal outcome research and future research directions. Copyright © 2013 Elsevier Ltd. All rights reserved.

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Autism in adults: symptom patterns and early childhood predictors. Use of the DISCO in a community sample followed from childhood.

Christopher Gillberg, Eva Billstedt, I Gillberg (2007)

Few studies have looked at the very long-term outcome of individuals with autism who were diagnosed in childhood. A longitudinal, prospective, community-based follow-up study of adults who had received the diagnosis of autism (classic and atypical) in childhood (n = 105) was conducted. A structured interview (the Diagnostic Interview for Social and COmmunication disorders--the DISCO) was used in order to evaluate symptoms and symptom patterns 13-22 years after original diagnosis. Childhood measures, including IQ-level at time of childhood diagnosis and communicative speech registered before age 5 years, were studied in relation to the presence of autism symptoms at follow-up. The classical and atypical autism groups were fairly homogeneously impaired in terms of symptoms in the social interaction category whereas other common childhood autism symptoms, including maladaptive and stereotyped behaviours, were more variable in the study group at follow-up. Odd responses to sensory stimuli were still extremely common. Speech before 5 years of age, IQ, gender, diagnosed medical disorder and onset of epilepsy before 5 years were variables that correlated to outcome on the DISCO algorithm for autistic spectrum disorders (Wing & Gould, 1979) concerning style and quality of social interaction, communication style and pattern of self-chosen activities. Social interaction problems were still present in the vast majority of adults with autism/atypical autism, but behavioural impairments were much more variable in adulthood. Almost all cases were reported to show persistent perceptual problems. Certain childhood measures were found to prospectively predict adult social interaction style, communication type, and pattern of self-chosen activities, which still met diagnostic criteria for autism/atypical autism in adulthood.