Monday, May 7, 2012

Autism Therapy: How Much is Enough?

A couple weeks back I posted an entry Treat or Treatment? about autism therapies. The article discussed the importance of providing demonstratively effective treatments and not wasting money, your child's time and energy on ineffective methods. This is a follow-up.

Parents approach the right amount of autism intervention as they might think about the dose of cough medicine for their child with a respiratory infection.  How many spoonsful of that pink syrup should I give my daughter on what schedule, to control the cough and so she gets better?  We specify early intervention dose in hours per week instead of spoonsful.  Parents want to know many hours per week of early intervention their children should receive, on what schedule?  They receive a variety of conflicting answers with no one to help them resolve the conflicts.  Most of the people giving advice appear to have an implicit conflict of interest.

Providers of Applied Behavior Analysis early intervention often quote the figure in the 2001 National Research Council study indicating children with autism need a minimum of 25 hours per week of one to one intensive behavioral intervention.  Other ABA providers routinely tell parents they need 30-40 hours per week, as in the 1987 Lovaas study.  Other types of therapists, such as Relationship Development Intervention® and Floortime® therapists often recommend a few hours per week, and encourage parents to implement the rest of the intervention naturalistically on their own.  Few actually conduct another 20 hours per week on their own.   Bob and Lynn Koegel who developed Pivotal Response Training®, don’t specify a certain number of hours per week, but the strategy they suggest suggests that it would involve an intensity similar to RDI® or Floortime®, i.e. 3 to 6 or 8 hours per week.

This ”intensity” question and the corresponding recommendations, seem to imply all children with autism spectrum disorders need more or less the same intensity of intervention in order to make meaningful progress in social and communication skills and reduction of stereotyped, rigid non functional routines.  That is clearly not the case, and a carefully reading of the 2001 NRC recommendations indicates that intensity must be individualized, but it isn’t clear on what basis that will be done.

At the Minnesota Early Intervention Project, we conducted a study with 27 sequentially served young children with autism spectrum disorders from about 2 to 6 years of age at time of program entry, who received from 1 to over three years of therapy ranging from 12 to 37 hours per week (average =22 hours).  All of the children exhibited improvement and 2/3rds were in regular education placements at the conclusion of treatment.  Some had no para-professional support in school and others had part time paraprofessional aides.   The children who made the greatest gains in the shortest period of time were higher functioning children who received 12-15 hours at baseline.  Treatment intensity tapered to 5 or fewer hours per week over the last three months.  All of the children in this group had received naturalistic incidental therapy and very little or no discrete trial intervention. 

I developed the Autism Intervention Responsiveness Scale (AIRS®) as a tool for deciding what type of intervention or combination of interventions would be most effective for a given child (Thompson, 2010, pages 37-9), which is accurate for a large percentage of children.  The result tells you what proportion of DTI, Naturalistic or Blended Intervention is likely to work best for a given child.

While it’s true on overall, children who receive an average of more hours as a group, show greater gains than those with 10 hours or less AS A GROUP, within those groups large individual differences mandate individualization. 

If a high functioning child with Asperger Disorder makes great gains when receiving 15 hours per week of therapy, would he also make similar gains at 25 hours per week?  He probably would.  So why provide more hours of therapy than he needs to achieve the goal?

Some parents and practitioners insist children with autism receive 35 to 45 hours per week of EIB therapy despite professionals’ judgment that their children do not require that intensity.  I have worked with parents who wanted their child to receive over 50 hours per week of therapy, believing more is better. 

Sometimes other parents whose children could very likely benefit from 30 or more hours per week of intervention at intake, based on their presenting profiles, insist their children only receive 10-12 hours per week.  They believe greater treatment intensity would be stressful, which is seldom the case when properly implemented for the appropriate child.  Studies indicate that around 75% of the gains that are going to be made for most children with autism during EIBI come in the first 12 months.  That is why beginning with 10 hours per week instead of 30 hours (if that is what the child actually needs) may very well lead to far lesser gains than could have been obtained have more appropriate intensity be used.

Here are some of the consequences of failing to individualize treatment intensity.

1. There is little evidence more hours of therapy benefits children who does not require more intensity. It’s like drug dose.  If someone needs 50mg of a medication, giving them 100mg will usually not help, and may cause side effects.  Children who need 10-15 hours per week of naturalistic intervention will often resist more hours of intensive discrete trial intervention, which has little benefit for them.  Some develop tantrums when required to participate in six hours per day of discrete trial intervention, but happily participate in fewer hours of naturalistic therapy.

2.     It is waste of money to conduct early intervention therapy with more intensity than is necessary.   The average cost difference between 15 and 35 hours per week would be approximately $50,000 per year per child.

3.     Naturalistic therapy focuses on somewhat different skills than discrete trial intervention, (e.g. choice, spontaneous social initiations and conversational language) which has implications for whether more hours of a discrete trial approach is used or fewer hours of a naturalistic approach or a blended combination, which we have used for most children.  Children with severe symptoms and mild to moderate intellectual disability often require more intensity with emphasis on basic cognitive skills, and more basic communication skills.

The second complicating factor with treatment intensity is that almost all parents of children with autism seek multiple services for their children.  There is intensity, and effective intensity.  Mom and Dad are usually told by pediatricians their child needs several therapies, and their friends strongly urge them to participate in a wide array of treatments, most of them untested.  The average number of different services per child with whom I worked at the Minnesota Early Autism Project was five per week.   At a minimum, in addition to early behavioral intervention, most children with autism also received Speech Therapy, Occupational Therapy, (sometimes both privately and at school) and Early Childhood Special Education. 

Commonly, children with autism were also given lessons or therapy of various extra kinds, such as Chiropractic, RDI®, Floortime®, Physical Therapy, private social skills classes, Patterning, swimming, martial arts, music therapy, horse-back riding, and art therapy or classes.  Half of the children with whom I have worked participated in seven different types of therapy or educational activities or more per week.  Each of these therapists or instructors interacted with the child in different ways, using different instructions and different consequences, which at best, is very confusing to the child, more likely disruptive.  It also creates a crazy quilt schedule involving schlepping the child from therapist to therapist, sometimes as many as three in a single day.   

How would you like being dropped off at school at 8:00am, then picked up by your Mom from school at 11am, schlepped home for a bowl of soup and bologna sandwich and a glass of milk for a quick lunch, then hustled off to Speech Therapy, and then taken to Karate lessons, and then brought home for a quick supper, and then afterward, Dad takes you to swimming before bedtime?  This sounds more like the child is being prepared to be a wheeler-dealer hedge fund manager, with an stomach ulcer and drinking problem, than a child with autism.  Everything we know about the make up of children with autism indicates this is a very bad idea.  Youngsters on the autism spectrum thrive on predictable, simple routines and consistent social demands carefully crated to fit with their abilities and traits.  They are made anxious by multiple and unpredictable social demands.   But parents fear they are short-changing their child if they don’t enroll him or her in an array of treatments. As Kurt Vonnegut wrote in Slaughterhouse Five, "So it goes."

When we refer to “treatment intensity,” we need to consider ALL of the demands being made on a child with autism.  Thirty hours of 1:1 behavioral intervention is supplemented with a minimum of five to fifteen additional hours of various other therapies or educational activities.  

I know of no evidence that this potpourri of multiple interventions has any beneficial effects for children with autism whatsoever.  There have been no studies of outcomes conducted in which children had EIBI, speech and special education alone, or a comparison group with multiple therapies.  We do know children with autism benefit from EIBI, some types of speech therapy and participation in appropriate special education services, but there is almost no evidence from any controlled studies that any of the other interventions listed are beneficial.  Parents often say, “If we're not sure it will help, why not provide them anyway, just in case?”

How much money do parents waste each week for this complex array of unnecessary services for their children?  Some, such as physical therapy ($140 per session), and chiropractic ($65 per session), social skills sessions ($75-150 per session), RDI® ($50-70 per week) and Floortime® ($50-75 per week) are usually reimbursed by insurance or Medicaid, which in a round about way, means the taxpayers pay for them.  This would amount to a minimum of another $16,500 per year per child.  If a child has a diagnosable physical disability as well as autism, physical therapy is appropriate, but the rest, which involve out of pocket or medical insurance expenditures are difficult to rationalize.   Laying out more than $16,000 per year per child, “just in case” just doesn’t make sense.

Minnesota Early Autism Project

Thompson, T (2010) Individualized autism intervention for young children; Blending naturalistic and discrete trial approaches.  Baltimore: Paul H. Brookes, Inc

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