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Many of
you are already familiar with the results of the MTA study, the largest
treatment study of ADHD every conducted.
The goal of this study was to compare the effectiveness of carefully
conducted medication treatment, intensive behavioral treatment, the
combination of medication and behavioral treatment, and typical treatment for
ADHD as practiced in community. Participants
in this study were 579 children between the ages of 7 and 9.9 who had been
carefully diagnosed with ADHD, Combined Type.
Although children in all 4 treatment groups showed significant
improvement, those in the medication-only group and the combined-treatment
group had significantly greater improvement in their core ADHD symptoms than
children given only intensive behavioral treatment or community care. There was also evidence that combined
treatment provided a modest incremental benefit compared to careful
medication treatment alone.
An important question not
fully addressed in the initial analyses of = the MTA results is whether
treatment response may vary as a function of the other conditions a child may
have in addition to ADHD (i.e. co-morbid conditions). Unfortunately, it is
well known that children with ADHD often have other conditions as well,
including Oppositional Defiant Disorder (ODD), Conduct Disorder (CD), mood
disorders, and anxiety disorders.
These co-morbid
conditions can complicate a child’s treatment and tend to be associated with
a poorer long-term prognosis.
Therefore, it is very important to carefully examine whether the
presence of these other difficulties affects the type of impairments that
children have, how they respond to treatment, and the type of treatment that is
likely to be most helpful. (Note: In
the MTA study, medication and behavioral treatment were the only ones
investigated because they are the interventions with the strongest empirical
support at this time.)
(Note: Some of the children diagnosed with anxiety
disorders had mood disorders as well.)
Diagnoses and assignment to the different groups were based on
structured psychiatric interviews conducted with parents, and thus do not
reflect children’s own reports of fears, worries, and other symptoms of anxiety.
Results
A number of different
baseline and outcome measures were collected in this study, including core
symptoms of ADHD, oppositional/aggressive behavior, academic achievement,
anxiety and depression symptoms, social skills, and parent-child relations. Although the results varied across these
different measures, there are several important general conclusions that can
be made.
Parents of children with ADHD and ODD/CD report
greater difficulty with their child than parents of children with ADHD and an
anxiety disorder.
An important exception to
this general pattern is that children with ADHD and an anxiety disorder were
more likely to have academic problems and to be diagnosed with a learning
disability.
Overall, children with ADHD and an anxiety disorder
tended to be more treatment responsive than children with ADHD alone or
children with ADHD and ODD/CD
Children with ADHD and an
anxiety disorder showed a positive response to all 3 MTA treatments (i.e.
medication only, behavior therapy only, and combined treatment) and tended to
show greater improvement than children in the other groups. Thus, although children in the other groups
also showed important benefits from treatment, the treatment gains for children
with ADHD and an anxiety disorder tended to be slightly greater.
Behavioral interventions were particularly likely to
be helpful for children with ADHD and an anxiety disorder.
On a number of specific
outcome measures, including measures of academic achievement, as well as an
overall composite measurement of outcome, children with ADHD and anxiety were
more likely to show a positive response to behavioral treatment than were
children in the other groups.
Unlike the children in
the other groups, these children did as well with behavior therapy alone as
they did with medication alone.
For children with ADHD only, or ADHD and ODD/CD,
treatments with medication seem especially effective, while behavioral
treatment alone may be less effective.
Children with ADHD alone
or ADHD and ODD/CD showed relatively little response to intensive behavioral
therapy only. The use of carefully
conducted medication treatment thus seems especially important for these
types of ADHD children.
For ADHD children who also have both an anxiety
disorder and ODD/CD, the use of combined treatment (i.e. medication and
behavior therapy) may offer substantial advantages.
For these children with
the most complex set of symptoms, overall outcome for combined treatment was
significantly better than for either behavioral treatment or medication
treatment alone.
Summary and
Implications
These findings add
substantially to the main results of the MTA study and have clinical
implications that are potentially important for parents and clinicians. First, it appears that children with ADHD
and a co-morbid anxiety disorder may be especially likely to have concurrent
academic problems and learning disabilities.
Thus, for these children, it would be especially important for this
possibility to be carefully considered and investigated. Although this is likely to occur in a
comprehensive evaluation conducted by a child mental health specialist, this
may be short-changed because of insurance-imposed limitations. In addition, primary care physicians may
not always have the training that enables a careful assessment of academic
functioning and learning difficulties to be completed.
Second, for children with
ADHD and an anxiety disorder, carefully executed behavioral treatment may
yield treatment gains that are equivalent to what would be provided by
medication. Thus, in situations where
parents have strong concerns about the use of medication, where children do
not benefit from it, or, cannot tolerate it, behavioral treatment alone can
be a reasonable treatment choice for these children. For these children, beginning treatment
with behavior therapy alone and carefully monitoring their progress may
alleviate the need for medication in many instances.
Third, parents and
clinicians should be aware that in children with ADHD alone, or ADHD with ODD/CD,
the use of carefully conducted medication therapy is likely to be especially
critical. In the MTA study, these
children did not respond well to medication treatment alone even though they
showed robust responses to medication.
When an anxiety disorder is also present, however, the addition of
behavior treatment may confer some important incremental benefits.
As with any study, there
are several important caveats to keep in mind. First, these results apply specifically to
children with the combined sub-type of ADHD between the ages of 7 and
10. The extent to which they would
generalize to children with other ADHD subtypes (i.e. inattentive or
hyperactive-impulsive) and of different ages is unknown. Second, there are always individual
exceptions to results that are derived from comparing groups. Thus, although these results indicate what
is more likely to be true about a specific child (e.g. a child with ADHD
alone is likely to respond better to medication treatment than to behavioral
treatment), there are always exceptions at the individual level. Most importantly, the results from the MTA
study are based on both medication and behavioral treatment that can be
considered state-of-the-art. For
example, children receiving medication treatment began with a = careful
placebo-controlled trial to determine their optimum starting dose, and were
then carefully monitored each month to determine when modifications to dosage
or even type of medication were necessary.
Behavioral treatment included extensive work with parents, an 8-week
summer program for children, and an intensive behavior management system at
school. Unfortunately, this is not the
type of medication treatment or behavioral treatment that is typically
provided in community settings. In
fact, one of the main findings of the MTA study is that children receiving
medication treatment or combined treatment in the study did significantly
better than those whose treatment occurred in the community. Thus, one cannot assume, for example, that
the behavior treatment most children have access to = would show the same
positive impact on children with ADHD and an anxiety disorder that was shown
in this study.
Rather than being
discouraged by this possibility, however, it is important for parents to
learn as much as they can about what these state-of-the-art MTA treatments
entailed, and to do their best to make sure that the treatment received by
their child matches this to the extent possible. With medication treatment, for example,
even though the entire = placebo-controlled procedure would be hard to follow
exactly, it is quite possible to incorporate several important elements of
this procedure, including: testing a child on a full range of doses,
obtaining systematic feedback from teachers on the child’s behavior and
school work on each dose, and obtaining such feedback on a regular basis to
determine when treatment modifications may be necessary. These simple steps can make an important
difference.
New Evaluation and Treatment Guidelines From an
Expert Panel
The Journal of Attention
Disorders recently published a special issue in which the results of a
large-scale survey conducted with ADHD experts from medical and psychology
backgrounds were reported. The goal of
this survey was to establish guidelines that address important clinical
issues for which there may currently be little controlled scientific
evidence, but for which there exists considerable experience in clinical
practice. By obtaining and summarizing
the opinions of a large number of experts (i.e. 44 physicians and 47
psychologists, representing 86% and 94% of the individuals to whom a survey
was sent), the results create a set of guidelines that can be informative to
both parents and practitioners.
As noted above, the survey
was designed to obtain and synthesize expert opinion on issues that are not
yet fully addressed in the research literature on ADHD. The designers of the survey were themselves
recognized ADHD experts (Keith Conners is the lead author) and are careful to
note that because individuals with ADHD can vary so widely along multiple
dimensions, the consensus recommendations will certainly not be appropriate
in all circumstances. They are also
careful to note that the survey was financially sponsored by the
pharmaceutical industry, and describe the steps taken to avoid having this
bias the results. The major effort
here was to present data from every respondent so that readers can compare
the summary guidelines with the raw data on which each guideline is based.
It is also noted
appropriately that the guidelines represent current expert opinion, and that
expert opinion at any given time can be revealed by future studies to be
wrong. For example, future studies may
indicate that treatments currently regarded as “alternative”, and thus not
generally recommended, are actually quite helpful in many cases and should be
considered to be important treatment options.
The important point here is that any set of recommendations can only
be based on the best available evidence, and should this evidence change over
time, so will the recommendations.
Survey results were
summarized to produce guidelines in multiple areas, including the assessment
and treatment of ADHD, how these vary depending on the type of ADHD (i.e.
combined, inattentive, or hyperactive-impulsive), and the age of the
client. Particular attention is given
to important clinical issues such as what to do when treatment is only
partially effective or even ineffective, what constitutes adequate
monitoring, and how the current state of treatment for ADHD can be
improved. Reviewing the entire set of
guidelines is beyond the scope of what can be presented here, and the focus
in this issue will be on three particular points: selecting an initial
treatment strategy, changing the treatment regimen when response is judged to
be inadequate, and what constitutes appropriate ongoing care.
Selecting an
initial treatment strategy
The question facing the
experts here was how to sequence the treatments for ADHD—whether to begin
with medication alone, psychosocial treatment alone, or a combination of both
from the start. Experts were told to
assume that both types of treatment would be available, and to rank order
their recommendations in terms from most to least preferred option. It is reasonable to assume that by
psychosocial treatment, the experts were referring to the types of
non-medical interventions for ADHD for which empirical support has been shown,
including parent training, clinical behavior therapy, skills-based training,
psycho-educational interventions, etc.
Psychosocial
treatment alone
Starting with
psychosocial treatments alone was the consensus recommendation in situations
where ADHD symptoms were judged to be mild and/or when the child was of
preschool age. In cases where there
was a co-occurring internalizing problem (i.e. mood or anxiety disorder),
beginning with a psychosocial intervention alone and beginning with a
combination of medication and psychosocial treatment were rated equivalently.
Combined
treatments
Situations where combined
treatment was viewed as an equally appropriate initial treatment strategy to
medication or psychosocial intervention alone are described above. In addition, combined treatment was
regarded as the best initial option for individuals with the predominantly
inattentive subtype of ADHD, for children and adolescents, and/or when there
are co-occurring behavior disorders (i.e. Oppositional Defiant Disorder or Conduct
Disorder). The consensus opinion of
these experts thus shows a strong preference for combined treatment. For children and adolescents, this would be
the preferred option except in cases where symptoms were judged to be mild
(i.e., psychosocial treatment alone would be reasonable here), or when there
is a strong preference for one treatment approach vs. the other. The preference for combined treatment is
consistent with MTA study results in which
the researchers found a modest, but statistically significant,
advantage for combined treatments over medication alone for several specific
outcomes and for an overall composite of the different outcomes considered.
Changing the treatment regimen
An issue closely related
to the choice of initial treatment strategy is the appropriate time to change
treatment regimens when the response has been inadequate. Several factors were deemed important to
evaluate before making any such change.
Before making changes to medication treatment, the following steps
were advised:
Ensure adequate dosage:
In many instances, patients may be receiving a dosage that is too low to
provide maximum benefit, and adjusting the dose can yield significant
additional benefits. This often occurs
when researchers do not test a full range of during an initial trial, but instead
use the first dose on which some improvements are evident as the maintenance
dose.
Evaluate for compliance
problems: Being certain that medication is actually being taken as instructed
is necessary before changing medications or deciding medication will not
provide important benefits.
Ensure coverage across
waking hours - It is important to make sure the type of medication and/or
dosing schedule provides adequate coverage across the period of time when
symptom management is critical. (Note:
Now that medications with longer durations have become available—e.g.,
Concerta—this may be easier to ensure than when multiple daily doses are
required as with regular methylphenidate.)
In regards to switching
medications when a positive response to the initial medication choice is not
obtained, the panel strongly recommended that several different stimulants be
given a thorough trial before trying a different class of medication (e.g.
switching to an anti-depressant).
Adding new meds rather than
trying another type of stimulant first was also not a preferred option.
In cases where medication
alone has been used to begin treatment, the consensus was that psychosocial
treatment should be added when no response has been noted over a 5-week
period of careful trials. In
situations where only a partial response (i.e. some symptoms clearly remain
and impair functioning), it was recommended that psychosocial interventions
be added after 7 weeks. When psychosocial
treatment alone has been the initial strategy, the experts advised adding
medication when a month has elapsed with no response, and waiting between 6-7
weeks when at least a partial response has been obtained.
What is an
appropriate level of maintenance care?
One of the real drawbacks
in the care that many children with ADHD receive is the lack of adequate
monitoring and follow-up. In addition,
those receiving medication often stop taking it prematurely. The guidelines in this section are thus especially
important to note.
For children/adolescents
who respond well to medication, it is suggested that medication be maintained
on the dosage determined to be most effective for 1-2 years before trying to
taper it. A typical duration of medication
treatment for good responders ranged from 2-10 years. For adults, it was recommended that those
showing an excellent medication response continue to take it for 2-5 years
before trying to taper or discontinue.
For individuals who have had an excellent
response to medication treatment (i.e. symptoms have been fully normalized with
no residual impairment), it was advised that follow-up visits be scheduled
every 3 months. In cases where only
partial response has been obtained, the consensus opinion called for monthly
visits. Thus, ongoing monitoring of
treatment response is seen as essential. For psychosocial interventions,
weekly visits are recommended during the first 6 months of treatment. A range of 7-20 visits would be held during
this period depending on response.
This figure is for an “uncomplicated ADHD patient”, and would need to
be increased when difficulties were more pronounced than is typical. 6-12
months after treatment has been initiated, booster sessions were recommended
to be held every 1-3 months once symptoms have been fully normalized, and 1-2
times each month when there has been only a partial
response.
Sessions for ongoing monitoring beyond 12 months should take place 1
to 2 times per year for children and adolescents, and as needed for adults.
Summary
The recommendations above
are important in that they reflect the most widely held views among a large
number of experts. As noted above,
these guidelines will not apply to every individual, and treatment decisions
for specific individuals can be influenced by a wide variety of factors that
no set of guidelines can fully capture.
In cases where treatment choices fall clearly outside of these
guidelines, however, it would be important to be able to specify the factors
that have resulted in what would be considered atypical recommendations.
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