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Book Title: Treating and Preventing Adolescent Mental Health Disorders
> pp. [115]-[119]
UNDEFINED: AUTHORS
Treating and Preventing Adolescent Mental Health Disorders
Print ISBN 9780195173642, 2005
pp. [115]-[119]
problem-solving approach suggests modest benefits on very discrete areas of social functioning that appear to have some durability. Although such research seems old-fashioned and potentially out of sync with the dilemmas and challenges facing an adolescent suffering from schizophrenia, the approach may have merits. For a child, the transition into adolescence and then adulthood is a difficult process requiring support and structure. Development of schizophrenia during this process can disrupt personal development in an infinite number of ways. Therefore, there is a real need for research among groups of adolescents with schizophrenia into developing ways to teach them social skills that generalize to real life.
Successful family therapies have psychoeducation at their heart, taking the form of a collaborative respectful relationship with the family, provision of information, and teaching of family members less stressful ways of communicating and solving problems. It seems intuitive that family interventions, in a nonspecific sense, would be particularly beneficial for adolescents with schizophrenia, especially those who remain still dependent on their parents. The need for intervention is supported by reports that children with schizotypal personality disorder or schizophrenia and the parents of such children tend to show increased rates of thought disorder during direct family interactions (Tompson, Asarnow, Hamilton, Newell, & Goldstein, 1997). Some reports claim that the parents also show increased communication deviance (an index of difficulties associated with a failure to establish and maintain a shared focus of attention; Asarnow, 1994). It is not possible to know at this stage whether this represents a shared genetic vulnerability to psychosis or a parental response to their child's illness. Additional support comes from the work on expressed emotion (EE). Although this was originally investigated in adult populations, most data assessing family interventions in adolescents are based on EE. The concept of EE, which encompasses critical comments, hostility, and
overinvolvement, arose out of a body of research focused on the effect of the family environment on the maintenance of schizophrenia and other severe mental disorders (Brown, Monck, Carstairs, & Wing, 1962). Family interventions evolved, again targeted at adults, that aimed to reduce high EE and thus reduce relapse rates (Leff, Kuipers, Berkowitz, Eberlein-Vries, & Sturgeon, 1982).
The applicability of therapies directed at high EE in adolescent schizophrenia is hampered by three problems. First, adolescent families have less EE or different EE. Asarnow, Tompson, Hamilton, Goldstein, and Guthrie ( 1994) found relatively low parental EE (compared to families of adults with schizophrenia) when measuring criticism and overinvolvement on the Five-minute Speech Sample Expressed Emotion (FMSS-EE) scale. Twenty-three percent of families of adolescents with schizophrenia or schizotypal personality disorder were rated as having high EE, compared to 44% of families of adults with schizophrenia in a similar study by Miklowitz et al. ( 1989). The second problem in using EE-related therapies for adolescents is the lack of stability over time and lack of response to treatment. Lenior, Dingemans, Schene, Hart, and Linszen ( 2002) conducted a longitudinal study to analyze the stability of parental EE in individuals with recent-onset schizophrenia, aged 15 to 26 years, in the 8 years following discharge from two interventions from inpatient care: community care alone and community care with additional family intervention according to the model of Falloon, Boyd, and McGill ( 1984). The families were stratified according to high and low EE before allocation and EE was measured over the follow-up period using the FMSS. According to these measurements, EE did change over time, although the study failed to detect any overall treatment effect on EE levels. In addition, this group found no intervention effect on the number of months of psychosis during 5-year follow-up. Nugter, Dingemans, van der Does, Linszen, and Gersons et al. ( 1997) studied individuals,
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aged 16 to 25, with recent-onset schizophrenia and related disorders who were randomly allocated to individual treatment with or without a family intervention (modeled on Falloon et al., 1984). At the end of treatment (1 year), there were no significant between-group differences in EE (as assessed by the FMSS). There were no detectable relationships between EE and relapse, except that in the individual group, changeable EE (in whichever direction) was correlated with relapse rate. The third difficulty with using EE in treatment for adolescents is its lack of specificity to schizophrenia. A meta-analysis of EE-outcome relationships in mental disorders (Butzlaff & Hooley, 1998), though confirming EE as a significant predictor of relapse in schizophrenia, found significantly larger effect sizes for EE in mood and eating disorders. This study did not specify age ranges covered by the reviewed studies. Thus, attempts to evolve therapies targeted at underlying problems, particularly in younger populations, have been complicated. Linszen et al. ( 1996) found that adding a behavioral family intervention (after Falloon et al., 1984) to an individual psychosocial intervention in patients aged 15 to 26 years made no difference to rates of psychotic relapse in the 15 months following first-episode psychosis. In fact, Linszen's group found a near-significant increase in relapse rate in low-EE families subjected to the intervention, possibly because of the families' perception of the therapy as artificial, critical, or interfering in their reactions to their offspring's illness. However, during that 15-month intervention period, the relapse rate was 15%, which suggests that early intervention improved outcome. The cohort was then referred for care by other agencies and at 5-year follow-up, the low relapse rate had not been maintained. The authors suggest that sustained intervention above and beyond regular services might be required to improve outcome in the longer term. This result, taken in conjunction with the increase in relapse of low-EE families, calls into question the value and possibly the ethics of using this intervention in early psychosis. Asarnow et al. ( 2001) concluded that although available data support the use of family interven-
tions in the treatment of adolescents with schizophrenia, it is not yet possible to determine which model is most effective. There is, however, an encouraging shift from reducing putative risk factors to empowering and channeling this resource. We concur with this viewpoint but would welcome more work into alternative means of monitoring response to family therapy.
The preliminary results from the multicentered National Institute of Mental Health (NIMH) Treatment Strategies Study (Schooler et al., 1997), which compared variable medication strategies in conjunction with a “supportive family management” (psychoeducational workshop for relatives with a monthly support group for 2 years) and “applied family management” (which included the former and an intensive at-home family intervention based on the Falloon et al. behavioral program), suggest that the latter, more intensive program does not yield better results and does not permit the use of lower or intermittent medication regimes. McFarlane et al. ( 1995) conducted a pilot study in which psychoeducation administered in single-family groups was compared with that in multiple-family groups for individuals aged 18 to 45 years. There were lower relapse rates (12.5% at 12 months and 25% at 24 months) in the multiple-family groups (compared to 23.5% and 47.1%, respectively). Both of these programs resulted in lower relapse rates than those achieved in a multiple-family program without a psychoeducational model. In Pilling et al.'s ( 2002) systematic review, family intervention data were also analyzed. The mean age of studied individuals was 31 years, and the mean number of admissions per individual was 2.7. All family interventions (single and multiple) were more effective than the control condition at reducing relapse in the first 12 months of treatment, especially when it consisted of standard care. Only single-family interventions reduced readmission during this time. At 1 to 2 years only, single-family interventions were still reducing relapse, although all treatments were effective at reducing readmission. In-
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terestingly, all family interventions studied had higher rates of treatment compliance to both the family intervention and concurrently prescribed medication. It is important to note, however, that not all the studies included in this review used a supportive individual program as the control condition. Some control conditions actually comprised a family intervention itself, as noted in a response to the review (Bentsen, 2003). The Family to Family Education Program developed by the National Alliance for the Mentally Ill, detailed on their Web site ( http://www.nami.org
), involves a highly structured program conducted by trained family members for 2-to 3-hour sessions over 12 weeks. Participants report decreases in family members' “worry and displeasure” and “subjective burden,” with increased empowerment and knowledge and improved coping strategies. This program is cheap, popular with family members, and can be widely disseminated, thus aiding implementation.
Compliance therapy is a brief, pragmatic intervention in which cognitive behavioral techniques, very closely linked with motivational interviewing, are used to focus on improving treatment adherence. This therapy evolved out of initial work in programs using psychoeducational and behavioral techniques (e.g., Eckman et al., 1992), and its further development was encouraged by the UK National Health Service, which declared noncompliance a research priority. It was tested in a pilot study, modified, and then used by Kemp, Hayward, Applewhaite, Everitt, and David ( 1996) in an RCT of inpatients with psychotic illnesses with follow-up to six months. Eighteen-month follow-up was reported (Kemp, Kirov, Everitt, Hayward, & David, 1998) using an expanded sample. The therapy itself takes place over four to six sessions of 20 to 60 minutes each, approximately biweekly and involves the following:
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Review of the individual's treatment history and his or her views and understanding of the illness and treatment
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Exploration of symptoms and side effects and thus evaluation of pros and cons of treatment
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Despite the fact that the therapy was biased to encourage only positive attitudes to treatment, the therapy also aimed to reframe the use of medication as a decision, freely chosen to enhance quality of life, referred to as an “insurance policy” or “protective layer.” Immediately after the intervention, the compliance therapy had significantly improved insight and compliance, compared to a supportive counseling matched for therapist time, with the same therapists. This effect was maintained at 6-month follow-up with a 23% difference between groups, with those with higher IQ achieving better results. It was not possible to determine whether these gains resulted in increased function or diminished relapse rate. The 18-month follow-up confirmed that compared to the control condition, compliance therapy improved compliance and insight in the intervention group by 19% and improved global functioning, especially as time progressed. It had no overall effect on improving symptomatology or reducing time spent in the hospital over the follow-up period. The positive effects on compliance were not replicated by O'Donnell et al. ( 2003) in an RCT of adult inpatients with schizophrenia. Compliance therapy, administered according to Kemp et al. ( 1996, 1998), conferred no advantage in compliance, symptomatology, or overall function outcomes at 1 year post-therapy, compared to a control condition of equivalent duration with nonspecific counseling. Furthermore, one struggles to see how such a therapy could exert such a persuasive effect in a teenager in the throes of puberty and a battle for independence. Yet again, there is a real need for adaptation of such techniques to adolescent populations, followed by RCTs evaluating their effect.
Although many illicit substances are used by individuals with psychosis, our discussion of such
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substances will be limited to cannabis because it is by far the most common illicit substance used by adolescents.
There is much evidence to suggest that cannabis consumption among those already schizophrenic has a detrimental effect. The strength of this effect is not yet certain, however (Johns, 2001). Unfortunately, there is even less evidence concerning what can be done about it.
Zammit, Allebeck, Andreasson, Lunberg, & Lewis ( 2002) conducted a further analysis of the Swedish conscript data for 1969–1970 (>97% of the country's male population aged 18 to 20). They separated the cohort into those with psychosis onset < 5 years and those with onset > 5 years after data collection to rule out the possibility of prodrome at the time of conscription. They found a significant dose-related relationship between cannabis and increased risk of developing schizophrenia, strongest in those who had onset of psychosis within 5 years of conscription and present in both those who used cannabis alone and cannabis with other drugs. Similar results were obtained when only those with onset >5 years were analyzed. This study could not determine, however, whether cannabis use in adolescence was a result of preexisting psychotic symptomatology or a cause in itself for psychosis. This issue was addressed by the Dunedin study (Arsenault, Cannon, Witton, & Murray, 2003), a longitudinal, prospective study that assessed preexisting psychotic symptoms at age 11, drug use at 15 and 18 years of age, and psychiatric outcome measures at 26 years. This study showed that adolescents who used cannabis at 15 and 18 years of age had significantly more symptoms of schizophrenia than controls at 26 years of age. Furthermore, these results remained significant when quasi-psychotic symptoms at 11 years were controlled for. Use of cannabis at 15 years increased adult risk of schizophreniform disorder by a factor of 4, although these results did
not remain significant when psychotic symptoms at age 11 were controlled for. Thus cannabis use, especially earlier in life, increases the risk of schizophrenia symptoms. This effect is not explained by use secondary to psychosis and this effect appears to be specific to cannabis use. Although cannabis is not thought to be necessary or sufficient to cause the onset of psychosis, it is estimated that 8% of schizophrenia cases in New Zealand could be prevented by the cessation of cannabis use in the general population (Arsenault et al., 2003). Therefore, in addition to discouraging the legalization and supply of cannabis, mental health initiatives should educate adolescents on the previously unrecognized risks of cannabis misuse. Such initiatives could occur concurrently with the campaigns already implemented by early-intervention services.
Studies attempting to assess efficacy of psychological treatments have been hampered by a multitude of methodological problems. Often very different versions of a treatment model are described as one and the same. They are often applied to heterogenous populations (e.g., different ages or illness stages) and compared with a control condition unmatched for therapist time and attention. Debate also continues about the best way to assess the outcome of such interventions. Bellack and Brown ( 2001) feel that judging psychosocial treatments on the same outcome measures as pharmacological intervention might not be appropriate. Rather than evaluating therapies on whether they reduce symptoms, induce remission, or prevent relapse, they recommend focusing on their effect in reducing impairments in social role functioning and improving overall quality of life and treatment adherence. So they recommend rehabilitation rather than treatment, taking into account the confounding effect of cognitive deficits and the need for newly learned skills to generalize to real life in the community. They liken psychosocial therapies to the use of Braille in visually impaired individuals.
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Outcome studies in schizophrenia tend to focus on categorical measures, such as hospital admission, and on professional observations of relapse, symptomatology, or cognitive impairment. Very few assess psychosocial outcome or quality of life, especially as rated by users of services and their caregivers. Such measures of outcome are particularly important for adolescent populations. Lay, Blanz, Hartmann, and Schmidt ( 2000) conducted a 12-year follow-up study of 96 consecutively admitted individuals with schizophrenia (aged 11 to 17). Of the 68% reassessed at 12 years, 66% had serious social disability, which was predicted by severity of positive symptoms in the early stages and by admissions numbering more than two; 75% were financially dependent. Jarbin, Yngve, & Von Knorring ( 2003) conducted a 10-year follow-up of adolescents (age <19 years) who were diagnosed with first-episode early-onset psychosis in the 1980s and early 1990s; 79% of those with early-onset schizophrenia spectrum disorders suffered a chronic course with poor outcome. The collaborative and empowering nature of many of the psychotherapeutic options, though incompletely evaluated and not always available, switches our focus from such sobering outcomes and inflicted choices to a more patient-driven framework. It is encouraging to see that the quest for alternatives and adjuncts to pharmacological treatments has been stepped up and that attempts are being made to improve the methodological quality of their evaluation. However, a clinician faced with an adolescent newly diagnosed as having schizophrenia would find it extremely difficult to tease out which interventions might be helpful and of these, which might be a cost-effective use of available resources. Adolescents continue, as before, to fall between child and adult services in terms of service provision (National Institute of Clinical Excellence [NICE], 2002). Perhaps mental health initiatives, building on the continuing outcomes of early-intervention programs, can shape devoted services to be targeted at problems that beset adolescents with schizophrenia by virtue of their developmental stage. Such initiatives need to be designed specifically for young minds and hearts.
PHARMACOLOGICAL MANAGEMENT OF PRODROMAL AND FIRST-EPISODE SCHIZOPHRENIA AND RELATED NONAFFECTIVE PSYCHOSES
As noted in Chapter 5, schizophrenia is a severe mental illness characterized by abnormalities of thought and perception that affects about 1% of the population worldwide over the course of a lifetime (Bourdon, Rae, Locke, Narrow, & Regier, 1992; Eaton, 1985; Hare, 1987; Helgason, 1964; Jablensky, 1986; Kramer, 1969; Robins et al., 1984). The optimal time to treat this illness with the currently available therapeutic agents is as early in the course and as close to the onset as possible. Often the onset of the illness precedes the manifestation of symptoms diagnosable at the syndromal level by a considerable period of time. As also summarized in Chapter 5, the onset of the formal symptoms of schizophrenia is generally preceded by a prodromal phase. So-called prodromal symptoms and behaviors (i.e., those that herald the approaching onset of the illness) include attenuated positive symptoms (e.g., illusions, ideas of reference, magical thinking, superstitiousness), mood symptoms (e.g., anxiety, dysphoria, irritability), cognitive symptoms (e.g., distractibility, concentration difficulties), social withdrawal, or obsessive behaviors, to name a few (McGlashan, 1996; Yung & McGorry, 1996). Because many of these prodromal phenomena extensively overlap with the range of mental experiences and behaviors of persons in the ages of risk who do not subsequently develop schizophrenia, prodromal symptoms cannot be considered diagnostic. It is precisely their nonspecificity and lack of high predictive validity that limits their utility for the purposes of early intervention (Gottesman & Erlenmeyer-Kimling, 2001; Schaffner & McGorry, 2001). The development of frank psychotic symptoms marks the formal onset of first-episode schizophrenia, although this is usually not diagnosed for some time, until the patient seeks or is brought to medical attention. Indeed, the duration of psychotic symptoms prior to diagnosis and treatment averages about 1 year, and if time since prodromal symptoms first appeared is considered, the average duration is about 3 years
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doi:10.1093/9780195173642.003.0007
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