Long-term outcome of early-onset compared to adult-onset schizophrenia: A nationwide Danish register study

Identification and treatment of individuals with childhood-onset and early-onset schizophrenia

Approximately 8 % of patients with schizophrenia are diagnosed before age 18, and 18 % experience their first symptoms before age 18. This narrative review explores the management of patients with early-onset schizophrenia (EOS) and childhood-onset schizophrenia (COS) from diagnosis to their transition to adult care settings. Early diagnosis of schizophrenia in children and adolescents is essential for improving outcomes, but delays are common due to overlapping of symptoms with developmental phenomena and other psychiatric conditions, including substance use, and lack of clinicians' awareness. Once diagnosed, antipsychotic treatment is key, with specific second-generation agents generally being preferred due to better tolerability and their broader efficacy evidence-base in youth. Dosing should be carefully individualized, considering age-related differences in drug metabolism and side effect liability. Clinicians must be vigilant in detecting early non-response and consider switching or dose escalation when appropriate. Since early age of illness onset is a consistent risk factor for treatment-resistant schizophrenia (TRS), clinicians need to be competent in diagnosing TRS and using clozapine. Since COS and EOS are associated with cognitive deficits and impaired functioning, psychosocial interventions should be considered to improve overall functioning and quality of life. Good long-term outcomes depend on continuous treatment engagement, and successful transitioning from pediatric to adult care requires careful planning, early preparation, and collaboration between pediatric and adult clinicians. Targeting functional outcomes and quality of life in addition to symptom remission can improve overall patient well-being. Comprehensive evaluations, age-specific assessments, and targeted interventions are needed to address the unique challenges of EOS and COS.

Cross-sectional associations between adaptive functioning and social cognitive and neurocognitive functions in adolescents with first-episode, early-onset schizophrenia spectrum disorders

BACKGROUND

Few studies have explored associations between adaptive functioning and cognition in adolescents with early-onset schizophrenia spectrum disorders (EOS).

METHODS

Adaptive functioning, cognition, positive, negative, and general symptoms were characterized in adolescents with EOS and healthy controls. A modified scale of negative, respectively, general symptoms was used. Bivariate analyses identified correlates of adaptive functioning to be included in multivariate analysis.

RESULTS

Adolescents with EOS showed significant impairments of social- and neurocognitive functions (-0.86 < Cohen´s ds < -0.58) and adaptive functioning (Cohen´s d = -2.23). Visual memory, verbal working memory, processing speed, reaction time, social cognition, and modified negative and general symptoms correlated significantly with adaptive functioning. The multiple regression analysis revealed only verbal working memory as uniquely associated with adaptive functioning (explaining 22.7 % of its variance). Verbal working memory also associated significantly with adaptive functioning in the context of the nonsignificant modified negative and the significant modified general symptoms dimension.

CONCLUSIONS

Adolescents with first-episode EOS had large impairments in adaptive functioning and moderate to large cognitive deficits. Verbal working memory was an important associate to concurrent adaptive functioning and may be a treatment target for trials to improve cognitive and adaptive functioning in adolescents with EOS.

Effect of onset age on the long-term outcome of early-onset psychoses and other mental disorders: a register-based Northern Finland Birth Cohort 1986 study

Psychiatric illnesses can affect the social transitions of adolescence and young adulthood, such as completing education and entering working life and relationships. However, associations between earlier onset age and long-term outcomes among those with early-onset psychoses (EOP) are unclear, as are the long-term outcomes of EOP compared to non-psychotic disorders. We used national register data of the Northern Finland Birth Cohort 1986 to detect persons with EOP and other early-onset psychiatric disorders. The long-term clinical and work-family outcomes of persons with onset age before 18 years (n = 41 psychoses, n = 495 non-psychoses) or between 18-22 years (n = 61 psychoses, n = 377 non-psychoses) were compared. Individuals with the onset of psychosis between 18-22 years had significantly more unfavourable long-term outcomes when compared to those with psychosis onset before 18 years. Persons with psychosis onset before the age of 18 years had similar outcomes to those with non-psychotic psychiatric disorder onset before 18 years regarding educational level, marital status, having children, and substance use disorders. Individuals with EOP were more often on a disability pension compared to those with other early-onset mental disorders. Adjusting for sex, educational level and substance use only slightly diluted these results. Unexpectedly, later onset age of EOP was associated with worse outcomes. Those with psychosis onset between 18-22 years of age are in a critical period, which underlines the importance of investing on interventions in this age group. Further studies on the effect of the onset age on later outcomes in EOP are needed.

A Sex-Dependent Association Between Doxycycline Use and Development of Schizophrenia

BACKGROUND

Doxycycline and minocycline are brain-penetrant tetracycline antibiotics, which recently gained interest because of their immunomodulatory and neuroprotective properties. Observational studies have suggested that exposure to these drugs may decrease the risk to develop schizophrenia, but results are inconsistent. The aim of this study was to investigate the potential association between doxycycline use and later onset of schizophrenia.

DESIGN

We used data from 1 647 298 individuals born between 1980 and 2006 available through Danish population registers. 79 078 of those individuals were exposed to doxycycline, defined as redemption of at least 1 prescription. Survival analysis models stratified for sex with time-varying covariates were constructed to assess incidence rate ratios (IRRs) for schizophrenia (ICD-10 code F20.xx), with adjustment for age, calendar year, parental psychiatric status, and educational level.

RESULTS

In the non-stratified analysis, there was no association between doxycycline exposure and schizophrenia risk. However, men who redeemed doxycycline had a significantly lower incidence rate for schizophrenia onset compared to men that did not (IRR 0.70; 95% CI 0.57-0.86). By contrast, women had a significantly higher incidence rate for schizophrenia onset, compared to women that did not redeem doxycycline prescriptions (IRR 1.23; 95% CI 1.08, 1.40). The effects were not found for other tetracycline antibiotics (IRR 1.00; 95% CI 0.91, 1.09).

CONCLUSIONS

Doxycycline exposure is associated with a sex-dependent effect on schizophrenia risk. The next steps are replication of the results in independent well-characterized population cohorts, as well as preclinical studies to investigate sex-specific effects of doxycycline on biological mechanisms implicated in schizophrenia.

Early Antipsychotic Nonresponse as a Predictor of Nonresponse and Nonremission in Adolescents With Psychosis Treated With Aripiprazole or Quetiapine: Results From the TEA Trial

OBJECTIVE

To evaluate 1) whether early nonresponse to antipsychotics predicts nonresponse and nonremission, 2) patient and illness characteristics as outcome predictors, and 3) response prediction of 30-item Positive and Negative Syndrome Scale (PANSS-30) compared with 6-item PANSS (PANSS-6) and Clinical Global Impressions-Improvement Scale (CGI-I) in youths with first-episode psychosis.

METHOD

Post hoc analysis from a 12-week, double-blinded, randomized trial of aripiprazole vs extended-release quetiapine in adolescents (age 12-17 years) with first-episode psychosis was performed. Early nonresponse (week 2 or week 4) was defined as <20% symptom reduction (PANSS-30) (or <20% symptom reduction [PANSS-6] or CGI-I score 4-7 [less than "minimally improved"]). Nonresponse (week 12) was defined as <50% symptom reduction (PANSS-30). Nonremission (week 12) was defined as a score of >3 on 8 selected PANSS-items. Positive/negative predictive values (PPV/NPV) and receiver operating characteristics, binary logistic regression models, and PPV/NPV using PANSS-6 and CGI-I were analyzed.

RESULTS

Of 113 randomized patients, 84 were included in post hoc analysis (mean [SD] age = 15.7 [1.3] years; 28.6% male). The 12-week symptom decrease was 31.9% [27.9%], most pronounced within the first 2 weeks (61.1% of total PANSS reduction). Response (27.4%) and remission (22.6%) rates were low. Results indicated that early nonresponse reliably predicted 12-week nonresponse (PPV: week 2, 82.2%; week 4, 90.0%) and nonremission (PPV: week 2, 80.0%; week 4, 90.0%); early nonresponse at week 4 was a statistically significant baseline predictor for 12-week nonresponse; and PANSS-6 had similar predictive significance as PANSS-30. However, outcomes were heterogeneous using CGI-I.

CONCLUSION

In youths with first-episode psychosis showing early nonresponse to aripiprazole or extended-release quetiapine, switching antipsychotic drug should be considered. PANSS-6 is a feasible and clinically relevant alternative to PANSS-30 to predict 12-week nonresponse/nonremission.

CLINICAL TRIAL REGISTRATION INFORMATION

Tolerance and Effect of Antipsychotics in Children and Adolescents With Psychosis; https://www.

CLINICALTRIALS

gov/; NCT01119014.

Short-term Efficacy and Safety of Lurasidone Versus Placebo in Antipsychotic-Naïve vs. Previously Treated Adolescents with an Acute Exacerbation of Schizophrenia

Background

To evaluate the efficacy of short-term lurasidone in antipsychotic treatment-naïve (TN) adolescents with schizophrenia versus those treated previously (TP) with antipsychotics.

Methods

Patients aged 13–17 with schizophrenia, and a Positive and Negative Symptom Scale (PANSS) score ≥ 70 and < 120, were randomized to 6 weeks of double-blind treatment with lurasidone (40 or 80 mg/day) or placebo. In a post-hoc, pooled-dose analysis, efficacy was evaluated for TN (criteria: never received antipsychotic treatment) versus TP at the time of the study. Treatment response criteria: ≥20% reduction in PANSS total score.

Results

Altogether, 57 TN and 269 TP patients enrolled in the 6-week DB study. Mean endpoint change in PANSS total score was significantly greater for lurasidone versus placebo in both the TN group (−25.0 vs. -14.4; p < 0.02; effect size = 0.75), and in the TP group (−17.3 vs. -10.0; p < 0.001; effect size = 0.45); and responder rates were higher for lurasidone versus placebo in both the TN group 84.6% versus 38.9%; number needed to treat [NNT] = 3 and in the TP group (60% vs. 42%; NNT = 6). Rates of treatment-emergent adverse events, and mean changes in body weight and metabolic parameters were similar for the TN and TP groups.

Conclusions

In a 6-week, placebo-controlled trial, lurasidone demonstrated significant efficacy in adolescents with schizophrenia regardless of previous antipsychotic therapy status; however, the effect size was notably larger in the TN patient group. In both the TN and TP groups, minimal effects were noted on weight, metabolic parameters, or prolactin.

Comparison of clinical characteristics and treatment efficacy in childhood-onset schizophrenia and adolescent-onset schizophrenia in mainland China: A retrospective study

AIM

The comparative study of childhood-onset schizophrenia (COS) and adolescent-onset schizophrenia (AOS) is scarce. This study aimed to examine the differences in clinical presentations and treatment efficacy between COS and AOS and further analyse the factors affecting the efficacy of early-onset schizophrenia (EOS).

METHODS

A total of 582 electronic medical records of inpatients with EOS (216 COS and 366 AOS inpatients) between 2012 and 2019 were retrospectively analysed. The positive and negative syndrome scale (PANSS) was used to assess psychotic symptoms. Logistic regression analysis was performed to analyse the predictors of efficacy.

RESULTS

The mean age of onset of EOS was 12.87 ± 2.19 years. The importance of better diagnosing COS appeared in a longer illness course, more frequently insidious onset, less frequent delusions, more severe negative symptoms and bizarre behaviours than AOS. Besides, COS had more frequent visual hallucinations and impulsive behaviours than AOS. After hospitalization, the improvement rate of psychotic symptoms in COS and AOS were 38.3% and 47.8%, respectively. The difference of efficacy between the two groups was statistically significant. Days of hospitalization, age of onset, presence of flat affect, PANSS total and negative score at admission were predictors of treatment efficacy in EOS individuals.

CONCLUSIONS

COS inpatients suffer more obvious negative symptoms, bizarre behaviours, visual hallucinations and impulsive behaviours and worse efficacy than AOS inpatients. The severity of negative symptoms and age of onset seem the most noteworthy predictors of efficacy. These findings highlight the importance of early detection and early intervention.

Efficacy and safety of lurasidone in adolescents and young adults with schizophrenia: A pooled post hoc analysis of double-blind, placebo-controlled 6-week studies

Background

The aim of this pooled analysis was to evaluate the efficacy and safety of lurasidone in the treatment of an acute exacerbation of schizophrenia in adolescents and young adults.

Methods

The six pooled studies in this analysis used similar study designs and outcome measures. Patients (aged 13–25 years) were randomized to 6 weeks of double-blind, placebo-controlled treatment with lurasidone in fixed doses of 40, 80, 120, or 160 mg. The primary efficacy endpoint was Week 6 change in the Positive and Negative Syndrome Scale (PANSS) total score; secondary efficacy endpoints included Week 6 change in the Clinical Global Impression–Severity scale.

Results

The safety population consisted of 537 patients (mean age: 18.1 years); 82.6% of patients completed the studies. Treatment with lurasidone was significantly better than placebo at all doses (p < 0.001) for change in the PANSS total score at Week 6. Placebo-adjusted PANSS scores ranged from −9.4 to −16.1 (effect sizes: 0.53–0.90), with effect sizes increasing at higher doses. For lurasidone (combined doses), three adverse events occurred with a frequency of ≥5% (nausea: 13.5%; somnolence: 12.1%; akathisia: 10.1%). At last observation carried forward (LOCF)-endpoint weight gain of ≥7% was similar for lurasidone versus placebo (3.6 vs. 4.7%). Minimal median changes were observed at endpoint in cholesterol, −2.0 mg/dL; triglycerides, 0.0 mg/dL; and glucose, 0.0 mg/dL.

Conclusions

In adolescents and young adults with schizophrenia, treatment with lurasidone in doses of 40–160 mg/d was a safe, well-tolerated, and effective treatment. Short-term treatment with lurasidone was associated with minimal effects on weight and metabolic parameters.