Objective Several reports suggest that cannabis use is associated with an earlier age at onset of psychosis, though not all studies have operationalized cannabis use as occurring prior to onset of symptoms. This study addressed whether pre-onset cannabis use (and alcohol and tobacco use) is associated with an earlier age at onset of prodromal and psychotic symptoms. Additionally, effects of the progression of frequency of use were examined through time-dependent covariates in survival analyses. Method First-episode patients (n=109) hospitalized in two public-sector inpatient psychiatric units underwent in-depth cross-sectional/retrospective assessments. Prior substance use and ages at onset of prodromal and psychotic symptoms were determined using standardized methods. Cox regression modeling was conducted. Results Whereas classifying participants according to maximum frequency of use prior to onset (none, ever, weekly, or daily) revealed no significant effects of cannabis or tobacco use on risk of onset, analysis of change in frequency of use prior to onset indicated that progression to daily cannabis and tobacco use was associated with increased risk of onset of psychotic symptoms. Similar or even stronger effects were observed when onset of illness/prodromal symptoms was the outcome. A gender by daily cannabis use interaction was observed—progression to daily use resulted in a much larger increased relative risk of onset of psychosis in females than males. Conclusions Pre-onset cannabis use may hasten the onset of psychotic as well as prodromal symptoms. Age at onset is a key prognostic factor in schizophrenia, and discovering modifiable predictors of age at onset is crucial.

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Despite rising international needs for mental health practitioners, the mental health nursing workforce is underutilized. This is in part due to limited understandings of their roles, identities, and capabilities. This paper aimed to collate and synthesize published research on the clinical roles of mental health nurses in order to systematically clarify their professional identity and potential. We searched for eligible studies, published between 2001 and 2021, in five electronic databases. Abstracts of retrieved studies were independently screened against exclusion and inclusion criteria (primarily that studies reported on the outcomes associated with mental health nursing roles). Decisions of whether to include studies were through researcher consensus guided by the criteria. The search yielded 324 records, of which 47 were included. Retained papers primarily focused on three themes related to mental health nursing clinical roles and capabilities. Technical roles included those associated with psychotherapy, consumer safety, and diagnosis. Non‐technical roles and capabilities were also described. These included emotional intelligence, advanced communication, and reduction of power differentials. Thirdly, the retained papers reported the generative contexts that influenced clinical roles. These included prolonged proximity with consumers with tensions between therapeutic and custodial roles. The results of this scoping review suggest the mental health nurses (MHNs) have a wide scope of technical skills which they employ in clinical practice. These roles are informed by a distinctive cluster of non‐technical capabilities to promote the well‐being of service users. They are an adaptable and underutilized component of the mental health workforce in a context of escalating unmet needs for expert mental health care.

Objective The duration of untreated psychosis is associated with poor outcomes in multiple domains in the early course of nonaffective psychotic disorders, although relatively little is known about determinants of this critical period, particularly health services–level determinants. This study examined three hypothesized predictors of duration of untreated psychosis (lack of insurance, financial problems, and broader barriers) among urban, socioeconomically disadvantaged African Americans, while controlling for the effects of three patient-level predictors (mode of onset of psychosis, living with family versus alone or with others before hospitalization, and living above versus below the federally defined poverty level). Methods Analyses included data from 42 patient–family member dyads from a larger sample of 109 patients with a first episode of nonaffective psychosis. The duration of untreated psychosis and all other variables were measured in a rigorous, standardized fashion in a study designed specifically to examine determinants of treatment delay. Survival analyses and Cox regression assessed the effects of the independent predictors on time from onset of psychosis to hospital admission for initial evaluation and treatment. Results The median duration of untreated psychosis was 24.5 weeks. When the analyses controlled for the three patient-level covariates, patients without health insurance, with financial problems, or with barriers to seeking help had a significantly longer duration of untreated psychosis. Conclusions Health services–related factors, such as lack of insurance, are predictive of longer treatment delay. Efforts to eliminate uninsurance and underinsurance, as well as minimize barriers to treatment, would be beneficial for improving the prognosis of young patients with emerging nonaffective psychotic disorders. (Psychiatric Services 60:1489–1494, 2009)

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