Am J Psychiatry
September 2025
Objective: The study aim was to identify ethnoracial disparities in the prevalence of schizophrenia spectrum disorders (SSDs) and positive psychotic symptoms in the United States and examine the role of social neighborhood inequities.
Methods: Participants in the Mental and Substance Use Disorders Prevalence Study, a national household sample of nonelderly adults (N=4,764), were assessed by clinicians with the Structured Clinical Interview for DSM-5 (SCID-5) for SSDs (past year and lifetime), including schizophrenia, schizoaffective disorder, and schizophreniform disorder, and for psychotic symptoms. Weighted logistic regression models estimated ethnoracial differences in the prevalence of SSDs and psychotic symptoms in unadjusted models, age- and sex-adjusted models, and models further adjusted for a neighborhood Social Vulnerability Metric (SVM) score, a composite index of five social determinants of health domains.
Previous research indicates that gastrointestinal discomfort from milk consumption may be attributable to A1 β-casein, rather than lactose intolerance alone. A2 milk (free of A1 β-casein) consumption may result in fewer symptoms compared to conventional milk containing both A1/A2 β-casein. In this five-week, double-blind, double-crossover study, we assessed the physiological responses to doses escalating in volume of lactose-free conventional milk (Lactaid), A2 milk, and lactose-free A2 milk in fluid milk-avoiding participants.
View Article and Find Full Text PDFWe recently reported that resistance-trained (T, = 10) and untrained (UT, = 11) young adults experience vastus lateralis (VL) muscle atrophy following 2 wk of disuse, and 8 wk of recovery resistance training (RT) promotes VL hypertrophy in both participant cohorts. Skeletal muscle angiogenesis is appreciated for supporting skeletal muscle hypertrophy, but its activity following disuse-induced atrophy in humans is largely unexplored in the context of RT. Thus, we sought to determine whether these outcomes were affected.
View Article and Find Full Text PDFBackground: Racially and ethnically minoritized emerging adults in the United States have a higher prevalence of psychotic experiences when compared to their White peers. Racism gives rise to social stressors, including ethno-racial discrimination, which can increase the risk for psychotic experiences. Racism is ever-shapeshifting into new forms of racism, including online racism, yet little research has examined its associations with psychotic experiences.
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