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Minor Psychiatric Disorders Don’t Predict GERD Ditching Chemo Appears Viable in Frontline Follicular Lymphoma Liver Cancer Screening in At-Risk Patients Underused Investigational Ebola Tx OK’d; Fido Flu; HIV Race Gap Cannabis use preceded onset of psychosis symptoms in teens more often than the reverse, according to researchers analyzing data from a longitudinal study conducted in Quebec. A total of 3,966 adolescents volunteered to participate annually in an online survey in which they reported their cannabis use in the past year (on a 6-point scale ranging from “never” to “every day”) and any psychosis symptoms they experienced as per the Adolescent Psychotic-Like Symptoms Screener. With the survey data, a statistical model was created showing the relationship between marijuana use and psychosis symptoms over ages 13-16 (χ2=48.22). Once the model incorporated time-lagged associations between earlier cannabis use and psychosis symptom onset 12 months later, the model acquired a better fit (χ2=26.07, P=0.001), according to Patricia Conrod, PhD, of the University of Montreal, CHU Sainte-Justine Research Center, and colleagues, reporting online in a research letter in JAMA Psychiatry. “This analysis demonstrates a predominant association at the individual level of cannabis use frequency with increased psychosis symptoms, and not the opposite, in the general population at a developmental stage when both phenomena have their onset. “[T]hese results emphasize the need for targeted cannabis use prevention as jurisdictions revise their cannabis regulatory policies,” the researchers suggested. Psychosis Tends to Follow Cannabis Use, Not Vice Versa

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