An analysis of 105 female-perpetrated mass murders.

Most research on mass murderers to date has focused on perpetrators of male sex, while research on perpetrators of female sex has been relegated to case reports and series. We aimed to more fully examine the phenomenon of female-perpetrated mass murder. We analyzed 1715 worldwide incidents of personal-cause mass murder from 1900 to 2019, identifying 105 (6%) events perpetrated by females.

Hepatitis C and Cigarette Smoking Behavior: Themes From Focus Groups.

Introduction: People with chronic hepatitis C virus (HCV; PWHC) use cigarettes at a much higher prevalence than other individuals, and smoking can exacerbate the harms specifically related to HCV (eg, hepatocellular carcinoma). Little is known about factors related to cigarette use among PWHC.

Aims And Methods: This study examined focus group data to explore beliefs and behaviors related to cigarette use among PWHC.

An Analysis of Motivating Factors in 1,725 Worldwide Cases of Mass Murder Between 1900-2019.

Mass murder, particularly mass shootings, constitutes a major, growing public health concern. Specific motivations for these acts are not well understood, often overattributed to severe mental illness. Identifying diverse factors motivating mass murders may facilitate prevention.

Victimology of Mass Shootings and Mass Murders Not Involving Firearms.

Most research to date has focused on perpetrators of mass murder incidents. Hence, there is little information on victims. We examined 973 mass murders that occurred in the United States between 1900 and 2019 resulting in 5,273 total fatalities and 4,498 nonfatal injuries for a total of 9,771 victims (on average 10 victims per incident).

Psychotic symptoms in mass shootings . mass murders not involving firearms: findings from the Columbia mass murder database.

Background: Mass shootings account for a small fraction of annual worldwide murders, yet disproportionately affect society and influence policy. Evidence suggesting a link between mass shootings and severe mental illness (i.e.

Thematic content of obsessive and compulsive symptoms and conversion to psychosis in a clinical high-risk cohort.

Aim: We sought to explore the complex phenomenological overlap between obsessive and compulsive symptoms (OCS), and attenuated positive symptoms among 156 young people at clinical high-risk (CHR) for psychosis.

Methods: In order to explore the hypothesis that OCS of an implausible nature might optimally predict future transition to syndromal psychosis, ideas associated with obsessive and compulsive experiences elicited by clinical measures were thematically categorized as "plausible" or "implausible."

Results: While OCS were found to be common in our CHR sample, we did not find that implausible OCS themes were predictive of conversion.

Temporal relationship between onset of positive and negative symptoms in the course of attenuated psychotic illness.

Research in individuals at clinical high-risk (CHR) for psychosis has traditionally focused on the relationship between the severity of positive and negative symptoms and development of syndromal psychosis. In this study, we examined the temporal order of emergence of positive and negative symptoms in 116 CHR individuals who met criteria for the Attenuated Positive Symptom Syndrome defined in the Structured Interview for Psychosis-Risk Syndromes (SIPS). We found that positive symptoms emerged at a significantly younger age than negative symptoms with no significant differences between converters and non-converters.