Featured Research

from universities, journals, and other organizations

Substance Abuse Factor In Higher Risk Of Violent Crime By Persons With Schizophrenia

Date:
May 22, 2009
Source:
JAMA and Archives Journals
Summary:
The increased risk of persons with schizophrenia committing violent crime may be largely mediated by co-existing substance abuse problems, according to a new study.

The increased risk of persons with schizophrenia committing violent crime may be largely mediated by co-existing substance abuse problems, according to a new study.

Related Articles


Many studies have reported on the association between major mental disorder and violence, including some that specifically have examined the relationship with schizophrenia. "These reports typically find that schizophrenia is related to a 4- to 6-fold increased risk of violent behavior, which has led to the view that schizophrenia and other major mental disorders are preventable causes of violence and violent crime," the authors write. They add that considerable uncertainty exists as to what is the cause of this elevated risk. Some studies have indicated that substance abuse may play a role.

Seena Fazel, M.D., of the University of Oxford, Warneford Hospital, Oxford, England, and colleagues examined the relationship of schizophrenia with violent crime and the possible role of substance abuse. The study included data from nationwide Swedish registers of hospital admissions and criminal convictions from 1973-2006. Risk of violent crime in patients after diagnosis of schizophrenia (n = 8,003) was compared with that among general population controls (n = 80,025). Potential confounders (factors that can influence outcomes; age, sex, income, and marital and immigrant status) and mediators (intervening factors such as substance abuse) were measured at the beginning of the study. To study familial confounding, the researchers also investigated risk of violence among unaffected siblings (n = 8,123) of patients with schizophrenia.

The researchers found that among patients with schizophrenia, 1,504 (13.2 percent) had at least 1 violent offense compared with 4,276 (5.3 percent) of general population controls (adjusted odds ratio, 2.0). The rate of violent crime in individuals diagnosed as having schizophrenia and substance abuse (27.6 percent) was significantly higher than in those without substance abuse (8.5 percent), which resulted in adjusted odds ratios of 4.4 for violent crime in schizophrenia with substance abuse and 1.2 in schizophrenia without substance abuse.

The risk increase among those with substance abuse was significantly less pronounced when unaffected siblings were used as controls (28.3 percent of those with schizophrenia had a violent offense compared with 17.9 percent of their unaffected siblings), suggesting significant familial (genetic or early environmental) confounding of the association between schizophrenia and violence.

"We demonstrate that the risk of violent crime in schizophrenia in patients without comorbid substance abuse is only slightly increased. In contrast, the risk is substantially increased among patients with comorbidity and suggests that current practice for violence risk assessment and management in schizophrenia may need review," the authors conclude.


Story Source:

The above story is based on materials provided by JAMA and Archives Journals. Note: Materials may be edited for content and length.


Journal Reference:

  1. Fazel et al. Schizophrenia, Substance Abuse, and Violent Crime. JAMA The Journal of the American Medical Association, 2009; 301 (19): 2016 DOI: 10.1001/jama.2009.675

Cite This Page:

JAMA and Archives Journals. "Substance Abuse Factor In Higher Risk Of Violent Crime By Persons With Schizophrenia." ScienceDaily. ScienceDaily, 22 May 2009. <www.sciencedaily.com/releases/2009/05/090519172105.htm>.
JAMA and Archives Journals. (2009, May 22). Substance Abuse Factor In Higher Risk Of Violent Crime By Persons With Schizophrenia. ScienceDaily. Retrieved January 25, 2015 from www.sciencedaily.com/releases/2009/05/090519172105.htm
JAMA and Archives Journals. "Substance Abuse Factor In Higher Risk Of Violent Crime By Persons With Schizophrenia." ScienceDaily. www.sciencedaily.com/releases/2009/05/090519172105.htm (accessed January 25, 2015).

Share This


More From ScienceDaily



More Mind & Brain News

Sunday, January 25, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Smart Wristband to Shock Away Bad Habits

Smart Wristband to Shock Away Bad Habits

Reuters - Innovations Video Online (Jan. 23, 2015) — A Boston start-up is developing a wristband they say will help users break bad habits by jolting them with an electric shock. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
Amazing Technology Allows Blind Mother to See Her Newborn Son

Amazing Technology Allows Blind Mother to See Her Newborn Son

RightThisMinute (Jan. 23, 2015) — Not only is Kathy seeing her newborn son for the first time, but this is actually the first time she has ever seen a baby. Kathy and her sister, Yvonne, have been legally blind since childhood, but thanks to an amazing new technology, eSight glasses, which gives those who are legally blind the ability to see, she got the chance to see the birth of her son. It&apos;s an incredible moment and an even better story. Video provided by RightThisMinute
Powered by NewsLook.com
One Dose, Then Surgery to Test Tumor Drugs Fast

One Dose, Then Surgery to Test Tumor Drugs Fast

AP (Jan. 23, 2015) — A Phoenix hospital is experimenting with a faster way to test much needed medications for deadly brain tumors. Patients get a single dose of a potential drug, and hours later have their tumor removed to see if the drug had any affect. (Jan. 23) Video provided by AP
Powered by NewsLook.com
The Best Bedtime Rituals For a Good Night's Sleep

The Best Bedtime Rituals For a Good Night's Sleep

Buzz60 (Jan. 22, 2015) — What you do before bed can effect how well you sleep. TC Newman (@PurpleTCNewman) has bedtime rituals to induce the best night&apos;s sleep. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins