HOME >> MEDICINE >> NEWS
Marijuanas impact on intelligence

Peter Fried and colleagues report that light and former use of marijuana does not appear to have a long-term effect on intelligence, while heavy use appears to be detrimental.

Fried and colleagues followed 70 subjects in the Ottawa Prenatal Prospective Study, and compared intelligence quotient (IQ) scores of subjects at 912 years of age (before initiation of marijuana use) with their scores at 17-20 years. The authors grouped subjects as nonusers (n= 37), light users (less than 5 joints per week, n=9), former users of marijuana (no marijuana use in at least 3 months, n=9) or heavy users.

The authors found that among heavy users (more than 5 joints per week, n=15) IQ scores decreased by 4.1 points on average, while gains in IQ scores were seen among light users (mean 5.8 points), former users (mean 3.5 points), and nonusers (mean 2.6).

The authors state that while there was a significant decline in IQ scores, the scores of the subjects at a mean of 109.1 were still above average at the young adult assessment (mean 105.1). They add that if preteen IQ had not been assessed, the subjects would have appeared to be functioning normally. The authors suggest further investigation into the cognitive consequences of both current and previous marijuana use, particularly since the popularity of the drug has been increasing over the last 4 years.


'"/>

Contact: Dr. Peter Fried
peter_fried@carleton.ca
613-520-2676
Canadian Medical Association Journal
1-Apr-2002


Page: 1

Related medicine news :

1. Cockroach allergens have greatest impact on childhood asthma in many US cities
2. The impact of cruciate ligament rupture on osteoarthritis of the knee
3. Folic acid recommendations have had little impact on birth defects
4. Flu vaccination impact on elderly deaths may be over-estimated
5. Study suggests obesity has lesser financial impact on African-Americans
6. Study models impact of anthrax vaccine
7. Study examines impact of two-year screening interval for breast cancer
8. The impact of body weight on the progression of knee osteoarthritis
9. Study clarifies impact of age on safety of warfarin treatment for atrial fibrillation
10. Exercise for special populations, sensory research, factors impacting rehabilitation top issues
11. PITT, OHSU: When early life stress occurs determines its impact later

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/28/2020)... ... June 26, 2020 , ... ... Inland Empire’s premier residential addiction treatment center, proudly announces that it has reopened ... special preparation for recovery in a world affected by Covid-19. , When social-distancing ...
(Date:6/28/2020)... MONTREAL (PRWEB) , ... June 27, 2020 , ... The ... cashmere folds of hundreds of rolls of toilet paper. Yet, it was the first ... hoarding seems sensible in theory. The more you have stockpiled, the less need to ...
(Date:6/28/2020)... , ... June 28, 2020 , ... ... around the world, dedicates World Allergy Week, from June 28 to July 4, ... by SARS CoV-2. , COVID-19, short for “coronavirus disease 2019”, is a disease ...
(Date:6/25/2020)... ... June 25, 2020 , ... Denials Management, Inc. has just published The Health ... filing appeals for denials of mental health and substance use disorder (MH/SUD) treatment services. ... appeal rights and explain the steps in the appeals process. Complimentary copies of ...
(Date:6/24/2020)... ... June 24, 2020 , ... At Allerio we have chosen to do things ... communications. We knew it had to be portable, it had to be reliable, it ... to work. , We are proud to announce that Allerio has passed all FCC ...
Breaking Medicine News(10 mins):
(Date:7/4/2020)... ... ... By Heidi Jean Doerfert , During this unprecedented time when the world has ... is going full speed ahead. Founders Cynthia and Thane Murphy have brought on ... wet in marketing, social media content, research, data analysis and human resources for the ...
(Date:7/2/2020)... ... July 02, 2020 , ... Gulf Coast Pharmaceuticals ... its donation of more than $190,000 in personal protective equipment (PPE) to the ... As extreme medical shortages continue to plague the nation’s communities and healthcare facilities, ...
(Date:6/28/2020)... (PRWEB) , ... June 28, 2020 , ... ... digestive health. New studies substantiate the effectiveness of oral-care probiotics to maximize ... probiotics? While the science behind both is simple – utilizing naturally occurring ...
Breaking Medicine Technology:
Cached News: