Frequent cannabis use by young people linked to decline in IQ


A study has found that adolescents who frequently use cannabis may experience a decline in Intelligence Quotient (IQ) over time. The findings of the research provide further insight into the harmful neurological and cognitive effects of frequent cannabis use on young people.

The paper, led by researchers at RCSI University of Medicine and Health Sciences, is published in Psychological Medicine.

The results revealed that there were declines of approximately 2 IQ points over time in those who use cannabis frequently compared to those who didn’t use cannabis. Further analysis suggested that this decline in IQ points was primarily related to reduction in verbal IQ.

The research involved systematic review and statistical analysis on seven longitudinal studies involving 808 young people who used cannabis at least weekly for a minimum of 6 months and 5308 young people who did not use cannabis. In order to be included in the analysis each study had to have a baseline IQ score prior to starting cannabis use and another IQ score at follow-up. The young people were followed up until age 18 on average although one study followed the young people until age 38.

“Previous research tells us that young people who use cannabis frequently have worse outcomes in life than their peers and are at increased risk for serious mental illnesses like schizophrenia. Loss of IQ points early in life could have significant effects on performance in school and college and later employment prospects,” commented senior author on the paper Professor Mary Cannon, Professor of Psychiatric Epidemiology and Youth Mental Health, RCSI.

“Cannabis use during youth is of great concern as the developing brain may be particularly susceptible to harm during this period. The findings of this study help us to further understand this important public health issue,” said Dr Emmet Power, Clinical Research Fellow at RCSI and first author on the study.

The study was carried out by researchers from the Department of Psychiatry, RCSI and Beaumont Hospital, Dublin (Prof Mary Cannon, Dr Emmet Power, Sophie Sabherwal, Dr Colm Healy, Dr Aisling O’Neill and Professor David Cotter).

The research was funded by a YouLead Collaborative Doctoral Award from the Health Research Board (Ireland) and a European Research Council Consolidator Award.

Link Original: https://www.sciencedaily.com/releases/2021/01/210128134755.htm?fbclid=IwAR1Qrhejc9x-9uGRofHtmX8YX4E6qukoS7LIVMK8iwYvcaitU_RVCH4G_xo


‘Loss of pleasure’ found in teen sleep study

Sleep patterns around the world have been disrupted as screen time increases and sleep routines change with COVID-19 self-isolation requirements. Negative mood is not unusual in adolescence, but lack of sleep can affect mental health, causing anhedonia (or loss of pleasure), anxiety, anger and significantly increasing the risk of depression, a global study of more than 350,000 teens shows.

Sleep patterns around the world have been disrupted as screen time increases and sleep routines change with COVID-19 self-isolation requirements.

Negative mood is not unusual in adolescence, but lack of sleep can affect mental health, causing anhedonia (or loss of pleasure), anxiety, anger and significantly increasing the risk of depression, a global study of more than 350,000 teens shows.

The results just published in Sleep Medicine Reviews connects less sleep with a 55% increased chance of mood deficits and double the risk of reduced positive mood.

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Maconha na adolescência aumenta risco de depressão e suicídio

Segundo estudo, a probabilidade de desenvolver depressão aumenta em 37%, enquanto o risco de pensamentos suicidas eleva em 50%

Na área da medicina, sou categórico em afirmar que quanto mais dados científicos confiáveis, que possam embasar tratamentos ou políticas públicas, melhor. Isso deveria ser praxe e não uma novidade, mas em tempos de fake news e da divulgação de um grande volume de estudos questionáveis, esses dados assumem uma importância ainda maior.

No último dia 13 de fevereiro, a JAMA Psychiatry, uma das publicações científicas mais respeitadas do mundo, divulgou um artigo que traz uma conclusão alarmante: quem usa maconha na adolescência tem um risco maior de desenvolver depressão ou comportamento suicida na vida adulta. Confira o artigo completo clicando aqui.

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Energéticos: estudo confirma risco cardiovascular por consumo em jovens

Filadélfia, EUA — Uma metanálise de cinco ensaios clínicos deflagra um novo “sinal de alerta” em relação ao risco cardiovascular associado ao consumo das bebidas chamadas de energéticas, ou simplesmente energéticos, embora os autores suspeitem que seus efeitos nocivos não possam ser atribuídos direta e exclusivamente ao alto teor de cafeína. [1]

“Na consulta médica, geralmente falamos sobre colesterol, tabagismo e exercício (…) mas também precisaríamos indagar de rotina os pacientes acerca do consumo de energéticos, e em qual quantidade, porque suas consequências podem ser desastrosas”, disse ao Medscape um dos principais autores do estudo, Dr. Carlos Alviar, cardiologista e diretor da Unidade Coronarianado Bellevue Hospital Center, nos Estados Unidos, afiliado à New York University School of Medicine.

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Nearly a quarter of 14-year-old girls in UK self-harm, report finds

Girls are unhappier with their lives and more likely to have depression than their male peers, researchers found.

London (CNN) — Nearly a quarter of 14-year-old girls in the United Kingdom have self-harmed, with many facing overwhelming pressures over how they should look, their sexuality and how they behave, according to a new report by The Children’s Society.
It found that 22% of 14-year-old girls had self-harmed in the course of a year, compared with 9% of boys.

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Teenagers who smoke cannabis damage their brains for LIFE and may be more likely to develop schizophrenia

 

 

 

 

 

 

Teenagers who regularly smoke cannabis suffer long lasting brain damage and are in much greater danger of developing schizophrenia. 

American researchers say the drug is particularly dangerous for a group of people who have a genetic susceptibility to the mental health disorder – and it could be the trigger for it.

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Maconha na adolescência é uma fábrica de losers

“Maconha na adolescência é uma fábrica de losers”, afirma psiquiatra Sérgio de Paula Ramos. – Especialista em dependência química com mais de 40 anos de carreira, o médico ressalta que a intervenção precoce é fundamental

A dependência química é uma doença democrática, define o psiquiatra e psicanalista Sérgio de Paula Ramos, 67 anos. Atinge, na mesma medida, as classes alta, média e baixa. No país, 12% da população têm transtorno por uso de álcool; de 4% a 5%, por consumo de outras drogas; e dependentes de tabaco somam 13% dos brasileiros. É o grande problema de saúde pública deste século, segundo o médico, uma das mais destacadas autoridades no tema.

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