Author Interviews, Brigham & Women's - Harvard, Cannabis, JAMA, Mental Health Research, Pediatrics / 19.12.2018
When Asked, Teens Frequently Report Hallucinations, Paranoia or Anxiety with Marijuana Use
MedicalResearch.com Interview with:
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Dr. Levy[/caption]
Sharon Levy, MD, MPH
Director, Adolescent Substance Use and Addiction Program
Boston Children's Hospital
Associate Professor of Pediatrics
Harvard Medical School
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: For this study we analyzed data that were collected as part of a larger survey study that recruited a sample of adolescents who were coming to the doctor's office for routine medical care. We asked them a lot of questions about their health, school, extracurricular activities, plans for the future, substance use patterns and problems associated with use among other things.
The main finding was that among the participants who reported marijuana use in the past year, many of them, more than 40%, said that they had experienced either an hallucination, or paranoia/anxiety related to their use.
Kids who used more frequently and those who met criteria for a substance use disorder were more likely to experience these symptoms, as were those who had symptoms of depression
Dr. Levy[/caption]
Sharon Levy, MD, MPH
Director, Adolescent Substance Use and Addiction Program
Boston Children's Hospital
Associate Professor of Pediatrics
Harvard Medical School
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: For this study we analyzed data that were collected as part of a larger survey study that recruited a sample of adolescents who were coming to the doctor's office for routine medical care. We asked them a lot of questions about their health, school, extracurricular activities, plans for the future, substance use patterns and problems associated with use among other things.
The main finding was that among the participants who reported marijuana use in the past year, many of them, more than 40%, said that they had experienced either an hallucination, or paranoia/anxiety related to their use.
Kids who used more frequently and those who met criteria for a substance use disorder were more likely to experience these symptoms, as were those who had symptoms of depression

Dr. Barrett[/caption]
Charles Barrett. Ph.D.
School Psychologist
Loudon County Virginia
Public Schools
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Numerous studies have shown that Black children are more likely to receive ratings that are more indicative of displaying externalizing behavior difficulties, including Attention Deficit Hyperactivity Disorder (ADHD). However, many of these studies included teachers as the informants. Consistent with most teachers in the United States, raters have typically been White females. For this reason, it is unclear if these outcomes would exist if the rater and child shared the same racial/ethnic background. Additionally, most research in the United States that involved cross-cultural comparisons has used White and Hispanic boys. Few empirical studies have examined differences between Black and White boys.
The present study sought to address several limitations in the field. Most notably, cross-cultural comparisons between Black and White boys were included instead of Hispanic and White children. Next, maternal figures, rather than teachers, were included as the informants.
The present study was developed using a similar methodology that examined Hispanic and White boys’ behavior from the perspective of Hispanic and White teachers (Dominguez de Ramirez & Shapiro, 2005). In sum, we sought to determine if there were differences in how Black and White maternal figures rated Black and White boys who were demonstrating the same level/type of behavior (i.e., sub-clinical levels of
Dr. Nidich[/caption]
Sanford Nidich, Ed.D.
Director, Center for Social-Emotional Health
Maharishi University of Management Research Institute
Fairfield, Iowa
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Posttraumatic stress disorder (PTSD) is a complex and difficult-to-treat disorder, affecting 10-20% of veterans across eras. Previous research raised the question of whether a non-trauma focused treatment can be as effective as trauma exposure therapy in reducing PTSD symptoms. The overall objective of the study was to compare Transcendental Meditation (TM), a non-trauma focused practice, to prolonged exposure (PE) in a non-inferiority clinical trial, and to compare both to a PTSD health education control group.
Transcendental Meditation was found to be as effective as PE in reducing PTSD symptoms severity from baseline to three-month posttest. In standard superiority comparisons, significant reductions in PTSD symptoms were found for TM vs. HE, and PE vs. HE. Percentages of participants with clinically significant improvement, as measured by the Clinician-Administered PTSD Scale (CAPS) interview (≥10 point reduction), were TM=61%, PE=42%, and HE=32%
Dr Sarah Myers PhD
Honorary Research Associate
UCL Department of Anthropology
MedicalResearch.com: What is the background for this study?
Response: Postnatal or postpartum depression is unfortunately common after giving birth; a figure often quoted is 15%, but some studies have found much higher numbers. Postnatal depression is associated with a range of poorer outcomes for mothers and their infants, and the financial costs of treating maternal mental ill health put health services under considerable strain. Studies have found that providing additional emotional support to at risk mothers, for instance via peer support programmes or regular phone calls with health visitors, can reduce the likelihood of them developing the condition. Therefore, it is really important that we understand the full range of risk factors that put women at greater risk of becoming depressed after giving birth.
There is increasing evidence for a link between inflammation and depression, with factors that trigger an inflammatory immune response also increasing the likelihood of depressive symptoms. The opens up the possibility of finding new risk factors for postnatal depression based on known associations with inflammation.
Dr. McLaughlin[/caption]
Ryan J. McLaughlin, PhD
Assistant Professor
Department of Integrative Physiology & Neuroscience
College of Veterinary Medicine
Washington State University
Pullman, WA 99164-7620
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: The use of cannabis during pregnancy is a growing health concern, yet the long-term cognitive ramifications for developing offspring remain largely unknown. Human studies exploring the long-term effects of maternal cannabis use have been sparse for several reasons, including the length and cost of such studies, as well as the fact that experimentally assigning mothers to smoke cannabis during pregnancy is obviously ethically impractical. Animal models of maternal cannabis use have been advantageous in this respect, but they have been limited by the drugs used (synthetic cannabinoids vs. THC vs. cannabis plant) and the way that they are administered. In our study, we used a more translationally relevant animal model of maternal cannabis use that exposes pregnant rat dams to whole plant cannabis extracts using the intra-pulmonary route of administration that is most common to human users. Our preliminary data indicate that twice-daily exposure to a high-dose cannabis extract during pregnancy may produce deficits in cognitive flexibility in adult rat offspring. Importantly, these rats did not experience general learning deficits, as they performed comparably to non-exposed offspring when required to follow a cue in their environment that dictate reinforcer delivery. Instead, deficits were observed only when rats were required to disregard this previous cue-based strategy and adopt a new egocentric spatial strategy in order to continue receiving the sugar reinforcers.
Sean C. Rose, MD
Pediatric sports neurologist and co-director
Complex Concussion Clinic
Nationwide Children’s Hospital
Assistant professor of Pediatrics
The Ohio State University
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: The link between sub-concussive head impacts and declines in neurocognitive function has been reported by some studies, yet refuted by others. There is very little evidence that has been collected in children as they are sustaining these head impacts.
We initiated a multi-year study of youth football players to provide a more in-depth look at the question. We measured head impacts using helmet sensors during the 2016 football season. 112 players age 9-18 completed a battery of neurocognitive tests before and after the football season.
We found that neither the total burden of head impacts nor the intensity of individual impacts were associated with changes in testing performance from pre to post-season.