Age of First Pot Smoking Does Matter

MedicalResearch.com Interview with:
Natalie Castellanos Ryan, PhD

École de Psychoéducation
Université de Montréal
Outremont Canada 

MedicalResearch.com: What is the background for this study?

Response: Our study followed a group of boys living in low socioeconomic neighbourhoods in Montreal (N=1030) from early childhood to 28 years of age to investigate:

1) whether the age at which one starts to use cannabis across adolescence is associated with the risk of developing drug abuse by early adulthood, when one controls for  arrange of known risk factors for cannabis use and problems assessed across development (risk factors in childhood, adolescence and early adulthood); and

2) the developmental pathways from early risk factors to drug abuse problems.

To examine these associations, the study collected  self-reported cannabis use information from these boys annually from ages 13 to 17 years and drug abuse symptoms at 28 years, as well as teacher, parent and child reported information on a number of environmental (family and friend) and child characteristics (e.g., impulsivity, delinquency, school performance) across childhood and adolescence. Alcohol and other drug use was also assessed across adolescence and early adulthood.

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Later Puberty Linked To Lower Adult Bone Density

MedicalResearch.com Interview with:

Dr. Cousminer

Dr. Cousminer

Diana L. Cousminer, PhD
Division of Human Genetics
Children’s Hospital of Philadelphia
Philadelphia, PA 19104

MedicalResearch.com: What is the background for this study? What are the main findings?

Response: Osteoporosis is a significant public health burden, with origins early in life. Later puberty and lower adolescent bone mineral density are both risk factors for osteoporosis.

Geneticists have identified hundreds of genetic variants across the genome that impact pubertal timing, and we found that collectively this variation also plays a role in bone mineralization during adolescence. Additionally, we found that later puberty caused lower adult bone density.

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Sugar-Sweetened Beverages Linked To Earlier Puberty in Girls

Karin B. Michels, MPH, PhD, ScD Department of Epidemiology, Harvard School of Public Health Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA Obstetrics and Gynecology Epidemiology Center, Department of Obstetrics, Gynecology and Reproductive Biology, Brigham and Women's Hospital, Harvard Medical SchoolMedicalResearch.com Interview with:
Karin B. Michels, MPH, PhD, ScD

Department of Epidemiology, Harvard School of Public Health
Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School,
Obstetrics and Gynecology Epidemiology Center, Department of Obstetrics, Gynecology and Reproductive Biology, Brigham and Women’s Hospital, Harvard Medical School Boston MA

Medical Research: What is the background for this study? What are the main findings?

Response: Sugar-Sweetened Beverage consumption is associated with earlier age at menopause.

Medical Research: What should clinicians and patients take away from your report?

Response: Sugar-Sweetened Beverage consumption may explain part of why puberty is starting earlier and earlier in girls. This is another reason besides childhood obesity which also results from Sugar-Sweetened Beverage consumption to curb the consumption of Sugar-Sweetened Beverage in children.

Medical Research: What recommendations do you have for future research as a result of this study?

Response: We would like to better understand the underlying mechanisms.

Citation:

Sugar-sweetened beverage consumption and age at menarche in a prospective study of US girls
J.L Carwile, W.C Willett, D. Spiegelman, E. Hertzmark, J. Rich-Edwards, A.L Frazier, and K.B Michels

Hum. Reprod. first published online January 27, 2015 doi:10.1093/humrep/deu349

 

MedicalResearch.com Interview with:, & Karin B. Michels, MPH, PhD, ScD (2015). Sugar-Sweetened Beverages Linked To Earlier Puberty in Girls http://MedicalResearch.com

Adolescent Girls: Early Puberty, Negative Peer Influence, and Problem Behaviors

Sylvie Mrug, PhD Departments of Psychology and Health Behavior University of Alabama at Birmingham, Birmingham, Alabama;MedicalResearch.com Interview with:
Sylvie Mrug, PhD
Departments of Psychology and Health Behavior
University of Alabama at Birmingham, Birmingham, Alabama;

 

MedicalResearch.com: What are the main findings of the study?

Dr. Mrug: Experiencing early puberty and having a best friend who misbehaves at age 11 both contribute to more aggressive and delinquent behavior in adolescent girls. Although most of these effects are transient and disappear by age 16, early maturing girls are at risk for continually higher delinquent behavior. Early puberty also seems to make girls more vulnerable to negative peer influences.
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