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Smoking and depressive symptoms in adolescent girls are 'red flag' for postmenopausal osteoporosis
Date:4/3/2013

ege of Medicine, and The Pennsylvania State University recruited 262 healthy girls between 11 and 19 years from a teen health clinic in a large children's hospital and its surrounding community to represent typically developing adolescents and enrolled them in four age cohorts (11, 13, 15, and 17 years). The goal was to have each age cohort reflect the number of smokers proportional to national statistics. The girls each attended three annual onsite visits. Phone interviews were conducted at three-month intervals between annual visits.

Bone accrual trajectories from ages 11 to 19 were estimated for total-body bone mineral content (TB BMC) and lumbar spine and total hip bone mineral density (BMD).

Investigators found that while smokers entered adolescence with equivalent levels of lumbar spine and total hip BMD, overall BMD accrual across adolescence was significantly lower as smoking frequency increased. Depressive symptoms showed a slightly different pattern. Girls with higher levels of symptoms had significantly lower lumbar spine BMD consistently across adolescence. There also was no association between alcohol use or anxiety symptoms or their interactions with age on any bone measure.

"Adolescence is a crucial period of development that lays the foundation for women's health across the lifespan," says lead investigator Lorah D. Dorn, PhD, of Cincinnati Children's Hospital Medical Center and University of Cincinnati College of Medicine, Department of Pediatrics, Cincinnati, Ohio. "As much bone is accrued in the two years surrounding menarche as is lost in the last four decades of life.

"To our knowledge, our study is the first to test and demonstrate that smoking behavior and depressive symptoms in girls have a negative impact on bone accrual across adolescence. It may be premature to advocate screening for BMD in adolescents with depressive symptoms or those who smoke, but our study should be replicated to determine whether gr
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Contact: Eileen Leahy
e.leahy@elsevier.com
732-238-3628
Elsevier Health Sciences
Source:Eurekalert

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