Vitamin D protects against stress fracture in adolescent girls
Vitamin D intake can cut the risk of stress fractures in adolescent girls in half, especially in those who engage in increased levels of high-impact activity, according to new study results.
Researchers evaluated the relationship between intake of vitamin D, calcium, and dairy products and stress fractures in 6,712 girls participating in the ongoing prospective cohort Growing Up Today Study. Participants were aged 9 to 15 years at baseline. Dietary intake was assessed every 12 to 24 months using a standardized questionnaire.
At baseline, the mean intake of calcium and vitamin D were below the recommended dietary allowance (RDA) for girls their age. During 7 years’ follow-up, 3.9% of the girls experienced a stress fracture; 90% of these injuries occurred in girls who were participating in at least 1 hour of high-impact activity per day. Girls in the highest quintile of vitamin D intake, from either diet or supplements, had a 50% lower risk of stress fracture than girls in the lowest quintile. Among girls who participated in at least 1 hour of high-impact activity per day, those in the highest quintile of vitamin D intake had a 52% lower risk of stress fracture compared with those in the lowest quintile.
In contrast, neither calcium nor dairy intake was related to risk of developing a stress fracture. In fact, contrary to expectations, high calcium intake was associated with an increased risk of stress fracture, a finding the researchers say warrants further investigation.
Researchers note that the results of their study support the recent increase in the RDA for vitamin D for adolescents from 400 IU to 600 IU per day, but it is not known whether higher doses would further decrease the risk of stress fracture.
MORE ARTICLES IN THIS ISSUE
Sweet-tasting solutions such as glucose and sucrose are commonly used to alleviate pain in infants undergoing minor invasive procedures. Expressed breast milk may be an alternative to sweet solutions, but evidence of its analgesic efficacy is limited. Two new studies look at what works for neonatal pain relief.
A recent study suggests that health outcomes of moderate or late preterm and early term infants are worse than those of full-term infants in the early years of life and that babies born even a few weeks early have worse health outcomes. What are the implications for long-term health outcomes of preterm births on future health care services for infants and children?
The electrocardiogram (ECG) and the echocardiogram are acceptable screening tools for detecting common causes of sudden cardiac death (SCD) in children, according to a recent meta-analysis of the literature. However, more data are needed before adopting screening programs for asymptomatic children as public policy. Find out what concerns remain about widespread screening.
The developers of a dedicated, Internet-based therapeutic application for adolescents with chronic fatigue syndrome-myalgic encephalomyelitis-say that in a study of treatment through the Fatigue In Teenagers on the interNET program, 63% of adolescents reported having recovered after 6 months, almost 8 times as many as those given standard care. Now effective treatment for adolescents suffering with chronic fatigue could be as close as their laptops.