Associations between alcohol outlet densities and adolescent alcohol consumption: a study in Australian students.

OBJECTIVE: To assess whether the density of alcohol sales outlets in specific geographic communities is associated with adolescent alcohol consumption. METHOD: A cross-sectional representative sample of secondary school students from Victoria, Australia (N=10,143), aged between 12 and 17 years, self-reported on alcohol use in the last 30 days in 2009. The density of alcohol outlets per local community area was merged with this information. RESULTS: After controlling for risk factors, multilevel modelling (MLM) revealed a statistical interaction between age and density on alcohol consumption. While older adolescents had higher alcohol consumption, increases in the density of alcohol outlets were only significantly associated with increased risk of alcohol consumption for adolescents between the ages of 12 and 14. CONCLUSION: Increased alcohol availability was associated with an increased risk of alcohol consumption specifically for early adolescents (12 and 14 years). Potential mechanisms as to how density is associated with direct and indirect alcohol availability, such as through parents or older siblings, need to be explored in future research.

Acute increases in night-time plasma melatonin levels following a period of meditation.

To determine whether a period of meditation could influence melatonin levels, two groups of meditators were tested in a repeated measures design for changes in plasma melatonin levels at midnight. Experienced meditators practising either TM-Sidhi or another internationally well known form of yoga showed significantly higher plasma melatonin levels in the period immediately following meditation compared with the same period at the same time on a control night. It is concluded that meditation, at least in the two forms studied here, can affect plasma melatonin levels. It remains to be determined whether this is achieved through decreased hepatic metabolism of the hormone or via a direct effect on pineal physiology. Either way, facilitation of higher physiological melatonin levels at appropriate times of day might be one avenue through which the claimed health promoting effects of meditation occur.

Promoting reduced smoking rates in the context of workplace smoking bans.

A randomized study was conducted in 41 workplaces to determine the potential of self-help and group-based programs to encourage reduced smoking in workplaces that have implemented smoking bans. The trial had limited success in recruiting smokers, attrition was an important limitation, and the study outcomes were modest. The authors conclude that more research is needed on effective strategies that help smokers minimize smoking at work.