BACKGROUND:Electronic cigarette (e-cigarette) use is common among youth, and there are concerns that e-cigarette use leads to future conventional cigarette use. We examined longitudinal associations between past-month cigarette and e-cigarette use to characterize the stability and directionality of these tobacco use trajectories over time.

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Background Treatment for childhood obesity is characterized by nonattendance and widespread failure to achieve weight maintenance. The use of behavioural change methods is suggested for engaging families in changing lifestyles. Qualitative methods may improve understanding of patient perceptions, thus improving treatment. The present study aimed to explore the thoughts and feelings of parents whose children had undertaken dietetic consultations either employing behavioural change techniques or delivered by dietitians with no formal training in these techniques.