… sleep duration was positively associated with subsequent suicidal ideation and suicide
attempts, and nonmedical use … short weekday sleep duration and nonmedical use of prescription …

… sleep duration may impact upon drug use and academic performance. This study aimed to
estimate the prevalence of sleep duration, … associations of sleep duration with NMUPD, and to …

… that stimulants increase sleep latency, decrease sleep duration, and lead to increased …
associated with less sleep duration, longer sleep latency, increased trouble sleeping, and more …

… a range of sleep variables, including sleep duration, sleep disturbance, sleep problems,
daytime … on school nights were significantly more likely to report non-medical use of prescription …

… Descriptive analyses first characterized the total sample (Table 1), as well as the sample
by type of drug used extra medically for sleep and reason for last non-medical use of …

… 7–12) had engaged in nonmedical use of four specific … factor for short sleep duration 13 ,
and the prevalence of sleep … physical activity influences sleep duration among adolescents 13…

… A cohort effect in sleep duration would imply that factors which are becoming … nonmedical
use of prescription medication 19 ) underlie trends over time, and that efforts to improve sleep …

… Munezawa et al. showed that mobile phone use for calling and for texting after lights out was
associated with short sleep duration, poor sleep quality, excessive daytime sleepiness, and …

… to examine the relationship between substance use and sleep duration among adolescents.
… Fourthly, the sleep variable in this study only measures the duration (hours of sleep on …

… sleep duration was 7.08 h/d (95% confidence interval [CI]: 6.84 to 7.32 h/d). The percentage
of students with sleep duration shorter than 6 h/d and 7 h/d (short sleep) … and non-medical …