INTRODUCTION: Inadequate @entity25 patterns and @entity22 are frequently linked and represent common @entity25 among adolescents. The present study provides data on @entity25 patterns and @entity22 among Portuguese adolescents. MATERIAL E METHODS: In a cross-sectional study we evaluated 6,919 students from the 7th to the 12th grade from twenty-six secondary schools. Data was collected using a self-administered questionnaire. Insomnia was defined based on the Diagnostic and Statistical Manual of @entity146 IV criteria and @entity25 was assessed with the Epworth Sleepiness Scale. Sleep patterns evaluated both @entity25 duration ("insufficient" @entity25 was defined as < 8 hours per night) and bedtime schedules and regularity. RESULTS: The prevalence of @entity22 was 8.3%, @entity22 symptoms 21.4% and insufficient @entity25 29.3%. All prevalence were higher among @entity1 (P<.001). Average @entity25 time, on weeknights, was 8:04  1:13 hours. On average adolescents went to bed at 22:18  1:47 hours, took 21 minutes to fall asleep and woke up at 7:15  0:35 hours. Only 6.4% of adolescents stated having a regular bedtime. The majority of adolescents (90.6%) reported having difficulty waking up, 64.7% experienced @entity25 and 53.3% experienced @entity25 during classes. CONCLUSIONS: There are high prevalence of inadequate @entity25 patterns, insufficient @entity25 and @entity22 among Portuguese adolescents. Insufficient @entity25 is associated with @entity25 patterns and social and behavioural factors. These results add to our knowledge of @entity25 worldwide.

Sleep patterns and XXXX among portuguese adolescents: a cross-sectional study.

@entity1 :: ('9606', 'Species') :: ['girls'] @entity146 :: ('MESH:D001523', 'Disease') :: ['Mental Disorders'] @entity25 :: ('MESH:D012893', 'Disease') :: ['adolescent sleep', 'sleep disorders', 'daytime sleepiness', 'sleep'] @entity22 :: ('MESH:D007319', 'Disease') :: ['insomnia']
@entity22 :: (MESH:D007319,Disease) :: ['insomnia']
