Data were drawn from patient questionnaires on sleep quality, depression, and overall health.

These hormone changes weren't accounted for by their sleep quality, stress levels, or time budgeting.

There are steps you can take to improve your sleep quality.

Limit caffeine and alcohol intake, especially in the evening to help with sleep quality.

A recent clinical study investigated anxiolytic effects and influence on sleep quality.

Further study may help researchers understand more about the relationship between sleep quality and the development of alcohol use disorders, he says.

However, in contrast to this, a 2008 study did find an association with poor sleep quality.

Alcohol can cause waking in the night and interferes with sleep quality.

Weekend mode: Analyze your sleep quality without setting an alarm.

Other problems associated with excessive television viewing are poor sleep quality and a greater likelihood of taking up smoking.