Another study of sleep duration and mortality risk in women showed similar results.

The effect of sleep duration on somatic growth is not completely known.

It was found that "the variation of sleep duration among children does not seem to have an effect on growth."

After controlling for sleep duration and insomnia, use of sleeping pills was also found to be associated with an increased mortality rate.

The changes in hormones with sleep duration were consistent and of significant magnitude.

This is the first study that shows a relationship between short sleep duration itself and high blood pressure.

Altering sleep duration may prove to be an important adjunct to preventing and treating obesity.

There is a well-documented relationship between short sleep duration and high body mass index (BMI).

Short sleep duration is associated with high levels of ghrelin and obesity.

Short sleep duration may also lead to obesity, through an increase of appetite via hormonal changes.