"Together, these can have a big impact on mortality risk across time."

Surgery is required due to the high risk of mortality.

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

People who reported sleeping for less than four and a half hours had big increases in their mortality risk.

For these patients, not operating carries a higher mortality risk.

There however is some short-term mortality risk of less than 1% from the surgery.

In most centers, the mortality risk for surgery is between zero and 2%.

A similar study found that many patients with a low predicted mortality risk were likely admitted for these reasons.

Women ages 20-29 with nocturia had a 10% increased risk of mortality, but that could have been due to chance.

These women were also shown to have reduced risk of "all-cause mortality."