The investigators found that tracheostomy rates varied widely (mean rate of 19.6 per 100 admissions; range 0 to 59) and the variation persisted after stratification by age, mechanism of injury and severity.
It is a useful measure when comparing data sets with different units or widely different means, since the standard deviation of data set is always best understood in the context of its mean.
The airplane is its most widely used means of transportation.
Minimally invasive surgery, which is widely available, means less muscle cutting, a smaller scar and a quicker recovery.
The winnowing, which was widely expected, means that Vivendi Universal is essentially left with a choice between the two competitors.
The deal, which had been widely expected, means the end of independence for Fleming, one of the last privately held investment banks based in Britain.
Environmental groups cite dozens of reported problems with Veolia's incinerator and insist that incineration in general, the oldest and most widely accepted means of disposal, is imperfect.
Indeed, many people consider free speech a universal human right and the Internet and Web the most widely accessible means to exercise that right.
It also made the killing of mosquito larvae by spreading oil on their breeding sites another widely accepted means of controlling the disease.
Indicators are necessary and widely used means to understand system behavior.
