These include: Hospital lifetime reserve days: Medicare Part A covers a stay in the hospital for any single spell of illness or injury within a time frame of 90 days. This is known as a benefit period, and thereâs no limit to the number of benefit periods you can have. But if you need to stay in the hospital for more than 90 days with the same illness or injury, you have the option of using some of your 60 lifetime reserve days.
Pain measures fall into 2 categories: 1  Single-dimensional scales - These scales assess a single dimension of pain and, through patient self-reporting, measure only pain intensity; these scales are useful in acute pain when the etiology is clear; see the image below Faces Pain Rating Scale.
The ratio scale of measurement is the most informative scale. It is an interval scale with the additional property that its zero position indicates the absence of the quantity being measured. You can think of a ratio scale as the three earlier scales rolled up in one. Like a nominal scale, it provides a name or category for each object (the numbers serve as labels). Like an ordinal scale, the objects are ordered (in terms of the ordering of the numbers). Like an interval scale, the same difference at two places on the scale has the same meaning. And in addition, the same ratio at two places on the scale also carries the same meaning.