NCIt definition : A semi-sitting position whereby the head of an adjustable bed is elevated to the desired
height, about 60-90 cm, to produce angulation of the body, usually 45 to 60 degrees.
Knees may or may not be bent.;
Alternative definition : CDISC: A semi-sitting position whereby the head of an adjustable bed is elevated to
the desired height, about 60-90 cm, to produce angulation of the body, usually 45
degrees to 60 degrees. Knees may or may not be bent. (NCI);