The input for this instrument can be derived from readily available data in hospital databases.
The work presented here demonstrates that, under certain circumstances, satisfactory instrument performance assessment can be derived from system suitability tests and performance data from daily use as well.
In addition, valuable instructions for daily health care can be derived from the instruments developed for the elderly population.
Utility scores can be derived from this instrument by applying the IUI algorithm: IUI utility score = 1.051 (b1 * b2 * b3 * b4 * b5)—0.051, where b is the estimated weight attached to the 3 different levels of each of the 5 attributes.
Additional and much longer term investigation is also needed to explore whether overall scores for the multidimensional ACT concepts (e.g., structural and electronic resources, informal interactions, and organizational slack) can be derived from the instrument.
However, since no utility values can be derived from this disease-specific instrument, it is not suitable for cost-utility analyses in health-economic evaluations.
For multi-dimensional instruments the number of factors being measured by the items can be derived from exploratory factor analysis (EFA).
For older people admitted to hospital, a Frailty index can be derived from data collected using the interRAI Acute Care instrument.
Precise positional data can be derived from a number of biomechanical measurement tools, of which non-invasive 3D instruments are preferred.
A three-dimensional model can be created by viewing each pair of consecutive photographs in a stereoscope; by manipulation of a specially designed plotting instrument, the overlapping area can be correctly positioned, scaled, and oriented, and elevations of points within it can be derived from those of the four corner points.
