The statistical analysis results showed that no significant improvement in the two main variables was recorded.
The main objective of this paper is to define the reference conditions and to propose modification factors to standardize the variables recorded by different nondestructive techniques.
Variables recorded were also the same.
Upon ICU admission, the baseline characteristics and the main variables obtained before intubation were recorded either by a nurse (from June 2006 to Jan 2009) or by computer-driven software plugged to the monitor, which recorded automatically all the variables.
We recorded the following main variables: number of trees, species code, breast height diameter at 1.3 m (d, cm), total tree height (h, m), azimuth and radius (m) from the centre of the plot (point where the diagonals cross) towards all trees of breast height diameter ≥5 cm.
The main target variables were recorded by both investigators and patients.
The measurement of the main variables of the study relies on three strategies: video recording of facial actions, monitoring of cardio-respiratory measures and oxygen saturations, collection of salivary cortisol and chart review (Table 1).
These are 6 7 ml.kg−1 and 8 12 bpm, respectively, and may explain why VT and VR were the main variables used to define ventilation efficiency in the studies reviewed, even though many others were recorded.
There is evidence that the coding of hospital discharge records in Scotland is reliable, at least for the main variables, such as primary operative procedure (Harley and Jones, 1996).
Four independent variables were recorded.
