Nevertheless, since this threshold was below the precision of echocardiography, the authors suggested a 10% threshold, even though it reduced the test accuracy (Table 1).
At the present time there is little information concerning the methodology used to determine the threshold of postoperative cTnI, and the precision of this threshold determination has never been studied.
In particular, the process was terminated whenever any of these monitored parameters fell below the threshold of 2·10−6 (dictated by the precision of calculations), which was achieved in all cases in less than 106 steps.
The following measure captures the effect of both post-threshold relevant records and TPIRs: (1) To summarize Equation (1), it assigns the post-threshold relevant records a precision of 0, considers the precision at the sentinel record, and then averages the precision of the pre-threshold relevant, sentinel and post-threshold relevant records.
First, although we define diagnostic thresholds for CNFL, we acknowledge that sample size and measurement error limit the precision of these specific threshold values.
Nevertheless, combining end-expiratory and end-inspiratory occlusions induces larger SV changes and increases the value of the threshold, what is more compatible with the precision of echocardiography and oesophageal Doppler.
In addition, we proposed a method to evaluate the precision of the threshold determination.
The precision of the threshold estimate for each series was determined using a resampling technique in which the models used to identify the optimum threshold were repeated 1,000 times with 10% of the subjects omitted at random from each iteration.
Theoretically, increased effort to detect the visual fields' change could be invested in (a) enhanced spatial resolution, as is done in this study by local condensation of the test grid; (b) improving the precision of the threshold estimation of a standard grid; or (c) increasing the frequency of examinations with the standard grid.
The response category thresholds were ordered as expected and the precision of the scale was good, with PSI 2.14 and PSR 0.82, supporting the ability of the scale to discriminate at least three levels of well-being.
