Fig 1.
Flowchart illustrating the selection of patients included in the study. B-MEPS: Brief Measure of Emotional Preoperative Stress.
Table 1.
Descriptive statistics for B-MEPS items (n = 1016).
Fig 2.
Item characteristic curve for the item B-MEPS 4: “I feel confused”.
The curve shows the probability of endorsing a particular item response. The level of preoperative stress required to respond to the category “not to all” and to respond “somewhat” is 0.972 deviations above average. To change to category “moderately or very much so”, the individual needs to present a stress level of 1.681 above average. B-MEPS 4: Brief Measure of Emotional Preoperative Stress 4.
Fig 3.
Item information curves of B-MEPS.
The horizontal axis reflects the latent trait level of the test taker and the vertical axis reflects the probability of endorsing an item. The curve shows the region where the group of items (B-MEPS) estimates the latent trait of “emotional preoperative stress” with greater accuracy. The item characteristic curve represents the probability of patients positively answering the items according to their emotional stress on a continuum. B-MEPS: Brief Measure of Emotional Preoperative Stress.
Fig 4.
Digital tool to perform the preoperative stress calculation.
Fig 5.
Scatter plot of B-MEPS result and Central Sensitivity Index (n = 153).
B-MEPS: Brief Measure of Emotional Preoperative Stress.
Table 2.
General health and surgical characteristics in low or high preoperative stress patients (n = 153).
Table 3.
Pain evaluation in 12, 24 and 48 hours comparing patients with high preoperative stress versus intermediate-low stress group (low stress).