SAS and Delirium
Data of SAS score of patients were presented in Table 3. The incidence
rate of delirium was strongly associated with intraoperative SAS score
.Patients who developed delirium after OPCABG had significant lower SAS
score than those without delirium (P<0.001), and the univariate and
multivariate regression analysis showed that the intraoperative SAS
score was significant predictors of delirium following OPCABG (P<0.001;
P<0.001) (Table 5 and 3).
In the Kaplan-Meier analysis, we stratified SAS score according to
previous reports, we categorized SAS score ≤3 as A, 4~6
as B, 7~10 C.
As shown in Fig.2, the incidence rate of postoperative delirium was
strongly associated with stratification of SAS score and lower
stratification of SAS score was predictive of higher delirium incidence
rate. The cumulative event rates of delirium in Kaplan-Meier survival
curves showed that patients with lower stratification of SAS score had a
significant higher incidence rate of delirium (P<0.001). The predictive
value of intraoperative SAS score for incidence of new onset SAS score
following OPCABG were depicted in Fig. 3, the area under ROC was 0.934
(95%CI, 0.907-0.960, P<0.001), which also indicated that delirium
score less than 4.5 was independent predictors of delirium.