Predictors of Outcomes
Median length of stay was 13 days (IQR 7.7-24). 45 patients died (31%), 71 were discharged (49 %) and 30(20%) patients were still hospitalized at the time of most recent follow up. Figure 2a shows KM survival analysis for patient stratified based on age> 60 and <60 years with a significantly higher mortality (40%) for patients more than 60 years old (compared to 14% for those 60 and below). Patients with preexisting CAD had a significantly higher mortality (62%) compared to those without (22%) Log Rank P value<0.001 (Figure 2b). Use of troponin T as a predictive instrument yielded excellent discrimination in survival such that patients with troponin T>0.01 had 43% mortality compared to 14% for those with troponin T<0.01. (Figure 3a). While the median EF was within normal limits, patients with LV dysfunction< 45% had numerically higher mortality compared to those with EF>45% (37% vs 27%; Log Rank P =0.16) (Figure 3b). On multivariate Cox analysis, age and history of CAD were independent predictors of mortality. (Table 5).