Analysis of survival for patients in relation to central venous catheter and nosocomial blood stream infections: A case study of Aga Khan University Hospital, Nairobi

Abstract

Background: This study was focussed on survival rates of patients admitted to acute care units who utilized medical devices known as central venous catheters (CVC). CVCs are useful devices in clinical care; however some infections such as central line associated bloodstream infections (CLABSI) may occur, which are associated with increased lengths of stay and costs as well as higher morbidity and mortality rates. The overall objective of the present study was to determine survival probabilities and hazard rates for patients who used CVC devices and compare the subgroups by infection status. Methods: The study was focused on all patients who were admitted to Critical Care Units between 8 th December 2012 and 31 st March 2016 and utilized CVC devices. It was a retrospective study. Survival analysis techniques, test of equality of proportions, Man-Whitney test and Chi–square test of independence were used. Results: A total of 363 out of 1089 patients included in the study died during hospitalization. 47 patients developed nosocomial CLABSI. The average duration was 18.19 days and median of 12 days for hospitalized patients who did not develop a nosocomial CLABSI compared to an average of 56.79 days and a median of 51 days for those who did. There was a significantly higher proportion of mortality of those who developed nosocomial CLABSI compared to those that didn’t (p-value=0.01379). The results indicate that there was a significant association between infection status and discharge status, and significant difference to the survival rates of the patients based on infection status. Conclusions: There is a significant impact on mortality and morbidity of patients who develop nosocomial CLABSI. The duration of hospitalization by patients who developed CLABSI was significantly higher compared to patients who did not. Increased length of stay leads to higher cost of hospitalization.