Prevalence of Negative Results of Computed Tomography at Sunpasitthiprasong Hospital

Abstract

          According to the statistics of the patients undergoing computed tomography (CT) at Sunpasitthiprasong Hospital, the numbers tended to go up. Comparing with other tertiary hospitals in nearby provinces, the usage of computed tomography at Sunpasitthiprasong Hospital was 2.55 times higher. The researchers are interested in the increase of CT use, which related to increases in workload, expense and excessive radiation exposure to patient.
The retrospective descriptive study had done to study the prevalence of negative results of computed tomography, by reviewing the medical records, CT images and results in patient database programs. The samples were results of CT scan which reported by radiologists between February 1st and April 30th, 2015. The 426 results enrolled by systematic sampling. The descriptive analysis was used to describe including mean, frequency, percentage and 95%CI and Pearson chi-square and Fisher’s exact test to show the relation between the information of investigation and the negative result of CT scan. The negative results were 21.1% (95%CI: 17.4-25.4) In detail, the most found results were the positive results compatible with the referring reasons/causes (67.6%). The information of investigation that statistical significantly related with negative result of CT scan were referring departments, patient’s age, examined organs, reasons for investigation, and etiology of initial diagnosis.