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TABLE 5: 
Findings at DSA vs those at CTA and surgery
DSACTA and Surgery
Aneurysm not presentAneurysm presentTotal
Aneurysm not present26228
Aneurysm present03939
Total264167
  • Note.—95% confidence interval (* = 97.5% one-sided), sensitivity = 39/41 = 0.95 (.835, 0.994), specificity = 26/26 = 1.0 (.868, 1.0), positive predictive value = 39/39 = 1.0 (.9.0, 1.0), negative predictive value = 26/28 = 0.93 (.765, .001), accuracy = 65/67 = 0.97 (.896, .996), kappa ± SD = .938 ± .1219.