Table 3. Cook–Swartz Doppler probe diagnostic test evaluation.

Statistic	Value	95% CI
False-positive rate	7%	1–24%
False-negative rate	25%	3–65%
Sensitivity	75%	35–97%
Specificity	93%	76–99%
Positive likelihood ratio	10.12	2.52–40.75
Negative likelihood ratio	0.27	0.08–0.90

Abbreviation: CI, confidence interval.

Note : Calculated statistical values according to Cook–Swartz Doppler probe diagnostic test results and the pedicle blood flow status. False-positive and false-negative rates, sensitivity, specificity, and positive and negative likelihood ratios were assessed.