Plain Radiography May Be Safely Omitted for Selected Major Trauma Patients Undergoing Whole Body CT: Database Study

Table 3

Performance characteristics of plain films compared to CT.

Performance characteristic	Pelvis (𝑛=44)		Chest (𝑛=201)
		95% CI		95% CI
Sensitivity	94.9	85.8–98.9	59.9	52.0–67.4
Specificity	74.4	63.6–83.4	95.7	78.1–99.9
Negative predictive values	95.3	86.9–99.0	24.7	16.2–35.0
Positive predictive value	72.7	61.4–82.3	99.0	94.6–100
Likelihood ratio of a positive test	3.7	2.4–5.9	13.8	2.4–674.0
Likelihood ratio of a negative test	0.07	0.01–0.2	0.4	0.4–0.7