Usefulness of Pelvic Radiographs in the Initial Trauma Evaluation with Concurrent CT: Is Additional Radiation Exposure Necessary?

Table 2

Results of plain digital pelvic radiographs in pediatric trauma patients.

Parameter	Bony traumatic findings (n)
FN	12
FP	2
TN	135
TP	23
N	172
Sensitivity	65.71% (95% CI: 47.79-80.87%)
Specificity	98.54% (95% CI: 94.83-99.82%)
Accuracy	91.86%
NPV	91.84% (95% CI: 87.67-94.68%)
PPV	92.00% (95% CI: 74.00-97.89%)

FN: False negative, FP: False positive, TN: True negative, TP: True positive, N: total number of radiographs, NPV: Negative predictive value, PPV: Positive predictive value. Overall sensitivity and specificity were 65.71% and 98.54%, respectively, with overall accuracy of 91.86%. The positive predictive value was 92.00% and the negative predictive value was 91.84%.