Table 2.

Accuracy measures of the alternative triage guidelines compared to current triage guidelines for identifying seriously injured patients 65 years and older (validation sample n = 13,401).

	Current triage guidelines	Alternative triage guidelines
ISS ≥ 16:	n = 605
Sensitivity	75.9% (72.5–79.3%)	92.1% (89.8–94.5%)
Specificity	77.8% (77.1–78.5%)	41.5% (40.6–42.4%)
AUC	0.77 (0.75– 0.79)	0.67 (0.66–0.68)
# patients under-triaged	146	48
# patients over-triaged	2,840	7,485
Serious TBI:	n = 634
Sensitivity	64.5% (60.8–68.2%)	87.9% (85.2–90.5%)
Specificity	77.4% (76.6–78.1%)	41.4% (40.5–42.2%)
AUC	0.71 (0.69–0.73)	0.65 (0.63–0.66)
# patients under-triaged	225	77
# patients over-triaged	2,890	7,485
Serious chest injury:	n = 453
Sensitivity	57.2% (52.6–61.7%)	82.6% (79.0–86.3%)
Specificity	76.5% (75.8–77.3%)	40.8% (39.9–41.6%)
AUC	0.67 (0.65–0.69)	0.62 (0.60–0.64)
# patients under-triaged	194	79
# patients over-triaged	3,040	7,668
Serious abdominal-pelvic injury:	n = 233
Sensitivity	38.6% (32.4–44.9%)	72.5% (66.2–78.8%)
Specificity	75.6% (74.9–76.4%)	40.2% (39.4–41.1%)
AUC	0.57 (0.54–0.60)	0.56 (0.53–0.60)
# patients under-triaged	143	64
# patients over-triaged	3,209	7,874

^*Parentheses represent 95% confidence intervals. ISS = Injury Severity Score; TBI = traumatic brain injury; AUC = area under the curve.