Table 3. Performance for each tool at recommended thresholds to detect densitometric osteoporosis and number of women who would be sent for screening

	Sensitivity (95% CI)	Specificity (95% CI)	PPV (95% CI)	NPV (95% CI)	AUC	Patients Who Would Be Sent for Screening, n (%)
ORAI ≥9	52 (37–66)	67 (61–73)	25 (17–34)	87 (81–91)	0.60	104 (36)
OST <2	56 (41–69)	69 (63–75)	27 (19–37)	88 (82–92)	0.63	101 (35)
SCORE ≥6	74 (59–84)	42 (36–49)	21 (15–28)	88 (81–93)	0.58	174 (60)
FRAX ≥9.3%	36 (23–50)	73 (67–79)	22 (14–33)	84 (78–89)	0.55	81 (28)

AUC, area under the receiver operating characteristic curve; CI, confidence interval; FRAX, Fracture Risk Assessment Tool; NPV, negative predictive value; ORAI, Osteoporosis Risk Assessment Instrument; OST, Osteoporosis Self-Assessment Tool; PPV, positive predictive value; SCORE, Simple Calculated Osteoporosis Risk Estimation.