Table 4

Performance Characteristics of Questions Associated With Increased Risk of Breast Cancer

Question	Sensitivity	Specificity	Positive Predictive Value	False-Positive Rate^a
10	67^b (24/36) [49–81]	94^b (337/358) [91–96]	53^b (24/45) [38–68]	3^b (12/349) [2–6]
9	65^b (24/37) [47–80]	94^b (336/358) [91–96]	52^b (24/46) [37–67]	4^b (13/349) [2–6]
7	22^b (8/37) [10–38]	96^b (342/356) [94–98]	36^b (8/22) [17–59]	8^b (29/371) [5–11]
7 or 9 or 10	95 (35/37) [82–99]^b	86 (308/358) [82–89]^b	41 (35/85) [31–52]^b	1 (2/310) [0.1–2]^b
9 and 10	86^b (32/37) [71–95]	90^b (321/358) [86–93]	46^b (32/69) [34–59]	2^b (5/326) [1–4]

Notes: Values are expressed as percent (numerator/denominator) [95% CI].
↵a Calculated as 1 – negative predictive value.
↵b Questions or combinations of questions significantly associated with increased risk in univariate analysis.