Table 6.

Performance of MEDLINE and EMBASE Filters

Filter	Retrieved			Sensitivity % (95% CI)	Precision % (95%CI)	Specificity % (95% CI)
	Reference Standard	Total	% Reduction
MEDLINE
No filter	206	1564	-	100.0	13.2 (11.5–14.9)
Precision	205	979	37.4	99.5 (98.5–100.)	20.9 (18.4–23.4)	42.9 (40.3–45.5)
Specificity	205	972	37.9	99.5 (98.5–100.)	21.1 (18.5–23.7)	43.5 (40.4–46.6)
EMBASE
No filter	191	1521	-	100.0	12.6 (10.9–14.3)
Precision	191	1065	30.0	100.0	17.9 (15.6–20.2)	35.3 (32.7–37.9)
Specificity	191	1016	33.2	100.0	18.8 (16.4–21.2)	38.0 (35.1–39.8)
MEDLINE/EMBASE
No filter	217	1959	-	100.0	11.1 (9.7–12.5)
Precision	217	1298	33.8	100.0	16.7 (14.7–18.7)	37.9 (35.3–40.5)
Specificity	217	1266	35.4	100.0	17.1 (15.0–19.2)	39.8 (37.1–42.5)