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Table 6 Performance of MEDLINE and EMBASE Filters

From: Identifying observational studies of surgical interventions in MEDLINE and EMBASE

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)