P   "subject term" OR "keyword(s)"

AND

I "subject term" OR keyword(s)"

OR

C "subject term/keyword" (may not apply)

AND

O "subject term" OR "keyword(s)"

• High Sensitivity = Low Precision
• Recall/Sensitivity - the number of relevant reports divided by the total number of existing relevant reports
• Precision - the number of relevant reports divided by the total number of reports identified