Perhaps you should try some spelling variations:
"ct cases increased" » "ct rate increased" (Expand Search), "ct levels increased" (Expand Search), "c2 cases increased" (Expand Search), "chd cases increased" (Expand Search), "ckd cases increased" (Expand Search)
"ct marked decrease" » "ct marked increase" (Expand Search), "_ marked decrease" (Expand Search), "a marked decrease" (Expand Search), "n marked decrease" (Expand Search)
"ct larger decrease" » "_ larger decrease" (Expand Search), "c large decrease" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("ct cases increased") OR ((("ct larger decrease") OR ("ct marked decrease"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"ct cases increased\") OR (((\"ct larger decrease\") OR (\"ct marked decrease\"))))*".
• Removing quotes may allow a broader search: (( ct cases increased ) OR ((( ct larger decrease ) OR ( ct marked decrease ))))*.