@oristarA,
oristarA wrote:
Could I understand "Key phrases with the highest percentage of Web sites containing inaccurate information " as "Key phrases that produce the highest percentage of hits (of Google search result) on Web sites containing inaccurate information...?
Yes. Google searches and indexes web pages; when you type a word or phrase into the search box, you are shown pages that contain all or some of the words in that phrase. Some pages about infant care contain what is judged (by some researchers) to be inaccurate information, namely that parent-child bed sharing is a good thing. The article you quoted showed a list of search phrases which had been used, and for each such phrase, the percentage of pages found with (judged to be) accurate information.
Researchers entered 13 key phrases pertaining to infant sleep safety, and then analyzed a total of 1,300 Web sites found through Google search. Less than half (43.5 percent) of the sites listed contained infant sleep safety information that reflects American Academy of Pediatrics (AAP) recommendations.