Both CINAHL and Medline contain a mix of nursing, medical and other allied health journals. If you want to limit your search to just those journals with a nursing focus follow these steps in EbscoHost.
To see articles only from nursing journals, limit the journal subset. This option is near the bottom in the drop down menu.
The medical journal that was the third result has disappeared. If you are ever unsure whether or not a journal is peer-reviewed, check it on the journal information page in EbscoHost.