In the previous tutorials, I showed you how to conduct a structured search for our first concept, 'Falls', in the CINAHL database. Now we can complete our search for all the other concepts, or key terms, in our question identified by the PICO model in pretty much the same way. I am going to type in my next search term— 'Vitamin D Supplementation'... and leave the 'Suggest Subject Terms' box checked. Click on the search button... So here are the suggestions of CINAHL headings. I am going to select the first two headings— 'Vitamin D', 'Vitamin D Deficiency'. I am going to make sure that the 'Explode' boxes are checked and the 'Major Concept' boxes unchecked... Notice that if you select multiple headings, the default boolean operator is 'OR'. So this means I will search for 'Vitamin D', OR 'Vitamin D Deficiency' as CINAHL headings. And the result set will be the union of all articles about either one of the concepts. I will talk in more detail about boolean operators later in this tutorial, when we come to combining searches. For now, I'm just going to click on 'Search Database'. And sure enough, I get my second result set. Next, I'm going to type in our next search term, 'Hospitalized Patients' and leave the 'Suggest Search Terms' box checked... Click on the 'Search' button... We can see that the best term for 'Hospitalized Patients' in the CINAHL headings system is 'Inpatients'. I'm going to select that. Looks like I can't check the 'Explode' box here... ...and I'll leave the 'Major Concept' box unchecked. Click on the 'Search Database' button. And here we go again— our third search is posted here. Now let's take a closer look at the search history table. As we can see, there are this many articles that are about our first concept, 'Accidental Falls', and this many about our second concept, 'Vitamin D', or 'Vitamin D Deficiency'. And this many about our third concept, 'Inpatients'. But how many of those articles are actually about all of those three concepts? As you can see from here, each of the searches was assigned a set number. This allows us to easily combine these searches. All we need to do is to select all three of them by checking these boxes. Actually, I can check this box here to select all of them at once. And then, I can choose one of these boolean operator buttons either 'AND' or 'OR'. Using 'AND' will give me the overlap of these selected sets, and using 'OR' will give me the union of the selected sets. We're looking for articles that are about all of the three concepts, so we're actually looking for the overlap of these three sets. So I'm just going to click on the 'Search with AND' button... And you can see that we now have a fourth set, which is the overlap of one, two, and three. One thing we haven't addressed here, is that our question is interested in older hospitalized patients, and not just any hospitalized patients. Age group can usually be specified with limit on the searches. If we take a look at the left-hand side of the search results, we can see that there are a couple of quick limits here. For example, I can limit my search results by 'Source Type' or 'Availability' If I want the most recently published articles, I can set a time span limit here. I can simply drag the year slider to choose a time span. To see all the limit options, I can click on the 'Show More' link. You can see that this pop-up box gives us a lot more limit options. And here is our age group limit. I am going to choose 'Age 80 and Above', in here. By the way, you can select multiple items in these boxes by using 'Control-click' on a Windows machine, or 'Command-click' on a Mac. Now I'm just going to click on the search button at the top of the pop-up box. And you can see that we now have a fifth row in our search history table. And we have five results. So this is our search strategy for our example question. We ran a separate search for each of the major concepts, or key terms, in our question identified by the PICO model. And then we combined those searches to get the overlap of those result sets. And finally, we set the age group limit to the overlapped set. So, that's all I have today for combining and limiting search results in CINAHL. In the next tutorials, we'll take a look at CINAHL's search result display and I am going to show you how to save, print, and e-mail your search results, and how to find the full text of the articles you want. I'll see you next time.