There are no filters for quantitative articles in the search system or databases. One way you can narrow down to these studies is to add a search term of quantitative to your search statement. Example: "heart disease" AND diet AND quantitative.
You will need to read through the article abstracts of the results to determine if the study meets the criteria of a quantitative study. To increase the likelihood of finding a quantitative article, be sure to use filters to narrow your search results to peer-reviewed, scholarly or research articles. Each database will have different filters, but most will have something that will allow you to limit to these types of articles.
If you are looking specifically for randomized controlled trials, which are a specific type of quantitative study, there are tips for finding these on the Randomized Controlled Trials page of this guide.