1.Search for HYPERTENSION
2. Maps to the Medical Subject Heading (MeSH) term = HYPERTENSION 3.You can apply "SUBHEADINGS" to your MeSH terms to get at the "TYPE OF QUESTION in your PICOTTT" as there are subheadings for diagnosis, etiology, therapy, prevention & control, and more.
4.This question is a "THERAPY" question, so I apply the "therapy" subheading to the HYPERTENSION MeSH term
5.Search for LOW SODIUM DIET
6.Maps to the Medical Subject Heading (MeSH) term = DIET,SODIUM-RESTRICTED
7.No need to apply a subheading to this MeSH term
8.Combine the two MeSH terms with an AND
9.As a last step, apply LIMITS
"PUBLICATION TYPES" - these will help you limit to the last of the Ts in PICOTTT - Type of Study
Many Publication Types are included as Limits. However, they do not include: Case-Control Studies and Cohort Studies - these two must be searches as MeSH terms and added to your other search terms during your search.
I would select "Randomized Controlled Trial" in this case as it is a strong study design for therapy questions
But there are many other study designs to select from, such as Systematic Review and Meta-Analysis