The Research Question
Start with a narrative question
Example: Are prophylactic antibiotics effective for preventing infections in total joint replacement?

Consider all the possible keywords, you may need to use them in different combinations.
Some researchers find the PICO acronym useful in creating a research question. PICO stands for:
P: Patient or Population
I: Intervention
C: Comparision
O: Outcome
Research Question: Are prophylatic antibiotics effective for preventing infections in total joint replacement?
Patient: patients receiving total joint replacement
Intervention: prophlyatic antibiotics
Comparision: antibiotic administration versus no antibiotic administration
Outcome: prevention of infection
Think critically of the words you use
Patients:
Are they inpatients, outpatients, rehabilitation patients, pediatric patients?
Infection:
What kind of infection...bloodstream, urinary tract, hospital-associated, MRSA?
Spell it out
The databases don’t always recognize abbreviations. If you can’t find it, spell it out.
ACL = anterior cruciate ligament
“C diff” = clostridium difficile
“Botox injection” = botulinum toxin
Put it in quotes
Many search engines such as PubMed automatically search for a phrase. However, you can force a search engine to look for an exact phrase by putting quotation marks around it.
"Asthma quality of life questionnaire"
“Faces pain scale”