2. Objective
To find evidence-based
recommendations for the practice of
Vitamin D testing.
3. Method
Searched numerous databases
◦ The Cochrane Library, PubMed, EMBASE,
AHRQ, Google Scholar and TRIP.
Used various search techniques
◦ Synonyms: Vitamin D, 25-hydroxy-vitamin D,
25-hydroxyvitamin D, 25-OH D
◦ Boolean operators AND, OR, NOT to
combine terms
◦ Truncation to broaden results
Used backward and forward citation
linking
4. Inclusion Criteria
Evidence-based
◦ Systematic reviews, synthesis,
summaries, clinical guidelines, and
evidence-based narrative reviews
Timely
◦ Within the last five years
Critical evaluation
◦ Meet JAMA‟s “Users' Guides to Evidence-
based Medicine” evaluative criteria
5. Limitations
Undefined information need
Literature search had very broad
scope
Time constraints
Working alone on project
6. Synthesis Overview
Background
◦ Currently a lot of interest in vitamin D
◦ Literature divided on its impact on various
health outcomes
◦ No agreement on validity of vitamin D
deficiency epidemic
Key findings
◦ Agreement that routine testing is
unnecessary
◦ Could be need for testing in certain „high-
risk‟ populations
