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. Author manuscript; available in PMC: 2014 Apr 1.
Published in final edited form as: J Am Med Dir Assoc. 2013 Feb 1;14(4):242–247. doi: 10.1016/j.jamda.2013.01.004

Figure 2. Frequency of Observational Study Validity Criteria across Included Studies.

Figure 2

This is a bar graph of the frequency of validity criteria met by studies included in this review. Each study’s validity was evaluated by criteria for prospective studies6. The number of studies that met each criterion is delineated by the dark grey bar.