Table 2.

Correlations between information from social media and measures of quality^a.

		Measure of quality
Article	Info from social media	Patient experiences	Readmission rates (different measures used)	Mortality (different measures used)	Board certification	Education	Malpractice claims	Infection rates	Clinical quality indicators	Surgeon volume
Bardach, 2012 [40]	Hospital rating	+	+	+/–
Gao, 2012 [15]	Physician rating				+	+	+/–
Greaves, 2012 [28,29]	Hospital rating	+	+	+/–				+
Greaves, 2012 [30]	Family physician rating	+							+/–
Segal, 2012 [34]	No. of reviews									+
	Rating value									–
Timian, 2013 [20]	No. of “likes”	+		+

^aThis table presents the correlations/associations as stated by the authors in the various papers (+: there is correlation, +/–: correlation is weak or not found for all aspects, –: there is no correlation).