Table 1.

Correlation between GT and CDC geographic and temporal data

a.	Lyme Disease	Ehrlichiosis	RMSF	Coccidioidomycosis
Pearson’s r	0.6912	0.5926	0.4572	0.4169
95% confidence interval	0.5471–0.7955	0.4184–0.7248	0.2521–0.6229	0.1822–0.6066
P-value (two-tailed)	<0.0001	<0.0001	<0.0001	0.0009

b.	2012	2011	2010	2009	2008	2007
Lyme disease	0.7444	0.7505	0.6104	0.6855	0.6095	0.7194
P-value (two-tailed)	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001
Ehrlichiosis	0.3231
P-value (two-tailed)	0.0346
RMSF	0.6386	0.5938	0.3865	0.3184	0.2904	0.06475
P-value (two-tailed)	<0.0001	<0.0001	0.0061	0.0258	0.043	0.6654
Coccidioidomycosis	0.4813	0.4907
P-value (two-tailed)	0.0173	0.0174

Abbreviations: CDC, Center for Disease Control; GT, Google Trends; MMWR, Morbidity And Mortality Weekly Report; RMSF, Rocky Mountain spotted fever.

Table 1a. Pearson’s correlation coefficients and P-values derived from the comparison of cumulative GT search data and CDC MMWR monthly reports for the listed diseases between 2007 and 2012. b. Spearman’s rank correlation coefficients and P-values derived from the comparison of state-based GT search data in the mainland United States to the CDC MMWR monthly reports by state for each individual year listed. Inadequate frequency of searches for state-based subanalysis for Ehrlichiosis from 2007 to 2011 and for Coccidioidomycosis from 2007 to 2010.