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.