Table 2.

Spearman rank correlations between mean daily Yahoo! search activity score (United States, 2001–2003), estimated incidence, estimated mortality, and number of news reports

	Spearman Rank Correlation*
	Mean Daily Yahoo! Search Activity Score	Estimated Incidence	Estimated Mortality
Number of news reports	.88†	.62‡	.74†
Estimated mortality	.66†	.71†	-
Estimated incidence	.50§	-	-

^* Spearman rank correlations were done on the rankings reported in Table 1.

^† P ≤ .001

^‡ P = .002

^§ P = .015