Table 2.

Cross correlation between the ranking of websites presented in the 4 engines, DISCERN, the Journal of American Medical Association benchmark, and Flesch Reading Ease adapted to Brazilian Portuguese.

Outcomes	Ranking Baidu (ρ, P)	Ranking Yahoo! (ρ, P)	Ranking Bing (ρ, P)	DISCERN (S1+S2a; ρ, P)	JAMAb (ρ, P)	FRE-BPc (ρ, P)
Ranking Google	.78 .02	.86 <.001	.78, .02	−.22, .08	−.28, .02	.03, .84
Ranking Baidu		.60, .40	.95, <.001	−.19, .53	−.11, .73	.02, .96
Ranking Yahoo!			.77, .07	.22, .39	−.02, .93	−.04, .89
Ranking Bing				−.36, .23	−.19, .54	.03, .92
DISCERN					.58, <.001	−.23, .05
JAMA						.04, .76

^aS1 + S2 = sum of scores of sections 1 and 2 of DISCERN.

^bJAMA: the Journal of American Medical Association.

^cFRE-BP: Flesch Reading Ease adapted to Brazilian Portuguese.