Table 4. Comparison of the mean Knowledge Index (KI) between study sites.

Study Site	Comparison between Study Sites	Mean Difference in KI	P*	95% CI
				Minimum	Maximum
Americaninhas	BH	19.3	0.000	9.2	29.3
	Washington, DC	13.2	0.002	4.2	22.2
BH	Americaninhas	19.3	0.000	9.2	29.3
	Washington, DC	6.1	0.437	5.6	17.8
Washington, DC	Americaninhas	13.2	0.002	4.2	22.2
	BH	6.1	0.437	5.6	17.8

KI, Knowledge Index; CI, Confidence interval; BH, Belo Horizonte.

* Tukey-HSD Test.