Table 1.

Comparison of the case fatality ratio (%) by U.S. Region.

Census Region		Mean Difference	95% Confidence Interval of Mean		Significance
			Lower Bound	Upper Bound
South Region	Midwest Region	0.022	−0.58	0.63	1.000
	West Region	−2.01	−4.98	0.96	0.286
	Northeast Region	−2.65	−3.09	−2.20	0.0001
Midwest Region	South Region	−0.022	−0.63	0.58	1.000
	West Region	−2.03	−5.03	0.97	0.287
	Northeast Region	−2.67	−3.33	−2.01	0.0001
West Region	South Region	2.01	−0.96	4.98	0.286
	Midwest Region	2.03	−0.97	5.03	0.287
	Northeast Region	−0.64	−3.62	2.34	0.941
Northeast Region	South Region	2.65	2.20	3.09	0.0001
	Midwest Region	2.67	2.01	3.33	0.0001
	West Region	0.64	−2.34	3.62	0.941