Table 2.

Kappa Statistics and Tabulations of Agreement on City Blocks Between Data Collection Methods, Chicago, Illinois, 2002^a

Business Type	Observed Agreement, %	Expected Agreement, %	Kappa	Agree: Not Present, %	Agree: Present, %	Disagree: Present in SSO, %	Disagree: Present in Prop., %
Drugstores	95.8	92.4	0.45*	93.9	1.9	1.8	2.4
Liquor stores	90.9	85.2	0.38*	87.5	3.4	7.3	1.8
Bars	88.6	79.5	0.45*	82.8	5.8	8.6	2.8
Convenience stores	88.3	82.8	0.32*	84.7	3.6	8.1	3.6
Restaurants	87.4	58.7	0.70*	64.7	22.7	8.4	4.2
Fast-food restaurants	81.8	64.2	0.49*	67.7	14.1	6.3	12.0
Other eating place	83.8	74.7	0.36*	77.4	6.4	13.3	2.9
Supermarkets or grocers	82.5	68.8	0.44*	71.9	10.6	8.3	9.3

Abbreviations: Prop., proprietary data source; SSO, systematic social observation.

* P < 0.001.

^aN = 1,663.