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Table 3 Evidence for validity of five data sources for enumerating retail food outlets in comparison to ground-truthed data for open and closed outlets in six State Designated Tribal Statistical Areas and two US Census-Designated Places in North Carolina, 2009-2010

From: Evidence for validity of five secondary data sources for enumerating retail food outlets in seven American Indian Communities in North Carolina

Secondary Data Source

Type of Food Outlet (n=total number of food outlets by outlet type)

All Food Outlets (n=891)

Agreement Statistics (95% Confidence Interval)

Sensitivity (95% CI*)

Positive Predictive Value (95% CI*)

Concordance (95% CI*)

Kappa (95% CI*)

Local Health County

0.66 (0.62, 0.70)

0.49 (0.46, 0.53)

0.42 (0.39, 0.46)

0.41 (0.36, 0.47)

State Agriculture Department

0.17 (0.14, 0.20)

0.13 (0.10, 0.15)

0.11 (0.09, 0.13)

0.06 (0.03, 0.10)

ReferenceUSA

0.89 (0.86, 0.92)

0.67 (0.63, 0.70)

0.57 (0.54, 0.61)

0.62 (0.56, 0.67)

Dun & Bradstreet

0.41 (0.37, 0.45)

0.31 (0.28, 0.34)

0.27 (0.24, 0.30)

0.24 (0.20, 0.29)

Online Yellow Pages

0.55 (0.51, 0.59)

0.41 (0.38, 0.45)

0.35 (0.32, 0.39)

0.24 (0.18, 0.30)

  1. *(lower 95% confidence interval, upper 95% confidence interval).