Table 3

Spearman's correlation, Kappa and weighted Kappa coefficients for the association between the area-based income measures and the household income measure

Area-based measure

Group

rs

Kappa

Weighted Kappa


Actual household-level income

All

0.322

0.055

0.322

Non-seniors

0.316

0.054

0.315

Seniors

0.382

0.060

0.382


Best-case Scenario (including non-registrants)

All

0.469

0.260

0.469

Non-seniors

0.497

0.309

0.496

Seniors

0.420

0.113

0.420


Note: rs = Spearman's correlation coefficient.

In Best-Case Scenario, non-registered households are assigned a hypothetical household-level income decile that is identical to their area-based measure.

Hanley and Morgan BMC Health Services Research 2008 8:79   doi:10.1186/1472-6963-8-79

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