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Table 3 Spearman's correlation, Kappa and weighted Kappa coefficients for the association between the area-based income measures and the household income measure

From: On the validity of area-based income measures to proxy household income

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
  1. Note: rs = Spearman's correlation coefficient.
  2. In Best-Case Scenario, non-registered households are assigned a hypothetical household-level income decile that is identical to their area-based measure.