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Table 4 Correlation and agreement between residential value index, census income, and self-reported household income (N = 676)

From: Comparison of indicators of material circumstances in the context of an epidemiological study

  Spearman correlation coefficient Overall Kappa (95% CI) Weighted Kappa (95% CI)
Residential value index vs. Self-reported household income 0.52 0.21 (0.16 - 0.25) 0.37 (0.32 - 0.42)
Census income vs. Self-reported household income 0.36 0.09 (0.05 - 0.14) 0.25 (0.20 - 0.30)