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Bland‐Altman comparison of the 36‐ and the 12‐item versions of the WHODAS 2.0. Limits of agreement (reference range for difference): −8.866 to 10.766; mean difference: 0.950 (CI, 0.567–1.334); range: 0.000–71.960; Pitman test of difference in variance: r=−0.073, P=0.068, n=631.
