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Fig. 1 | Journal of Patient-Reported Outcomes

Fig. 1

From: Evidence for validity of the Swedish self-rated 36-item version of the World Health Organization Disability Assessment Schedule 2.0 (WHODAS 2.0) in patients with mental disorders: a multi-centre cross-sectional study using Rasch analysis

Fig. 1

Bivariate Pearson correlation between methods for calculating an overall score on the WHODAS 2.0. All procedures transform the results to a 0–100 scale. The results are based on Swedish psychiatry outpatients (n = 780). NOTE. The Rasch 0–100 scale refers to data from new analyses where all five rating scale categories were used for each item. a Correlation between person measures is calculated according to the complex (IRT-based) model in the WHODAS 2.0 manual and the Rasch partial credit model (r = 0.90, p < 0.001). b Correlation between person measures is calculated according to the simple model in the WHODAS 2.0 manual (percentage of raw scores) and the Rasch partial credit model (r = 0.89, p < 0.001). c Correlation between person measures is calculated according to the simple model in the WHODAS manual (percentage of raw scores) and the complex model in the WHODAS manual (IRT-based) (r = 0.99, p < 0.001)

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