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Fig. 2 | BMC Neurology

Fig. 2

From: Measurement properties of painDETECT: Rasch analysis of responses from community-dwelling adults with neuropathic pain

Fig. 2

Person-Item Map grouped by sex. Key for Fig. 2: These dual histograms illustrated the relationship of the severity of NeP in the respondents (top) to the difficulty of the items (bottom). The logits scale on the x-axes of the graphs represents a standardized score where the mean severity or difficulty is set to 0, and one logit = one SD. The y-axis of the top histogram shows the probability of attaining the standardized score if you are a male vs. female; while the lower histogram shows the probability of endorsing a given score for a particular item

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