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Fig. 3 | BMC Neurology

Fig. 3

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

Fig. 3

Person-Item threshold map. Key for Fig. 3: 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 distribution of standardized scores while the lower histogram shows the probability of endorsing a given score for a particular item

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