Figure 1From: Psychometric evaluation of the Taiwan Chinese version of the EORTC QLQ-PR25 for HRQOL assessment in prostate cancer patientsPerson measure-item threshold map for each EORTC QLQ-PR25 domain. Logit values of the three thresholds and mean item difficulty are represented by the numerical values 1, 2, and 3 and a diamond marker, respectively.Back to article page