Skip to main content

Table 6 Discrimination and difficulty parameters for QLQ-CLL17

From: Validation of the Chinese EORTC chronic lymphocytic leukaemia module – application of classical test theory and item response theory

  Discrimination Threshold indices S-χ2 P value
a b1 b2 b3
SB
 CLL1 1.265 −0.286 2.389 2.214 13.52 0.330
 CLL2 3.112 −0.860 0.992 2.062 17.02 0.074
 CLL3 3.166 −0.440 1.203 2.266 11.65 0.309
 CLL4 0.880 −0.692 2.634 2.515 9.64 0.885
 CLL5 1.279 −1.317 0.634 2.319 19.86 0.281
 CLL6 0.761 −0.579 2.216 1.697 19.76 0.409
PC
 CLL7 1.515 −0.290 1.979 2.340 16.52 0.050
 CLL8 3.655 −1.226 0.797 1.727 6.16 0.291
 CLL9 2.603 −0.624 1.174 2.465 3.77 0.438
 CLL10 3.531 −0.699 1.053 1.866 2.18 0.704
WF
 CLL11 3.702 −1.58 −0.121 0.557 10.53 0.65
 CLL12 3.624 −1.667 −0.266 0.354 19.68 0.103
 CLL13 3.568 −1.647 −0.152 0.526 12.62 0.478
 CLL14 2.573 −1.143 0.098 0.395 10.86 0.900
 CLL15 3.877 −1.707 −0.374 0.329 12.88 0.458
 CLL16 0.776 −1.413 1.043 1.268 19.51 0.882
 CLL17 1.022 −1.150 0.473 0.531 28.59 0.330
  1. SB symptom burden, PC physical condition/fatigue, WF Worries/fears about health and functioning, a = discrimination, b = difficulty