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Table 5 One-dimensional 2 parameter logistic graded response model with equal discrimination parameters across items

From: Indirect calibration between clinical observers - application to the New York Heart Association functional classification system

  Threshold
11
t1 (se)
Threshold
22
t2 (se)
Item
Discrimination3
Β (se)
"Dyspnea" 0.688 (0.106) --- 2.268 (0.176)
"Distance" -0.349 (0.104) 0.278 (0.094) 2.268 (0.176)
"Stairs" -0.493 (0.102) 0.459 (0.390) 2.268 (0.176)
"Effort" -0.316 (0.099) 0.865 (0.123) 2.268 (0.176)
Observer 1 -0.549 (0.283) 1.503 (0.287) 2.268 (0.176)
Observer 2 -0.099 (0.168) 1.692 (0.631) 2.268 (0.176)
Observer 3 --- --- ---
Observer 4 -1.920 (0.253) 1.420 (1.237) 2.268 (0.176)
Observer 5 0.331 (0.312) 1.671 (0.309) 2.268 (0.176)
Observer 6 -1.211 (0.449) 2.178 (0.728) 2.268 (0.176)
Observer 7 0.430 (0.269) 1.804 (3.418) 2.268 (0.176)
Observer 8 0.339 (0.247) 2.263 (0.305) 2.268 (0.176)
  1. 1Threshold 1 - level of ability above which 50% of subjects were NYHA class II-III
  2. 2Threshold 2 - level of ability above which 50% of subjects were NYHA class III
  3. 3Item discrimination - represents the slope of the item characteristic curves at the value of the threshold and indicates the extent to which the item is related to the ability
  4. se: standard error.