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Table 3 Exploratory factor analysis and internal consistency conducted separately for the 7 observers NYHA classification (target items) and combined with the 4 anchor items

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

Item Eigenvalue1 Eigenvalue2 CFI1 Alpha
Cronbach
Observer 1 3.261 1.856 0.687 0.799
Observer 2 3.383 0.929 0.988 0.778
Observer 3 --- --- --- ---
Observer 4 3.754 0.803 0.992 0.790
Observer 5 3.972 0.864 0.987 0.839
Observer 6 3.056 1.406 0.934 0.607
Observer 7 3.363 1.178 0.984 0.732
Observer 8 3.368 0.863 1.000 0.791
  1. 1Comparative Fit Index.