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Table 4 Results of Discriminant function analysis (forward stepwise method) with outcome as the grouping variables.

From: Thyroid function in clinical subtypes of major depression: an exploratory study

Rows: Observed classifications
Columns: Predicted classifications
   Responders Partial responders
  % Correct p = 0.633 p = 0.366
Responders 89.47 17 2
Partial responders 63.64 4 7
Total 80.00 21 9
Classification Functions
  Responders Partial responders (Responders)-(Partial Responders)
  p = 0.633 p = 0.366  
FT4 13.27 14.78 -1.52
TSH 12.21 13.19 -0.98
FT3 0.80 0.06 0.74
TBII 0.37 0.45 -0.07
Constant -106.96 -127.83 20.86
  1. The analysis succeeded in a 80.00% correct classification of depressed patients on the basis of thyroid indices. If we subtract the two functions, then we obtain the following function: 20.86-1.52*(FT4)-0.98*(TSH)+0.74*(FT3)-0.07*(TBII). When this function takes values above zero, then the respected depressed patient is predicted to be a responder with a 89.47% chance of success.