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Table 1 Results of the variance component analysis for the full scale and for item 2 to 10

From: Administering the MADRS by telephone or face-to-face: a validity study

  Variance components Percentages of total (%) Estimates of the variance components
Full scale Patients 29.8 0.824
  Assessment Modea 5.7 0.157
  Measurement errorb 35.2 0.973
  Residual error 29.4 0.814
Item 2 to 10 Patients 28.7 0.808
  Assessment Mode 5.5 0.154
  Measurement error 38.0 1.074
  Residual error 27.8 0.783
Combined model Patients 34.5 0.958
  Test length by Mode 0.8 0.02
  Measurement + Residual error 64.8 1.80
  1. a Assessment Mode: face-to-face or telephonic
  2. b Measurement error was assessed by the Patient * Item terms