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Table 4 Hypothetical example comparing SF-36 orthogonal versus oblique scoring methods for the PCS and MCS

From: Correlated physical and mental health summary scores for the SF-36 and SF-12 Health Survey, V.1

  Physical Health Scale z-scores = 1 Physical Health Scale z-scores = 0.3
  Mental Health Scale z-scores = 0.3 Mental Health Scale z-scores = 1
PCSuc 62.2 50.1
PCSc 60.0 55.1
MCSuc 49.6 62.8
MCSc 54.6 60.3
  1. Summary score results if the scales that load heavily on physical health (physical health, role physical, bodily pain, general health) have z-scores of 1 and the scales that load heavily on mental health (vitality, social functioning, role-emotional and emotional well-being) have z-scores equal to 0.3. Also illustrated are the summary scores if the z-scores for scales loading heavily on physical health are equal to 0.3 and z-scores for scales loading heavily on mental health are equal to 1.