Table 2

Correlations between the four PDI-4 scales and corresponding diagnosis scales (PHQ-9, HADS-A, CAARS-S, and MDQ)
PDI-4 GAD PDI-4 MDE PDI-4 ADHD PDI-4 Mania
HADS-A 0.76 0.72 0.66 0.52
PHQ-9 0.75 0.87 0.68 0.46
CAARS-S 0.57 0.54 0.75 0.59
MDQ 0.33 0.33 0.46 0.63

Abbreviations: ADHD = attention deficit hyperactivity disorder; CAARS-S = Conners’ Adult ADHD Rating Scale Self Report; HADS-A = Hospital Anxiety and Depression Scale-Anxiety subscale; MDE = major depressive episode; MDQ = Mood Disorder Questionnaire; PDI-4 = Provisional Diagnostic Instrument; PHQ-9 = Patient Health Questionnaire for depression.

Note: Pearson correlation coefficients are reported. All correlations are significant, p<0.001.

Faries et al.

Faries et al. BMC Family Practice 2012 13:104   doi:10.1186/1471-2296-13-104

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