Table 3

Operating characteristics of PDI-4 based diagnosis relative to diagnosis based on corresponding rating scales
Operating Characteristics of PDI-4 Scale Using the Comparator Scale Diagnostic Cutoff
PDI-4 Scale Comparator Scale Diagnostic Cutoff Sensitivity (95% CI) Specificity (95% CI) PPV (95% CI) NPV (95% CI)
PDI-4-GAD HADS-A (≥ 14) 0.64 (0.54, 0.74) 0.92 (0.90, 0.93) 0.44 (0.35, 0.52) 0.96 (0.95, 0.97)
PDI-4-MDE PHQ-9 (≥ 12) 0.69 (0.64, 0.75) 0.90 (0.88, 0.92) 0.72 (0.66, 0.77) 0.89 (0.87, 0.91)
PDI-4-ADHD CAARS-S (≥ 28) 0.70 (0.62, 0.77) 0.87 (0.85, 0.89) 0.49 (0.42, 0.55) 0.94 (0.93, 0.96)
PDI-4-Mania MDQ (≥ 7) 0.52 (0.46, 0.59) 0.86 (0.83, 0.88) 0.52 (0.46, 0.59) 0.86 (0.83, 0.88)

Abbreviations: ADHD = attention deficit hyperactivity disorder; CAARS-S = Conners’ Adult ADHD Rating Scale Self Report; CI = confidence interval; HADS-A = Hospital Anxiety and Depression Scale-Anxiety subscale; GAD = generalized anxiety disorder; MDE = major depressive episode; MDQ = Mood Disorder Questionnaire; NPV = negative predictive value; PDI-4 = Provisional Diagnostic Instrument; PHQ-9 = Patient Health Questionnaire for depression; PPV = positive predictive value.

Faries et al.

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

Open Data