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Table 2 Sensitivity and specificity of the MDQ and BSDS to diagnose bipolar disorder, borderline personality disorder, and histrionic personality disorder according to several cut-off points

From: Using the mood disorder questionnaire and bipolar spectrum diagnostic scale to detect bipolar disorder and borderline personality disorder among eating disorder patients

  BPII BPD Histrionic
  N (sensitivity, specificity, LR+)
  15 12 23
MDQ≥7 with moderate functional impairment 3 (0.20, 0.81, 1.1) 5 (0.42, 0.85, 2.8) 6 (0.26, 0.84, 1.6)
MDQ≥6 with moderate functional impairment 8 (0.53, 0.78, 2.4) 7 (0.58, 0.80, 2.9) 7 (0.30, 0.76, 2.1)
MDQ≥6 with minor functional impairment 8 (0.53, 0.78, 2.4) 7 (0.58, 0.77, 2.5) 8 (0.35, 0.75, 1.4)
MDQ≥5 with minor functional impairment 10 (0.67, 0.68, 2.1) 8 (0.67, 0.67, 2.0) 12 (0.52, 0.67, 1.6)
BSDS≥13 8 (0.53, 0.78, 2.4) 8 (0.67, 0.79, 3.2) 10 (0.44, 0.78, 2.0)
BSDS≥12 10 (0.67, 0.73, 2.9) 10 (0.83, 0.74, 3.2) 12 (0.52, 0.73, 1.9)
BSDS≥11 12 (0.80, 0.70, 2.7) 11 (0.92, 0.70, 3.1) 15 (0.65, 0.71, 2.2)
BSDS≥10 12 (0.80, 0.64, 2.2) 11 (0.92, 0.64, 2.6) 15 (0.65, 0.64, 1.8)
BSDS≥9 13 (0.88, 0.59, 2.2) 11(0.92, 0.58, 2.2) 18 (0.78, 0.82, 4.3)
  BPII only BPD only  
  N (sensitivity, specificity, LR+)  
  10 7  
MDQ≥7 with moderate functional impairment 2 (0.20, 0.81, 1.1) 4 (0.57, 0.78, 2.6)  
MDQ≥5 with minor functional impairment 7 (0.70,0.66, 2.1) 5 (0.71, 0.65, 2.0)  
BSDS≥13 5 (0.50, 0.75, 2.0) 5 (0.71, 0.70, 2.4)  
BSDS≥12 6 (0.60, 0.69, 1.9) 6 (0.86, 0.70, 2.9)  
BSDS≥11 7 (0.70, 0.67, 2.1) 6 (0.86, 0.65, 2.5)  
  1. MDQ: Mood Disorder Questionnaire, BSDS: Bipolar Spectrum Diagnostic Scale, BPII: bipolar II disorder, BPII only: bipolar II disorder without borderline personality disorder, BPD: borderline personality disorder, BPD only: borderline personality disorder without bipolar II disorder, Histrionic; Histrionic personality disorder, LR+: Likelihood Ratio for a positive test.