Impulsive-Compulsive Behaviours in Belgian-Flemish Parkinson’s Disease Patients: A Questionnaire-Based Study

Table 2

Calculation of PPV and speculative calculation of AUC, sensitivities, and specificities of the Flemish translation of QUIP in comparison to the original version validated by Weintraub and coworkers [17].

	N	AUC (ref. value original)	Cutoff	Sensitivity (ref. value original)	Specificity (ref. value original)	PPV (ref. value original)
All ICB (ICD + PHW + DDS)	73	0.881(0.85)	—	1 (0.96)	0.76 (0.73)	0.27 (0.62)
All ICD	73	0.841(0.88)	—	0.8 (0.97)	0.88 (0.79)	0.34 (0.53)
Gambling	73	0.493	2	0 (0.91)	0.98 (0.97)	0 (0.71)
Hypersexuality	73	0.971	1	1.0 (1.0)	0.94 (0.89)	0.43 (0.47)
Compulsive shopping	73	—	1	—(0.8)	—(0.89)	—(0.33)
Binge eating	73	0.846	2	0.75 (0.86)	0.94 (0.89)	0.43 (0.26)
Punding, hobbyism, or walkabout	73	0.893	1	1 (0.6–0.96)	0.79 (0.9–0.97)	0.17 (0.43–0.61)
DDS	73	—	—	—	—	—

ICB: impulsive-compulsive behaviours; ICD: impulse control disorders; PHW: punding, hobbyism, and walkabout; DDS: dopamine dysregulation syndrome; AUC: area under the curve; PPV: positive predictive value. ; ; no presence of this disorder was detected in our study population.