Validation of the Persian Translation of the Swallowing Disturbance Questionnaire in Parkinson’s Disease Patients

Table 3

Results of the comparison between the Persian version of the questionnaire and videofluoroscopic swallowing study.

SDQ-P score	Normal	Aspiration	Total
12	44	0	44
12	5	10	15
Total	49	10	59
Sensitivity	96.7%
Specificity	91.2%
Positive predictive value (PPV)	0.67
Negative predictive value (NPV)	1.00
Pretest probability	16.9%
Posttest probability	66.7%

SDQ-P: the Persian version of the Swallowing Disturbance Questionnaire.