Table 5.

Results of the evaluation questionnaire for neurologists and patients with Parkinson's disease of the phase 2a and 2b study.

Questions of the evaluation questionnaire	Answer options	Neurologists				PD patients
		Phase 2a		Phase 2b		Phase 2a		Phase 2b
		(n = 11)		(n = 5)		(n = 21)		(n = 10)
		N	%	N	%	N	%	N	%
Do you consider the questionnaire relevant?	Yes	11	100.0	5	100.0	19	90.5	10	100.0
	No	0	0.0	0	0.0	2	9.5	0	0.0
Does the questionnaire help you to assess the current health status related to gastrointestinal symptoms of your PD patients?	Yes	11	100.0	5	100.0	16	76.2	9	90.0
	No	0	0.0	0	0.0	5	23.8	1	10.0
Do you find the questionnaire sufficiently comprehensive?	Yes	11	100.0	5	100.0	17	81.0	9	90.0
	No	0	0.0	0	0.0	4	19.0	0	0.0
Do you think the questionnaire is too long?	Yes	6	54.5	1	20.0	5	23.8	0	0.0
	No	5	45.5	4	80.0	16	76.2	10	100.0
Do you find the questions simple and clear to understand?	Yes	8	72.7	5	100.0	13	61.9	9	90.0
	No	3	27.3	0	0.0	8	38.1	1	10.0
Do you find questions strange / embarrassing?	Yes	3	27.3	N/A		3	14.3	0	0.0
	No	8	72.7	N/A		18	85.7	10	100.0
Do you find certain questions difficult to answer?	Yes	5	45.5	N/A		11	52.4	1	10.0
	No	6	54.5	N/A		10	47.6	9	90.0
Do you find the answer options suitable, clear and appropriate?	Yes	9	81.8	5	100.0	15	71.4	9	90.0
	No	2	18.2	0	0.0	6	28.6	0	0.0
Do you find the order of the questions sensible?	Yes	10	90.9	5	100.0	21	100	9	90.0
	No	1	9.1	0	0.0	0	0.0	0	0.0
Do you have any comments or general suggestions for improving the questionnaire?	Yes	6	54.5	N/A		5	23.8	3	30.0
	No	5	45.5	N/A		16	76.2	7	70.0
Do you find the instructions for conducting and evaluating the questionnaire suitable?	Yes	N/A		5	100.0	N/A		N/A
	No	N/A		0		N/A		N/A
Does the questionnaire help you in screening healthy controls for gastrointestinal symptoms?	Yes	10	90.9	5	100.0	N/A		N/A
	No	1	9.1	0	0.0	N/A		N/A
Do you find the evaluation of the questionnaire suitable?	Yes	6	54.5	5	100.0	N/A		N/A
	No	5	45.5	0	0.0	N/A		N/A
Do you find the assignment of the individual questions to the 8 different domains correct and sensible?	Yes	8	72.7	5	100.0	N/A		N/A
	No	3	27.3	0	0.0	N/A		N/A

PD, Parkinson's disease.