Table 1.

Increased incidence of psychological and gastrointestinal symptoms in PD patients and decreased coffee and alcohol consumption

Question	Response	Subjects		X2	p
		Controls	PD Patients
Diagnosed or suspected anxiety	Yes	11	41	11.52	0.0007
		10.0%	26.1%
	No	98	110
		89.1%	70.1%
Diagnosed or suspected depression	Yes	24	52	5.147	0.0233
		21.8%	33.1%
	No	84	95
		76.4%	60.5%
Diagnosed or suspected sleep problems, insomnia	Yes	14	61	22.61	0.0001
		12.7%	38.9%
	No	92	89
		83.6%	56.7%
Experienced digestive problems in the past 3 months	Yes	40	101	22.69	<0.0001
		36.4%	64.3%
	No	58	40
		52.7%	25.5%
Currently on medication for digestive problems	Yes	16	47	8.086	0.0045
		14.5%	29.9%
	No	89	106
		80.9%	67.5%
Diagnosed or suspected IBD, IBS, Crohn’s, or colitis	Yes	9	26	4.390	0.0361
		8.2%	16.6%
	No	101	126
		91.8%	80.3%
How much caffeinated coffee do you drink	None	26	40	11.61	0.0205
		23.6%	25.5%
	<2 cups a week	10	27
		9.1%	17.2%
	2–6 cups a week	13	16
		11.8%	10.2%
	1–2 cups a day	36	55
		32.7%	35.0%
	3+ cups a day	25	14
		22.7%	8.9%
How much alcohol do you drink	None	31	59	19.38	0.0016
		28.2%	37.6%
	< 2 drinks a week	47	48
		42.7%	30.6%
	2–6 drinks a week	8	31
		7.3%	19.7%
	1 drink a day	9	7
		8.2%	4.5%
	2 drinks a day	12	5
		10.9%	3.2%
	3+ drinks a day	3	2
		2.7%	1.3%