Table 4.

Clinical data of PD patients of theatre (TH) and control (CT) groups. For each patient, sex, age, years of education, side of disease onset (L = left; R = right), years since diagnosis, mini-mental state examination (MMSE) scores, Hoehn and Yahr scores (H&Y) in ON and OFF state (see text for definitions), and L-dopa equivalent daily dose (LEDD) (mg) at time T0 are given. At the bottom of the table, the t values, the corresponding degrees of freedom, the p values, and Cohen's d values for the comparisons between the two groups are reported. ^∗Equal variances were not assumed. ^§This patient had a deep brain stimulator.

	Sex		Age		Years of education		Side of onset		Years since diagnosis		MMSE		H&Y		LEDD (mg)
	TH	CT	TH	CT	TH	CT	TH	CT	TH	CT	TH	CT	TH	CT	TH	CT
1	M	M	72	57	18	13	L	R	17	8	29	29	3	3	1260	936
2	F	F	57	65	13	5	R	R	7	7	29	30	2	3	505	700
3	M	F	66	64	18	13	R	L	7	6	30	30	3	3	1584	500
4	M	F	67	55	18	13	R	L	8	8	29	29	3	3	728	300
5	M	F	61	68	13	18	R	L	12	8	27	28	3	3	480	630
6	F	F	62	57	13	13	R	R	18	10	29	28	3	3	1073	850
7	F	F	60	47	5	8	L	R	11	4	29	27	2	2	739	453
8	F	F	60	50	18	13	R	R	3	9	30	27	1	2	153	500
9§	F	M	42	65	12	13	L	L	10	5	25	30	2	3	480	353
10	F	M	56	63	10	13	L	R	4	5	25	29	2	2	327	400
11	M	M	39	72	18	8	R	R	7	18	28	30	3	3	1051	605
12	F	M	64	62	11	13	L	L	8	6	28	30	2	2	200	250
Mean			58.8	60.3	13.9	11.9			9.3	7.8	28.2	28.9	2.4	2.7	715	539.8
SD			9.6	7.6	4.2	3.4			4.2	3.7	1.7	1.2	0.2	0.5	445.2	212.7
t-test			t(22) = 0.4		t(22) = −1.3				t(22) = 0.9		t(22) = −1.3		t(22) = −1.0		t(15.8) = 1.2
			p = 0.67		p = 0.21				p = 0.38		p = 0.22		p = 0.31		p = 0.24∗
			Cohen's		Cohen's				Cohen's		Cohen's		Cohen's		Cohen's
			d = 0.18		d = 0.54				d = 0.39		d = 0.5		d = 0.82		d = 0.52