Table 6.

Mean reliable change z-scores relative to the healthy control non-surgery peers (n=21).

	PD Non-Surgery (n = 3)		PD Surgery (n = 5)
	M (SD)	Min/max	M (SD)	Min/max
2 weeks
Stroop CW	−0.01 ±1.04	−1.05/1.03	−2.89 ± 4.17	−8.78/0.06
Digit Symbol	−0.75 ± 0.59	−1.33/−.16	−1.66 ± 1.37	−3.09/−.22
HVLT Delay	0.03 ± 1.08	−1.12/1.03	0.27 ± 2.02	−1.21/2.83
Animal Fluency	−0.26 ± 0.68	−0.86/0.48	−0.14 ± 0.65	−0.95/0.70
Finger Tapping	2.23 ± 1.21	1.37/3.09	0.36 ± 1.85	−2.03/2.47
3 months
Stroop CW	−0.22 ± 0.63	−0.85/0.41	−0.65 ± 1.44	−2.42/1.04
Digit Symbol	−0.32 ± 2.07	−2.51/1.60	−1.85 ± 2.32	−4.25/1.25
HVLT Delay	−1.35 ± 2.03	−3.69/−0.18	0.44 ± 2.22	−2.77/3.35
Animal Fluency	−0.36 ± 0.95	−1.42/0.39	−0.19 ± .55	−1.06/0.37
Finger Tapping	1.94 ± 1.39	0.34/2.75	0.91 ± 1.61	−0.12/3.30
1 year
Stroop CW	−1.07 ± 0.64	−1.71/−0.43	−0.75 ± 0.95	−1.82/−0.01
Digit Symbol	−0.54 ± 0.67	−1.32/−0.14	−2.23 ± 0.64	−2.97/−1.54
HVLT Delay	0.50 ± 1.19	−0.85/1.40	0.20 ± 3.36	−4.53/2.86
Animal Fluency	−0.42 ± 1.37	−1.97/0.62	−0.40 ± .36	−0.75/0.07
Finger Tapping	−0.09 ± 0.85	−0.58/0.89	−0.09 ± 1.03	−0.73/1.10

See method section for summary descriptions of the test dependent variables.