TABLE 2.

Mean (SD) values on demographics, clinical and general cognitive data (mean of raw scores and SDs), from PD patients and controls; p-values and effect sizes are provided.

Variable	PD	Controls	t/U	p-value	d
Age	67.3 (9.7)	67.1 (5.64)	–0.29	0.93	0.034
Years of schooling	13.4 (4.6)	14.1(3.08	–0.38	0.64	0.173
MoCA testa	26.5 (2.4)	27.6 (1.2)	–1.2	0.14	0.561
QUIP-RS	2.07 (2.53)	0.53 (0.74)	2.26	0.032	0.839
SF-36 physical health	64.27 (22.75)	80.13 (6.32)	39.5	0.015§	–0.649
SF-36 mental health	59 (9.61)	77.53 (7.48)	14	0.001§	–0.876

Comparison between PD and control groups (t/U-test significance); PD, Parkinson’s disease; MoCA, Montreal Cognitive Assessment; MoCA maximum score, 30; cut-score ≥ 26; QUIP-RS, Questionnaire for Impulsive-Compulsive Disorders in Parkinson’s Disease-Rating Scale; SF-36, Short Form-36 Health Survey. ^§ Mann–Whitney test used. The rest were independent samples t-tests. For the Mann–Whitney test, effect size is given by the rank biserial correlation. ^aLooking into individual performance, 6 patients were just below the cut off score for mild cognitive impairment (MoCA cut off score = 26): four of these patients’ score was 25 and two patients’ was 22.