Parkinson’s Disease Gravity Index: A Method by means of Optimal Scaling

Table 3

Descriptive statistics of the sample (N = 120).

Sex	Male 73 (60.8%)
Marital status	Married 86 (71.7%)
	Single 10 (8.3%)
	Others 24 (20%)
Employment status	Retired 73 (60.8%)
	Full-time worker 15 (12.5%)
	Housewife or househusband 12 (10%)
	Others 20 (16.7%)
	Median	Mean ± sd	IQR	S	K
Years of education	7	9.6 ± 5.2	8	0.5	−0.9
Duration of disease (years)	8	9 ± 5.6	7	1.4	3.3
Duration of therapy with L-dopa (years)	6	7.5 ± 5.3	6.3	1.3	2.7
Dose of L-dopa (mg/day)	750	683.5 ± 225.5	250	−0.1	0.5
PIMS	21	19.9 ± 7	10	−0.5	−0.1
CISI total	10	10.1 ± 4.1	6	0.3	−0.3

IQR = interquartile range; S = skewness; C = kurtosis; PIMS: Parkinson’s Impact Scale; CISI: Clinical Impression of Severity Index for Parkinson’s Disease.