Table 5.

Median, first quartile and third quartile for number of errors.

	Parkinson’s disease (N = 63)		Essential tremor (N = 53)
	Median	Q1-Q3	Median	Q1-Q3
Phonological fluency
Total errors	2	0–4	2	0–3
Perseveration errors	1	0–3	1	0–2
Set-loss errors	0	0–1	0	0–1
Category fluency
Total errors	1	0–2	1	0–1
Perseveration errors	1	0–1	0	0–1
Set-loss errors	0	0–0	0	0–0
Category switching
Total errors	1	0–2	1	0–2
Perseveration errors	0	0–1	0	0–1
Set-loss errors	0	0–1	0	0–1

Note. Q1 = First quartile; Q3 = Third quartile.