Table 2:

Clinical characteristics of converters and non-converters for the interval between T2 and T3

	All Cases N = 23	Converters N = 6	Non-Converters N = 17	Comparison¹
Age in years	83.6 ± 7.7	87.0 ± 4.6	82.4 ± 8.3	p = 0.22^a
Gender (Female)	16 (69.6)	5 (83.3)	13 (68.4)	p = 0.39^b
Race (White)	24 (100)	6 (100)	17 (100)	p = 1.00^b
Education in years	15.2 ± 3.2	14.8 ± 3.4	15.3 ± 3.2	p = 0.75^a
Number of prescription medications	6.5 ± 3.9	6.2 ± 4.8	6.6 ± 3.7	p = 0.83^a
Current cigarette smoker	0 (0.0)	0 (0.0)	0 (0.0)	p = 1.00^b
Age of tremor onset in years	41.3 ± 22.5	54.3 ± 26.4	36.8 ± 19.8	p = 0.10^a
Total tremor score	21.1 ± 4.9	21.3 ± 6.7	21.0 ± 4.4	p = 0.90^a
Tremor duration in years	42.3 ± 21.9	32.7 ± 25.3	45.6 ± 20.2	p = 0.22^a

All values represent mean ± standard deviation or number (percentage).

All values are those obtained at the start of the interval period

Converters to non-converters.

Independent samples t test

Chi-square test