Table 4.

Multivariable linear regression analysis of clinical and imaging factors associated with tremor severity (TETRAS part II) in total ET, pure ET subtype, and ET plus subtype.

	Total		Pure ET		ET plus
	ET		subtype		subtype
	Beta	P	Beta	P	Beta	P
Gender	0.053	0.457	0.108	0.294	0.085	0.418
Age	0.186	0.036	0.134	0.305	0.289	0.021
BMI	−0.096	0.179	−0.182	0.098	−0.020	0.843
Duration (y)	0.100	0.169	0.237	0.028	0.226	0.822
Frontal horn scores	0.110	0.336	−0.085	0.667	0.156	0.246
Occipital horn scores	−0.060	0.593	0.189	0.287	−0.282	0.051
Frontal lobe scores	0.283	0.062	−0.089	0.683	0.521	0.014
Parietal lobe scores	−0.143	0.337	0.285	0.172	−0.410	0.057
Occipital lobe scores	0.186	0.015	0.202	0.064	0.256	0.020

Significant P-values are in bold.

ET, essential tremor; BMI, body mass index; TETRAS, Tremor Research Group Essential Tremor Rating Assessment Scale.