Table 3.

Multivariate linear regression equations predicting treatment satisfaction from demographic, clinical, and treatment use variables.

Outcome	Explanatory variable	B	p
Current treatment helps achieve primary goal 1
	Tremor severity a	−0.30	0.002
	Dropped activities/interests b	0.01	0.99
	Negative psychological state a	−0.23	0.02
	Deep brain stimulation surgery c	0.31	0.001
	Physical side effects a	−0.19	0.11
	Mental health side effects a	−0.02	0.90
	Inclusion in the treatment selection process a	0.32	0.001
Current treatment is working 2
	Head/voice/jaw tremor present d	–0.19	0.02
	Negative psychological state a	–0.18	0.04
	Deep brain stimulation surgery c	0.21	0.04
	Physical side effects a	–0.24	0.02
	Mental health side effects a	0.01	0.95
	Inclusion in the treatment selection process a	0.38	0.001
Current treatment is a good thing for me 3
	Head/voice/jaw tremor presentd	−0.16	0.09
	Negative psychological state a	−0.10	0.30
	Botulinum toxin use c	–0.21	0.02
	Deep brain stimulation surgery c	0.12	0.21
	Physical side effects a	−0.12	0.32
	Mental health side effects a	−0.08	0.54
	Inclusion in the treatment selection process a	0.39	0.001
Current treatment is worth side effects 4
	Deep brain stimulation surgery c	0.10	0.29
	Physical side effects a	−0.20	0.13
	Mental health side effects a	−0.08	0.55
	Inclusion in the treatment selection process a	0.44	0.001

DF vary slightly due to missing data. B = standardized beta. Bolded p values are significant at p < 0.05. High scores on the outcome variable suggest treatment is perceived more positively than do low scores.

^aHigher values indicate greater levels of the described construct.

^b0 = no, 1 = yes.

^c0 = treatment not currently in use, 1 = treatment currently in use.

^d0 = tremor absent, 1 = tremor present.

¹F_equation (7, 96) = 10.02, adjusted R² = 0.40, p < 0.001.

²F_equation (6, 96) = 10.61, adjusted R² = 0.38, p < 0.001.

³F_equation (7, 95) = 7.08, adjusted R² = 0.31, p < 0.001.

⁴F_equation (4, 95) = 9.34, adjusted R² = 0.26, p < 0.001.