Table 7.

The fixed effects of time and covariates on cepstral peak prominence measured from the sentence “We were away a year ago” in the Parkinson's disease group.

Effect	Estimate	SE	df	t	Pr > |t|
Intercept	12.98	2.48	33	5.24	< .0001
P1	5.53	0.54	154	10.17	< .0001
P2	5.36	0.54	154	9.86	< .0001
Age	−0.05	0.03	154	−1.46	.15
Gender	1.12	0.56	154	2.00	.05
H&Y score	0.86	0.45	154	1.94	.05
Mos from dx	−0.007	0.005	154	−1.46	.15
LC sessions	0.06	0.09	154	0.69	.49

Note. Cepstral peak prominence was calculated only from the sentence “We were away a year ago.” P1, P2 = assessments at approximately 1 and 6 weeks after completion of SPEAK OUT! sessions, respectively; H&Y = Hoehn and Yahr Scale; Mos from dx = months elapsed between diagnosis of Parkinson's disease and first baseline assessment; LC sessions = number of The LOUD Crowd sessions attended.