Impact of Progression of Parkinson’s Disease on Swallowing Ability and Oral Environment

Table 2

Correlations between each measured value and score in the next 56 participants.

	Age (years)	Disease duration (years)	Hoehn and Yahr stage	UPDRS part III	BMI (kg/m^2)	SDQ	LEDD (mg)
SDQ	rho = −0.067,	rho = 0.228,	rho = 0.183,	rho = 0.307,	rho = 0.077,		rho = 0.126,
Bite force (N)	rho = −0.113,	rho = −0.163	rho = 0.099,	rho = −0.010,	r = 0.124,	rho = −0.028,	rho = -0.044,
Tongue pressure (kPa)	rho = −0.238,	rho = −0.021	rho = −0.090,	rho = −0.187,	r = 0.138,	rho = −0.139,	rho = 0.131,
Oral bacterial count score	rho = 0.014,	rho = −0.132	rho = 0.061,	rho = −0.080,	r = −0.007,	rho = −0.289,	rho = −0.411,

, ^∗∗p < 0.01. UPDRS, Unified Parkinson’s Disease Rating Scale; BMI, body mass index; FOIS, Functional Oral Intake Scale; SDQ, Swallowing Disturbances Questionnaire; LEDD, levodopa equivalent daily dose.