TABLE 3.

Correlation between lip‐seal strength and survey items

	Lip‐seal strength (N)
	Overall		Man		Woman
	r	p‐value	r	p‐value	r	p‐value
Age (years)	0.082	0.133	0.041	0.598	0.161	0.037
Sex (0: women, 1: men)	0.313	<0.001	–	–	–	–
ODK /pa/ (times/s)	0.206	<0.001	0.117	0.159	0.202	0.015
ODK /ta/ (times/s)	0.155	0.008	0.064	0.439	0.169	0.043
ODK /ka/ (times/s)	0.148	0.011	0.107	0.198	0.149	0.075
Tongue pressure (kPa)	0.335	<0.001	0.257	0.001	0.288	<0.001
Occlusal force (kN)	0.215	<0.001	0.195	0.017	0.068	0.428
Masticatory performance (mg/dL)	0.295	<0.001	0.204	0.012	0.315	<0.001

Note: The lip‐seal strength significantly correlated with age in women. In men, no significant correlation was noted between age and lip‐seal strength.

Abbreviation: ODK, oral diadochokinesis.