Table 5.

Correlation between MMSE, TUGT, knee extension strength, and other covariates.

Variables	Sex (male/female)	Education (illiteracy/primary school/junior high school and above)	Job (mental labor/Physical labor/Both)	Drinking (daily/<7 Days/week/former/never)	Smoking (daily/former/never)	Live alone (Yes/No)
MMSE	−0.143***	0.465***	−0.118**	−0.097*	0.030	0.146***
TUGT	0.047	−0.222***	−0.024	0.075	0.027	−0.138**
knee extension strength	−0.346***	0.176***	0.001	−0.231***	−0.037	0.054

Spearman’s correlation analysis; *p < 0.05, **p < 0.01, ***p < 0.001; MMSE, Mini-Mental State Examination; TUGT, Timed Up-and-Go Test.