From: The association between Urban and Rural Resident Basic Medical Insurance and instrumental activity of daily living disability among middle-aged and older adults in China
Variable
VIF
1/VIF
Age
1.19
0.84
Education status
1.17
0.86
Marital status
1.15
0.87
Gender
1.10
0.91
Residency area
1.08
0.92
Having tap water
1.04
0.96
PM2.5 concentrations
Household income
1.03
0.97
URRBMI
Mean VIF
1.09