Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Variance inflation factors for covariates included in the multivariable logistic regression model.
| Variable | VIF |
|---|---|
| TB close-contact exposure | 1.053 |
| Age | 1.128 |
| Gender | 1.097 |
| Grade | 1.013 |
| Ethnicity | 1.008 |
| Household registration | 1.021 |
| Household economic status | 1.021 |
| Teacher-student relationship | 1.091 |
The correlation between age and grade was weak (r = 0.057).
