Table 3 Collinearity diagnosis of factors associated with HIV testing

X1:Gender

0.65

1.54

X2:Sexual orientation

0.65

1.54

X3:Major

0.96

1.04

X4:Grade

0.98

1.02

X5: HIV-related knowledge

0.90

1.11

X6: HIV-related stigma

0.91

1.10

X7: Willingness to utilize HTC service

0.93

1.08

X8: Recognition of the necessity to provide HTC

0.91

1.10

X9: Residential areas

0.96

1.04

X10: Monthly expenditure

0.95

1.05

X11: Knowledge of local AIDS service organization

0.96

1.04

X12: Perception of HIV risk

0.97

1.03

X13: Condomless sex

0.87

1.15

X14: Early sexual debut

0.86

1.16