Multivariable conditional logistic regression analysis of oropharyngeal gonorrhoea risk factors between cases with oropharyngeal gonorrhoea and controls without oropharyngeal gonorrhoea, consisting of men who have sex with men attending the Melbourne Sexual Health Centre in 2015. Variables with a VIF greater than 4 not included in the analysis.
| aOR (95% CI) | P value | Uncentred VIF | |
| Frequency of mouthwash use | |||
| Daily | 0.96 (0.63 to 1.47) | 0.865 | 1.33 |
| Less than daily | Ref | ||
| Antibiotic use in the last month | |||
| No | Ref | ||
| Yes | 1.10 (0.75 to 1.61) | 0.615 | 1.31 |
| RSP | |||
| No | Ref | ||
| Yes | 0.75 (0.50 to 1.12) | 0.156 | 1.14 |
| Nr of CSP | 1.25 (1.10 to 1.43) | 0.001 | 1.06 |
aOR, adjusted OR, adjusted for the other variables listed; CSP, casual sexual partner, continuous variable of the number of CSP in the last 3 months; log transformed (x=ln(y+0.1)); Ref, reference category; RSP, regular sexual partner, binary variable; VIF, variance inflation factor.