Factors associated with incidence of throat gonorrhoea (incidence defined as one event in the case of a run of events)
| Characteristic | n (%) | Events | PY | Incidence rate | Crude IRR | 95% CI | P value* |
| Age (years), median (IQR) | 30 (26–33) | – | – | – | 1.02 | 0.94 to 1.11 | 0.614 |
| Oropharyngeal gonorrhoea in the past 3 months | |||||||
| No | 78 (78) | 10 | 17 | 57.66 | 1 (ref) | – | – |
| Yes | 22 (22) | 2 | 5 | 42.87 | 1.04 | 0.30 to 3.58 | 0.952 |
| HIV status and PrEP use | |||||||
| HIV negative not on PrEP | 89 (89) | 2 | 2 | 112.04 | 1 (ref) | – | – |
| HIV negative on PrEP | 9 (9) | 12 | 20 | 50.69 | 0.49 | 0.12 to 1.95 | 0.312 |
| HIV positive† | 2 (2) | 0 | 0.5 | 0 | N/A | N/A | N/A |
| Weekly sexual practices | |||||||
| Number of kissing partners‡ | – | – | – | – | 1.08 | 1.03 to 1.12 | 0.001 |
| Number of penile-oral sex partners‡ | – | – | – | – | 1.07 | 1.01 to 1.14 | 0.016 |
| Number of insertive rimming partners‡ | – | – | – | – | 1.11 | 0.96 to 1.29 | 0.175 |
*P values from Poisson regression.
†The IRR for the two men living with HIV were not calculated because no incident oropharyngeal gonorrhoea cases were observed.
‡Number of partners for each sexual practice assessed as a continuous variable. Data reflect change in IRR per one additional partner.
CI, confidence intervals; HIV, human immunodeficiency virus; IQR, interquartile range; IRR, incidence rate ratio; PrEP, pre-exposure prophylaxis; PY, person years of follow-up.