Table 1

Univariable conditional logistic regression analyses 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

Controls
(n=354)
Cases
(n=177)
Crude OR
(95% CI)
P value
Age in years (median, IQR)29 (25 to 34)29 (25 to 34)0.995*
Antibiotic use in the last month
 No287 (84.7%)140 (83.8%)Ref
 Yes52 (15.3%)27 (16.2%)1.01 (0.60 to 1.70)0.965
Frequency of mouthwash use
 Less than daily244 (69.1%)125 (71.0%)Ref
 Daily109 (30.9%)51 (29.0%)0.92 (0.61 to 1.38)0.682
Regular sex partner(s)
 No141 (40.2%)95 (54.3%)Ref
 Yes210 (59.8%)80 (45.7%)0.56 (0.39 to 0.81)0.002
Casual sex partner(s)
 No71 (20.7%)21 (12.1%)Ref
 Yes272 (79.3%)153 (87.9%)1.90 (1.13 to 3.20)0.016
Nr of CSP (median, IQR)3 (1 to 6)5 (2 to 10)<0.001*
Nr of CSP tongue kissed (median, IQR)2.5 (1 to 5)4 (2 to 8)<0.001*
CSP tongue kissed
 No84 (24.7%)23 (13.3%)Ref
 Yes256 (75.3%)150 (86.7%)2.17 (1.31 to 3.59)0.003
Duration (min) of tongue kissing (median, IQR)10 (5 to 20)10 (5 to 20)0.379*
Days since last tongue kissing (median, IQR)7 (3 to 21)10 (5 to 21)0.540*
Nr of CSP for receptive fellatio (median, IQR)3 (0 to 6)5 (2 to 10)<0.001*
CSP for receptive fellatio
 No85 (25.1%)24 (14.0%)Ref
 Yes253 (74.9%)148 (86.0%)2.04 (1.26 to 3.30)0.004
Duration (min) of receptive fellatio (median, IQR)
(mean)
10 (5 to 15)10 (5 to 15)0.038*
Days since last receptive fellatio
 With ejaculation14 (7 to 30)14 (7 to 30)0.381*
 Without ejaculation11 (6 to 28)14 (7 to 21)0.716*
Nr of CSP for insertive rimming (median, IQR)1 (0 to 2)1 (0 to 3)0.035*
CSP for insertive rimming
 No157 (46.4%)69 (39.9%)Ref
 Yes181 (53.6%)104 (60.1%)1.38 (0.94 to 2.03)0.099
Duration (min) of insertive rimming (median, IQR)5 (0 to 10)4 (0 to 10)0.820*
Days since last insertive rimming14 (7 to 30)14 (7 to 30)0.555*
  • Casual sex partners and regular sex partners refer to the numbers reported for the last 3 months. For some questions, data are missing because either some study participants did not answer that question on the survey or because they answered “I don’t know.”

  • *Analysed by Mann-Whitney test.

  • †Analysed by conditional logistic regression.

  • CSP, casual sex partner;  fellatio, oro-penile sex; Nr, number; rimming, oro-anal sex.