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Table 1 Demographics, risk factors and clinical features, by diagnosis – GU cases and NGU controls

From: Men at risk of gonococcal urethritis: a case-control study in a Darwin sexual health clinic

 Total
n = 145 (100%)
GU - cases
n = 25 (17.2%)
NGU - controls
n = 120 (82.8%)
OR (95% CI)aOR (95% CI)
Demographics
 Median age, years (IQR)31 (25 to 40)40 (30 to 50)30 (24 to 38)  
 Age > =3081/145 (55.9%)19/25 (76.0%)62/120 (51.7%)3.0 (1.1 to 7.9)*3.0 (0.9 to 9.6)
 Aboriginal16/142 (11.3%)6/25 (24.0%)10/117 (8.5%)3.4 (1.1 to 10.4)*1.4 (0.3 to 7.0)
 Born overseas57/145 (39.3%)6/25 (24.0%)51/120 (42.5%)0.4 (0.2 to 1.1)Excluded
Risk factors and behaviours
 Median no. of sexual partners, past 6/12 (IQR)3 (2 to 6)3.5 (2 to 7)3 (2 to 5)  
 > =5 sexual partners, past 6/1255/145 (37.9%)11/25 (44.0%)44/120 (36.7%)1.4 (0.6 to 3.2)Excluded
 Men who have sex with men (MSM)12/145 (8.3%)2/25 (8.0%)10/120 (8.3%)1.0 (0.2 to 4.7)0.46 (0.1 to 2.8)
 Condom used in most recent encounter18/145 (12.4%)1/25 (4.0%)17/120 (14.2%)0.3 (0.0 to 2.0)Excluded
 Casual partner in most recent encounter113/145 (77.9%)21/25 (84%)92/120 (75.0%)1.6 (0.5 to 5.0)Excluded
Clinical features
 Median duration of symptoms, days (IQR)5 (2 to 10)2.5 (1 to 4)7 (3 to 14)  
 > =7 days of symptoms73/145 (50.3%)5/25 (20.0%)68/120 (56.7%)0.3 (0.1 to 0.9)*Excluded
 History of discharge67/145 (46.2%)18/25 (72.0%)49/120 (40.8%)3.7 (1.4 to 9.6)*5.7 (1.4 to 22.6)*
 History of discharge purulent discharge39/145 (26.9%)14/25 (56.0%)25/120 (20.8%)4.8 (2.0 to 11.9)Excluded
 History of urethral discomfort135/145 (93.1%)23/25 (92.0%)112/120
(93.3%)
0.8 (0.2 to 4.1)Excluded
 Any abnormalities on genital examination59/116 (50.9%)19/21 (90.5%)40/95 (42.1%)13.1 (2.9 to 59.3)10.4 (2.1 to 50.8)*
  1. Bold font indicate statistically significant result, *p < 0.05, p < 0.01. Manual backward step method for model building with initial p = 0.20 cut-off, adjusting for age > 30, Aboriginal status, and men with same sex partners. Final multivariate model included age > 30, Aboriginal status, men with same sex partners, clinical presentation of discharge and any abnormalities on genital examination